NPOI帮助类

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Web;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.Record;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.XSSF;
using NPOI.XSSF.UserModel;
using NPOI.XSSF.Util;
using NPOI.POIFS;
using NPOI.SS.UserModel;
using NPOI.Util;
using NPOI.SS;
using NPOI.DDF;
using NPOI.SS.Util;
using System.Collections;
using System.Text.RegularExpressions;

public class ExcelHelper
{
    #region 从datatable中将数据导出到excel
    public static HSSFWorkbook ExportWorkbook(DataTable dtSource, string SheetName, string ColumnProperty)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        if (SheetName == null || SheetName == "") SheetName = "Sheet1";
        HSSFSheet sheet = workbook.CreateSheet(SheetName) as HSSFSheet;

        // 标题样式
        HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        headStyle.Alignment = HorizontalAlignment.Center;
        headStyle.VerticalAlignment = VerticalAlignment.Center;
        headStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.WrapText = true;
        HSSFFont font = workbook.CreateFont() as HSSFFont;
        font.Boldweight = (short)FontBoldWeight.Bold;
        headStyle.SetFont(font);

        //内容样式
        HSSFCellStyle cellStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyle.CloneStyleFrom(headStyle);
        cellStyle.Alignment = HorizontalAlignment.Center;
        font = workbook.CreateFont() as HSSFFont;
        font.Boldweight = (short)FontBoldWeight.Normal;
        cellStyle.SetFont(font);
        HSSFCellStyle cellStyleLeft = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyleLeft.CloneStyleFrom(cellStyle);
        cellStyleLeft.Alignment = HorizontalAlignment.Left;
        HSSFCellStyle cellStyleRight = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyleRight.CloneStyleFrom(cellStyle);
        cellStyleRight.Alignment = HorizontalAlignment.Right;

        int rowIndex = 0;
        #region 列头及样式
        HSSFRow headerRow = sheet.CreateRow(rowIndex) as HSSFRow;
        foreach (DataColumn column in dtSource.Columns)
        {
            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
        }
        #endregion
        rowIndex++;
        foreach (DataRow row in dtSource.Rows)
        {
            #region 填充内容
            HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
            foreach (DataColumn column in dtSource.Columns)
            {
                HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
                newCell.CellStyle = cellStyle;
                AutoSetType(newCell, column, row);
            }

            #endregion
            rowIndex++;
        }
        AutoSizeColumns(sheet);

        if (ColumnProperty != null)
        {
            string[] ColumnArray = ColumnProperty.Split('|');
            foreach (string Column in ColumnArray)
            {
                string[] ValueArray = Column.Split(',');
                if (ValueArray.Length > 2)
                {
                    int cols = int.Parse(ValueArray[1]);
                    switch (ValueArray[0].ToString())
                    {
                        case "Merge":
                            int precols = 0;
                            int.TryParse(ValueArray[2], out precols);
                            GroupCol(sheet, 1, cols, precols);
                            break;
                        case "Width":
                            int columnWidth = 0;
                            int.TryParse(ValueArray[2], out columnWidth);
                            sheet.SetColumnWidth(cols, columnWidth * 256);
                            break;
                        case "Align":
                            string Value = ValueArray[2].ToString();
                            for (int j = 1; j <= sheet.LastRowNum; j++)
                            {
                                ICell currentCell = sheet.GetRow(j).GetCell(cols);
                                switch (Value)
                                {
                                    case "center":
                                        currentCell.CellStyle = cellStyle;
                                        break;
                                    case "left":
                                        currentCell.CellStyle = cellStyleLeft;
                                        break;
                                    case "right":
                                        currentCell.CellStyle = cellStyleRight;
                                        break;
                                }
                            }
                            break;
                        case "DataType":
                            string Value2 = ValueArray[2].ToString();
                            for (int j = 1; j <= sheet.LastRowNum; j++)
                            {
                                ICell currentCell = sheet.GetRow(j).GetCell(cols);
                                string drValue = currentCell.ToString();
                                switch (Value2)
                                {
                                    case "double":
                                        double result;
                                        if (double.TryParse(drValue, out result))
                                            currentCell.SetCellValue(result);
                                        break;
                                    case "string":
                                        currentCell.SetCellValue(drValue.ToString());
                                        break;
                                }
                            }
                            break;
                    }
                }
            }
        }
        return workbook;
    }

    /// <summary>
    /// DataTable导出到Excel的MemoryStream
    /// </summary>
    /// <param name="dtSource">源DataTable</param>
    public static MemoryStream ExportDT(DataTable dtSource, string SheetName, string ColumnProperty)
    {
        using (MemoryStream ms = new MemoryStream())
        {
            HSSFWorkbook workbook = ExportWorkbook(dtSource, SheetName, ColumnProperty);
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            return ms;
        }
    }

    public static void ExportDTtoExcel(DataTable dtSource, string strFileName, bool SaveFile)
    {
        ExportDTtoExcel(dtSource, strFileName, SaveFile, null, null);
    }

    /// <summary>
    /// DataTable导出到Excel文件
    /// </summary>
    /// <param name="dtSource">源DataTable</param>
    /// <param name="sFileName">文件名</param>
    /// <param name="SaveFile">是否需保存</param>
    /// <param name="SheetName">Sheet名</param>
    /// <param name="ColumnProperty">列属性集,多个属性集以"|"分隔,值以","分隔,范例:"Merge,0,0|Align,2,right|Width,4,100|DataType,5,double"</param>
    public static void ExportDTtoExcel(DataTable dtSource, string sFileName, bool SaveFile, string SheetName, string ColumnProperty)
    {
        using (MemoryStream ms = ExportDT(dtSource, SheetName, ColumnProperty))
        {
            if (SaveFile)
            {
                using (FileStream fs = new FileStream(sFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
                System.IO.FileInfo fileInfo = new System.IO.FileInfo(sFileName);
                sFileName = fileInfo.Name;
            }
            System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + HttpUtility.UrlEncode(sFileName)));
            System.Web.HttpContext.Current.Response.AddHeader("Content-Length", ms.ToArray().Length.ToString());
            System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
            System.Web.HttpContext.Current.Response.Flush();
            ms.Close();
            ms.Dispose();
            System.Web.HttpContext.Current.Response.End();
        }
    }

    /// <summary>
    /// 导出EXCEL,可以导出多个sheet(不设置列宽)
    /// </summary>
    /// <param name="dtSources">原始数据表</param>
    /// <param name="strFileName">文件名</param>
    /// <param name="SaveFile">是否需要保存此文件</param>
    /// <param name="NeedMargeColumns">需要合并的列，如：3,5</param>
    public static void ExportDTtoExcelNoWidth(DataTable[] dtSources, string strFileName, bool SaveFile, string NeedMargeColumns)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        if (NeedMargeColumns.Length > 0)
        {
            NeedMargeColumns = "," + NeedMargeColumns + ",";
        }
        HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
        for (int k = 0; k < dtSources.Length; k++)
        {
            int[] margeColIndex = new int[dtSources[k].Columns.Count];//保存合并列的起始行
            string[] margeColValue = new string[dtSources[k].Columns.Count];//保存合并列对应的上一个值      
            HSSFSheet sheet = workbook.CreateSheet(dtSources[k].TableName.ToString()) as HSSFSheet;
            //填充表头
            HSSFRow dataRow = sheet.CreateRow(0) as HSSFRow;
            ICellStyle Headstyle = workbook.CreateCellStyle();
            //设置单元格的样式：水平对齐居中
            Headstyle.Alignment = HorizontalAlignment.Center;
            //新建一个字体样式对象
            IFont font = workbook.CreateFont();
            //设置字体加粗样式
            font.Boldweight = short.MaxValue;
            //使用SetFont方法将字体样式添加到单元格样式中 
            Headstyle.SetFont(font);
            foreach (DataColumn column in dtSources[k].Columns)
            {
                margeColIndex[column.Ordinal] = 1;
                margeColValue[column.Ordinal] = "";
                ICell cell = dataRow.CreateCell(column.Ordinal);//创建单元格
                cell.SetCellValue(column.ColumnName);//设置单元格的值
                dataRow.GetCell(column.Ordinal).CellStyle = Headstyle; //将新的样式赋给单元格
            }
            //填充内容
            for (int i = 0; i < dtSources[k].Rows.Count; i++)
            {
                dataRow = sheet.CreateRow(i + 1) as HSSFRow;
                for (int j = 0; j < dtSources[k].Columns.Count; j++)
                {
                    ICell newCell = dataRow.CreateCell(j);
                    bool canSetValue = false;
                    if (NeedMargeColumns.Length > 0 && (NeedMargeColumns.IndexOf("," + j.ToString() + ",") != -1)) //有需要合并的列,并且当前列需要合并              
                    {
                        if (margeColValue[j] == "")
                        {
                            canSetValue = true;
                            margeColIndex[j] = i + 1;
                            margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                        }
                        else if (margeColValue[j] != dtSources[k].Rows[i][j].ToString())//不同的时候需要更新原来储存的值，并重新设置合并
                        {
                            canSetValue = true;
                            //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列
                            sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i, j, j));
                            margeColIndex[j] = i + 1;
                            margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                        }
                    }
                    else
                    {
                        canSetValue = true;
                    }
                    if (canSetValue)
                    {
                        //需要合并的列，1.第一行/最后一行,2.上一行值不同，下一行值相同，则给当前单元格赋值
                        switch (dtSources[k].Columns[j].DataType.ToString())
                        {
                            case "System.String"://字符串类型   
                                newCell.SetCellValue(dtSources[k].Rows[i][j].ToString());
                                break;
                            case "System.DateTime"://日期类型   
                                DateTime dateV;
                                DateTime.TryParse(dtSources[k].Rows[i][j].ToString(), out dateV);
                                newCell.SetCellValue(dateV);
                                newCell.CellStyle = dateStyle;//格式化显示   
                                break;
                            case "System.Boolean"://布尔型   
                                bool boolV = false;
                                bool.TryParse(dtSources[k].Rows[i][j].ToString(), out boolV);
                                newCell.SetCellValue(boolV);
                                break;
                            case "System.Int16"://整型   
                            case "System.Int32":
                            case "System.Int64":
                            case "System.Byte":
                                int intV = 0;
                                int.TryParse(dtSources[k].Rows[i][j].ToString(), out intV);
                                newCell.SetCellValue(intV);
                                break;
                            case "System.Decimal"://浮点型   
                            case "System.Double":
                                double doubV = 0;
                                double.TryParse(dtSources[k].Rows[i][j].ToString(), out doubV);
                                newCell.SetCellValue(doubV);
                                break;
                            case "System.DBNull"://空值处理   
                                newCell.SetCellValue("");
                                break;
                            default:
                                newCell.SetCellValue("");
                                break;
                        }
                    }
                }
            }
        }
        //保存
        using (MemoryStream ms = new MemoryStream())
        {
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            if (SaveFile)
            {
                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
                System.IO.FileInfo fileInfo = new System.IO.FileInfo(strFileName);
                strFileName = fileInfo.Name;
            }
            else
            {
                System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + HttpUtility.UrlEncode(strFileName)));
                System.Web.HttpContext.Current.Response.AddHeader("Content-Length", ms.ToArray().Length.ToString());
                System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
                System.Web.HttpContext.Current.Response.Flush();
                ms.Close();
                ms.Dispose();
                System.Web.HttpContext.Current.Response.End();
            }
        }
    }
    /// <summary>
    /// 导出EXCEL,可以导出多个sheet
    /// </summary>
    /// <param name="dtSources">原始数据表</param>
    /// <param name="strFileName">文件名</param>
    /// <param name="SaveFile">是否需要保存此文件</param>
    /// <param name="NeedMargeColumns">需要合并的列，如：3,5（表示第三列和第五列各自合并单元格）</param>
    public static void ExportDTtoExcel(DataTable[] dtSources, string strFileName, bool SaveFile, string NeedMargeColumns)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        if (NeedMargeColumns.Length > 0)
        {
            NeedMargeColumns = "," + NeedMargeColumns + ",";
        }
        HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
        for (int k = 0; k < dtSources.Length; k++)
        {
            int[] margeColIndex = new int[dtSources[k].Columns.Count];//保存合并列的起始行
            string[] margeColValue = new string[dtSources[k].Columns.Count];//保存合并列对应的上一个值      
            HSSFSheet sheet = workbook.CreateSheet(dtSources[k].TableName.ToString()) as HSSFSheet;
            //填充表头
            HSSFRow dataRow = sheet.CreateRow(0) as HSSFRow;
            ICellStyle Headstyle = workbook.CreateCellStyle();
            //设置单元格的样式：水平对齐居中
            Headstyle.Alignment = HorizontalAlignment.Center;
            //新建一个字体样式对象
            IFont font = workbook.CreateFont();
            //设置字体加粗样式
            font.Boldweight = short.MaxValue;
            //使用SetFont方法将字体样式添加到单元格样式中 
            Headstyle.SetFont(font);

            ICellStyle Rowstyle = workbook.CreateCellStyle();
            //设置单元格的样式：垂直对齐居中
            Rowstyle.VerticalAlignment = VerticalAlignment.Justify;

            //取得列宽
            int[] arrColWidth = new int[dtSources[k].Columns.Count];
            foreach (DataColumn item in dtSources[k].Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
                margeColIndex[item.Ordinal] = 1;
                margeColValue[item.Ordinal] = "";
            }
            for (int i = 0; i < dtSources[k].Rows.Count; i++)
            {
                for (int j = 0; j < dtSources[k].Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSources[k].Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            foreach (DataColumn column in dtSources[k].Columns)
            {
                ICell cell = dataRow.CreateCell(column.Ordinal);//创建单元格
                cell.SetCellValue(column.ColumnName);//设置单元格的值
                dataRow.GetCell(column.Ordinal).CellStyle = Headstyle; //将新的样式赋给单元格
                //设置列宽
                //sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                if (arrColWidth[column.Ordinal] > 255)
                {
                    arrColWidth[column.Ordinal] = 254;
                }
                else
                {
                    sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                }
            }
            //填充内容
            for (int i = 0; i < dtSources[k].Rows.Count; i++)
            {
                dataRow = sheet.CreateRow(i + 1) as HSSFRow;
                for (int j = 0; j < dtSources[k].Columns.Count; j++)
                {
                    ICell newCell = dataRow.CreateCell(j);
                    bool canSetValue = false;
                    if (NeedMargeColumns.Length > 0 && (NeedMargeColumns.IndexOf("," + j.ToString() + ",") != -1)) //有需要合并的列,并且当前列需要合并              
                    {
                        if (margeColValue[j] == "")
                        {
                            canSetValue = true;
                            margeColIndex[j] = i + 1;
                            margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                        }
                        else if (margeColValue[j] != dtSources[k].Rows[i][j].ToString())//不同的时候需要更新原来储存的值，并重新设置合并
                        {
                            canSetValue = true;
                            //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列
                            sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i, j, j));
                            margeColIndex[j] = i + 1;
                            margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                            newCell.CellStyle = Rowstyle;
                        }
                        else if (i == dtSources[k].Rows.Count - 1 && i != 0)//最后一行强制合并
                        {
                            //值相同本来是不用做任何事，但是最后一行，则需要合并
                            sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i + 1, j, j));
                            newCell.CellStyle = Rowstyle;
                        }
                    }
                    else
                    {
                        canSetValue = true;
                    }
                    if (canSetValue)
                    {
                        //需要合并的列，1.第一行/最后一行,2.上一行值不同，下一行值相同，则给当前单元格赋值
                        switch (dtSources[k].Columns[j].DataType.ToString())
                        {
                            case "System.String"://字符串类型   
                                newCell.SetCellValue(dtSources[k].Rows[i][j].ToString());
                                break;
                            case "System.DateTime"://日期类型   
                                DateTime dateV;
                                DateTime.TryParse(dtSources[k].Rows[i][j].ToString(), out dateV);
                                newCell.SetCellValue(dateV);
                                newCell.CellStyle = dateStyle;//格式化显示   
                                break;
                            case "System.Boolean"://布尔型   
                                bool boolV = false;
                                bool.TryParse(dtSources[k].Rows[i][j].ToString(), out boolV);
                                newCell.SetCellValue(boolV);
                                break;
                            case "System.Int16"://整型   
                            case "System.Int32":
                            case "System.Int64":
                            case "System.Byte":
                                int intV = 0;
                                int.TryParse(dtSources[k].Rows[i][j].ToString(), out intV);
                                newCell.SetCellValue(intV);
                                break;
                            case "System.Decimal"://浮点型   
                            case "System.Double":
                                double doubV = 0;
                                double.TryParse(dtSources[k].Rows[i][j].ToString(), out doubV);
                                newCell.SetCellValue(doubV);
                                break;
                            case "System.DBNull"://空值处理   
                                newCell.SetCellValue("");
                                break;
                            default:
                                newCell.SetCellValue("");
                                break;
                        }
                    }
                }
            }
        }
        //保存
        using (MemoryStream ms = new MemoryStream())
        {
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            if (SaveFile)
            {
                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
                System.IO.FileInfo fileInfo = new System.IO.FileInfo(strFileName);
                strFileName = fileInfo.Name;
            }
            System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + HttpUtility.UrlEncode(strFileName)));
            System.Web.HttpContext.Current.Response.AddHeader("Content-Length", ms.ToArray().Length.ToString());
            System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
            System.Web.HttpContext.Current.Response.Flush();
            ms.Close();
            ms.Dispose();
            System.Web.HttpContext.Current.Response.End();
        }
    }
    /// <summary>
    /// 导出EXCEL,可以导出多个sheet
    /// </summary>
    /// <param name="dtSources">原始数据表</param>
    /// <param name="strFileName">文件名</param>
    /// <param name="SaveFile">是否需要保存此文件</param>
    /// <param name="NeedMargeColumns">需要合并的列，如：3,5（表示第三列和第五列各自合并单元格）或者3,3:5（表示第三列合并，然后第五列合并时参考第三列再合并）</param>
    public static void ExportDTtoExcelExt(DataTable[] dtSources, string strFileName, bool SaveFile, string NeedMargeColumns)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        if (NeedMargeColumns.Length > 0)
        {
            NeedMargeColumns = "," + NeedMargeColumns + ",";
        }
        HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");
        for (int k = 0; k < dtSources.Length; k++)
        {
            int[] margeColIndex = new int[dtSources[k].Columns.Count];//保存合并列的起始行
            string[] margeColValue = new string[dtSources[k].Columns.Count];//保存合并列对应的上一个值      
            HSSFSheet sheet = workbook.CreateSheet(dtSources[k].TableName.ToString()) as HSSFSheet;
            //填充表头
            HSSFRow dataRow = sheet.CreateRow(0) as HSSFRow;
            ICellStyle Headstyle = workbook.CreateCellStyle();
            //设置单元格的样式：水平对齐居中
            Headstyle.Alignment = HorizontalAlignment.Center;
            //新建一个字体样式对象
            IFont font = workbook.CreateFont();
            //设置字体加粗样式
            font.Boldweight = short.MaxValue;
            //使用SetFont方法将字体样式添加到单元格样式中 
            Headstyle.SetFont(font);

            ICellStyle Rowstyle = workbook.CreateCellStyle();
            //设置单元格的样式：垂直对齐居中
            Rowstyle.VerticalAlignment = VerticalAlignment.Justify;

            //取得列宽
            int[] arrColWidth = new int[dtSources[k].Columns.Count];
            foreach (DataColumn item in dtSources[k].Columns)
            {
                arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
                margeColIndex[item.Ordinal] = 1;
                margeColValue[item.Ordinal] = "";
            }
            for (int i = 0; i < dtSources[k].Rows.Count; i++)
            {
                for (int j = 0; j < dtSources[k].Columns.Count; j++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSources[k].Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            foreach (DataColumn column in dtSources[k].Columns)
            {
                ICell cell = dataRow.CreateCell(column.Ordinal);//创建单元格
                cell.SetCellValue(column.ColumnName);//设置单元格的值
                dataRow.GetCell(column.Ordinal).CellStyle = Headstyle; //将新的样式赋给单元格
                                                                       //设置列宽
                                                                       //sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);

                if (arrColWidth[column.Ordinal] >= 255)
                {
                    arrColWidth[column.Ordinal] = 254;
                }
                else
                {
                    sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                }
            }
            //填充内容
            for (int i = 0; i < dtSources[k].Rows.Count; i++)
            {
                dataRow = sheet.CreateRow(i + 1) as HSSFRow;
                for (int j = 0; j < dtSources[k].Columns.Count; j++)
                {
                    ICell newCell = dataRow.CreateCell(j);
                    bool canSetValue = false;
                    if (NeedMargeColumns.Length > 0 && (NeedMargeColumns.IndexOf("," + j.ToString() + ",") != -1 || NeedMargeColumns.IndexOf(":" + j.ToString() + ",") != -1)) //有需要合并的列,并且当前列需要合并              
                    {
                        if (margeColValue[j] == "")
                        {
                            canSetValue = true;
                            margeColIndex[j] = i + 1;
                            margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                        }
                        else if (NeedMargeColumns.IndexOf("," + j.ToString() + ",") != -1)//单独列合并
                        {
                            if (margeColValue[j] != dtSources[k].Rows[i][j].ToString())//不同的时候需要更新原来储存的值，并重新设置合并
                            {
                                canSetValue = true;
                                //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列
                                sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i, j, j));
                                margeColIndex[j] = i + 1;
                                margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                                newCell.CellStyle = Rowstyle;
                            }
                            else if (i == dtSources[k].Rows.Count - 1 && i != 0)//最后一行强制合并
                            {
                                //值相同本来是不用做任何事，但是最后一行，则需要合并
                                sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i + 1, j, j));
                                newCell.CellStyle = Rowstyle;
                            }
                        }
                        else//参考前列合并
                        {
                            //获取前列
                            int refercol = 0;
                            string[] MargeCols = NeedMargeColumns.Split(',');
                            for (int dd = 0; dd < MargeCols.Length; dd++)
                            {
                                if (MargeCols[dd].Length > 0 && ("," + MargeCols[dd] + ",").IndexOf(":" + j.ToString() + ",") != -1)
                                {
                                    refercol = Convert.ToInt32(MargeCols[dd].Substring(0, MargeCols[dd].IndexOf(":")));
                                    break;
                                }
                            }
                            if (dtSources[k].Rows[i - 1][refercol].ToString() != dtSources[k].Rows[i][refercol].ToString())
                            {
                                canSetValue = true;
                                //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列
                                sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i, j, j));
                                margeColIndex[j] = i + 1;
                                margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                                newCell.CellStyle = Rowstyle;
                            }
                            else if (margeColValue[j] != dtSources[k].Rows[i][j].ToString())//不同的时候需要更新原来储存的值，并重新设置合并
                            {
                                canSetValue = true;
                                //CellRangeAddress四个参数为：起始行，结束行，起始列，结束列
                                sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i, j, j));
                                margeColIndex[j] = i + 1;
                                margeColValue[j] = dtSources[k].Rows[i][j].ToString();
                                newCell.CellStyle = Rowstyle;
                            }
                            else if (i == dtSources[k].Rows.Count - 1 && i != 0)//最后一行强制合并
                            {
                                //值相同本来是不用做任何事，但是最后一行，则需要合并
                                sheet.AddMergedRegion(new CellRangeAddress(margeColIndex[j], i + 1, j, j));
                                newCell.CellStyle = Rowstyle;
                            }
                        }
                    }
                    else
                    {
                        canSetValue = true;
                    }
                    if (canSetValue)
                    {
                        #region 需要合并的列，1.第一行/最后一行,2.上一行值不同，下一行值相同，则给当前单元格赋值
                        switch (dtSources[k].Columns[j].DataType.ToString())
                        {
                            case "System.String"://字符串类型   
                                newCell.SetCellValue(dtSources[k].Rows[i][j].ToString());
                                break;
                            case "System.DateTime"://日期类型   
                                DateTime dateV;
                                DateTime.TryParse(dtSources[k].Rows[i][j].ToString(), out dateV);
                                newCell.SetCellValue(dateV);
                                newCell.CellStyle = dateStyle;//格式化显示   
                                break;
                            case "System.Boolean"://布尔型   
                                bool boolV = false;
                                bool.TryParse(dtSources[k].Rows[i][j].ToString(), out boolV);
                                newCell.SetCellValue(boolV);
                                break;
                            case "System.Int16"://整型   
                            case "System.Int32":
                            case "System.Int64":
                            case "System.Byte":
                                int intV = 0;
                                int.TryParse(dtSources[k].Rows[i][j].ToString(), out intV);
                                newCell.SetCellValue(intV);
                                break;
                            case "System.Decimal"://浮点型   
                            case "System.Double":
                                double doubV = 0;
                                double.TryParse(dtSources[k].Rows[i][j].ToString(), out doubV);
                                newCell.SetCellValue(doubV);
                                break;
                            case "System.DBNull"://空值处理   
                                newCell.SetCellValue("");
                                break;
                            default:
                                newCell.SetCellValue("");
                                break;
                        }
                        #endregion
                    }
                }
            }
        }
        //保存
        using (MemoryStream ms = new MemoryStream())
        {
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            if (SaveFile)
            {
                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
                System.IO.FileInfo fileInfo = new System.IO.FileInfo(strFileName);
                strFileName = fileInfo.Name;
            }
            System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + HttpUtility.UrlEncode(strFileName)));
            System.Web.HttpContext.Current.Response.AddHeader("Content-Length", ms.ToArray().Length.ToString());
            System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
            System.Web.HttpContext.Current.Response.Flush();
            ms.Close();
            ms.Dispose();
            System.Web.HttpContext.Current.Response.End();
        }
    }
    #endregion

    #region 从excel中将数据导出到datatable
    /// <summary>读取excel
    /// 默认第一行为标头
    /// </summary>
    /// <param name="strFileName">excel文档路径</param>
    /// <returns></returns>
    public static DataTable ImportExceltoDt(string strFileName)
    {
        DataTable dt = new DataTable();
        IWorkbook wk = null;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(file);
            else
                wk = new HSSFWorkbook(file);
        }
        ISheet sheet = wk.GetSheetAt(0) as ISheet;
        dt = ImportDt(sheet, 0, true);
        return dt;
    }

    /// <summary>
    /// 读取excel
    /// </summary>
    /// <param name="strFileName">excel文件路径</param>
    /// <param name="sheet">需要导出的sheet</param>
    /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
    /// <returns></returns>
    public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex)
    {
        DataTable dt = new DataTable();
        IWorkbook wk = null;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(file);
            else
                wk = new HSSFWorkbook(file);
        }
        ISheet sheet = wk.GetSheet(SheetName) as ISheet;
        dt = ImportDt(sheet, HeaderRowIndex, true);
        //ExcelFileStream.Close();
        wk = null;
        sheet = null;
        return dt;
    }

    /// <summary>
    /// 读取excel
    /// </summary>
    /// <param name="strFileName">excel文件路径</param>
    /// <param name="sheet">需要导出的sheet序号</param>
    /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
    /// <returns></returns>
    public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex)
    {
        DataTable dt = new DataTable();
        IWorkbook wk = null;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(file);
            else
                wk = new HSSFWorkbook(file);
        }
        ISheet sheet = wk.GetSheetAt(SheetIndex) as ISheet;
        dt = ImportDt(sheet, HeaderRowIndex, true);
        //ExcelFileStream.Close();
        wk = null;
        sheet = null;
        return dt;
    }

    /// <summary>
    /// 读取excel
    /// </summary>
    /// <param name="strFileName">excel文件路径</param>
    /// <param name="sheet">需要导出的sheet</param>
    /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
    /// <returns></returns>
    public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex, bool needHeader)
    {
        DataTable dt = new DataTable();
        IWorkbook wk = null;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(file);
            else
                wk = new HSSFWorkbook(file);
        }
        ISheet sheet = wk.GetSheet(SheetName) as ISheet;
        dt = ImportDt(sheet, HeaderRowIndex, needHeader);
        wk = null;
        sheet = null;
        return dt;
    }

    /// <summary>
    /// 读取excel
    /// </summary>
    /// <param name="strFileName">excel文件路径</param>
    /// <param name="sheet">需要导出的sheet序号</param>
    /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
    /// <returns></returns>
    public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex, bool needHeader)
    {
        DataTable dt = new DataTable();
        IWorkbook wk = null;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(file);
            else
                wk = new HSSFWorkbook(file);
        }
        ISheet sheet = wk.GetSheetAt(SheetIndex) as ISheet;
        dt = ImportDt(sheet, HeaderRowIndex, needHeader);
        wk = null;
        sheet = null;
        return dt;
    }

    /// <summary>
    /// 将制定sheet中的数据导出到datatable中
    /// </summary>
    /// <param name="sheet">需要导出的sheet</param>
    /// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
    /// <returns></returns>
    static DataTable ImportDt(ISheet sheet, int HeaderRowIndex, bool needHeader)
    {
        DataTable table = new DataTable();
        IRow headerRow;
        int cellCount;
        try
        {
            if (HeaderRowIndex < 0 || !needHeader)
            {
                headerRow = sheet.GetRow(0) as IRow;
                cellCount = headerRow.LastCellNum;

                for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                {
                    DataColumn column = new DataColumn(Convert.ToString("F" + (i + 1).ToString()));
                    table.Columns.Add(column);
                }
            }
            else
            {
                headerRow = sheet.GetRow(HeaderRowIndex) as IRow;
                cellCount = headerRow.LastCellNum;

                for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
                {
                    if (headerRow.GetCell(i) == null)
                    {
                        if (table.Columns.IndexOf(Convert.ToString(i)) > 0)
                        {
                            DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                            table.Columns.Add(column);
                        }
                        else
                        {
                            DataColumn column = new DataColumn(Convert.ToString(i));
                            table.Columns.Add(column);
                        }

                    }
                    else if (table.Columns.IndexOf(headerRow.GetCell(i).ToString()) > 0)
                    {
                        DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
                        table.Columns.Add(column);
                    }
                    else
                    {
                        DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
                        table.Columns.Add(column);
                    }
                }
            }
            int rowCount = sheet.LastRowNum;
            for (int i = (HeaderRowIndex + 1); i <= sheet.LastRowNum; i++)
            {
                try
                {
                    IRow row;
                    if (sheet.GetRow(i) == null)
                    {
                        row = sheet.CreateRow(i) as IRow;
                    }
                    else
                    {
                        row = sheet.GetRow(i) as IRow;
                    }

                    DataRow dataRow = table.NewRow();

                    for (int j = row.FirstCellNum; j <= cellCount; j++)
                    {
                        try
                        {
                            if (row.GetCell(j) != null)
                            {
                                switch (row.GetCell(j).CellType)
                                {
                                    case CellType.String:
                                        string str = row.GetCell(j).StringCellValue;
                                        if (str != null && str.Length > 0)
                                        {
                                            dataRow[j] = str.ToString();
                                        }
                                        else
                                        {
                                            dataRow[j] = null;
                                        }
                                        break;
                                    case CellType.Numeric:
                                        if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
                                        {
                                            dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
                                        }
                                        else
                                        {
                                            dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
                                        }
                                        break;
                                    case CellType.Boolean:
                                        dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                        break;
                                    case CellType.Error:
                                        dataRow[j] = row.GetCell(j).ErrorCellValue;
                                        break;
                                    case CellType.Formula:
                                        switch (row.GetCell(j).CachedFormulaResultType)
                                        {
                                            case CellType.String:
                                                string strFORMULA = row.GetCell(j).StringCellValue;
                                                if (strFORMULA != null && strFORMULA.Length > 0)
                                                {
                                                    dataRow[j] = strFORMULA.ToString();
                                                }
                                                else
                                                {
                                                    dataRow[j] = null;
                                                }
                                                break;
                                            case CellType.Numeric:
                                                dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
                                                break;
                                            case CellType.Boolean:
                                                dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
                                                break;
                                            case CellType.Error:
                                                dataRow[j] = row.GetCell(j).ErrorCellValue;
                                                break;
                                            default:
                                                dataRow[j] = "";
                                                break;
                                        }
                                        break;
                                    default:
                                        dataRow[j] = "";
                                        break;
                                }
                            }
                        }
                        catch (Exception)
                        {
                            //wl.WriteLogs(exception.ToString());
                        }
                    }
                    table.Rows.Add(dataRow);
                }
                catch (Exception)
                {
                    //wl.WriteLogs(exception.ToString());
                }
            }
        }
        catch (Exception)
        {
            //wl.WriteLogs(exception.ToString());
        }
        return table;
    }
    #endregion

    #region 更新excel中的数据
    /// <summary>
    /// 更新Excel表格
    /// </summary>
    /// <param name="outputFile">需更新的excel表格路径</param>
    /// <param name="sheetname">sheet名</param>
    /// <param name="updateData">需更新的数据</param>
    /// <param name="coluid">需更新的列号</param>
    /// <param name="rowid">需更新的开始行号</param>
    public static void UpdateExcel(string outputFile, int sheetIndex, string[] updateData, int coluid, int rowid)
    {
        FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

        HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
        ISheet sheet1 = hssfworkbook.GetSheetAt(sheetIndex);
        for (int i = 0; i < updateData.Length; i++)
        {
            try
            {
                if (sheet1.GetRow(i + rowid) == null)
                {
                    sheet1.CreateRow(i + rowid);
                }
                if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                {
                    sheet1.GetRow(i + rowid).CreateCell(coluid);
                }

                sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
            }
            catch (Exception ex)
            {
                // wl.WriteLogs(ex.ToString());
                throw;
            }
        }
        try
        {
            readfile.Close();
            FileStream writefile = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
            hssfworkbook.Write(writefile);
            writefile.Close();
        }
        catch (Exception ex)
        {
            // wl.WriteLogs(ex.ToString());
        }

    }

    /// <summary>
    /// 更新Excel表格
    /// </summary>
    /// <param name="outputFile">需更新的excel表格路径</param>
    /// <param name="sheetname">sheet名</param>
    /// <param name="updateData">需更新的数据</param>
    /// <param name="coluids">需更新的列号</param>
    /// <param name="rowid">需更新的开始行号</param>
    public static void UpdateExcel(string outputFile, int sheetIndex, string[][] updateData, int[] coluids, int rowid)
    {
        FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

        HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
        readfile.Close();
        ISheet sheet1 = hssfworkbook.GetSheetAt(sheetIndex);
        for (int j = 0; j < coluids.Length; j++)
        {
            for (int i = 0; i < updateData[j].Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                    }
                    sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                }
                catch (Exception ex)
                {
                    // wl.WriteLogs(ex.ToString());
                }
            }
        }
        try
        {
            FileStream writefile = new FileStream(outputFile, FileMode.Create);
            hssfworkbook.Write(writefile);
            writefile.Close();
        }
        catch (Exception ex)
        {
            //wl.WriteLogs(ex.ToString());
        }
    }

    /// <summary>
    /// 更新Excel表格
    /// </summary>
    /// <param name="outputFile">需更新的excel表格路径</param>
    /// <param name="sheetname">sheet名</param>
    /// <param name="updateData">需更新的数据</param>
    /// <param name="coluid">需更新的列号</param>
    /// <param name="rowid">需更新的开始行号</param>
    public static void UpdateExcel(string outputFile, int sheetIndex, double[] updateData, int coluid, int rowid)
    {
        FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

        HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
        ISheet sheet1 = hssfworkbook.GetSheetAt(sheetIndex);
        for (int i = 0; i < updateData.Length; i++)
        {
            try
            {
                if (sheet1.GetRow(i + rowid) == null)
                {
                    sheet1.CreateRow(i + rowid);
                }
                if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
                {
                    sheet1.GetRow(i + rowid).CreateCell(coluid);
                }

                sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
            }
            catch (Exception ex)
            {
                //wl.WriteLogs(ex.ToString());
                throw;
            }
        }
        try
        {
            readfile.Close();
            FileStream writefile = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
            hssfworkbook.Write(writefile);
            writefile.Close();
        }
        catch (Exception ex)
        {
            //wl.WriteLogs(ex.ToString());
        }

    }

    /// <summary>
    /// 更新Excel表格
    /// </summary>
    /// <param name="outputFile">需更新的excel表格路径</param>
    /// <param name="sheetname">sheet名</param>
    /// <param name="updateData">需更新的数据</param>
    /// <param name="coluids">需更新的列号</param>
    /// <param name="rowid">需更新的开始行号</param>
    public static void UpdateExcel(string outputFile, int sheetIndex, double[][] updateData, int[] coluids, int rowid)
    {
        FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);

        HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
        readfile.Close();
        ISheet sheet1 = hssfworkbook.GetSheetAt(sheetIndex);
        for (int j = 0; j < coluids.Length; j++)
        {
            for (int i = 0; i < updateData[j].Length; i++)
            {
                try
                {
                    if (sheet1.GetRow(i + rowid) == null)
                    {
                        sheet1.CreateRow(i + rowid);
                    }
                    if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
                    {
                        sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
                    }
                    sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
                }
                catch (Exception ex)
                {
                    //wl.WriteLogs(ex.ToString());
                }
            }
        }
        try
        {
            FileStream writefile = new FileStream(outputFile, FileMode.Create);
            hssfworkbook.Write(writefile);
            writefile.Close();
        }
        catch (Exception ex)
        {
            //wl.WriteLogs(ex.ToString());
        }
    }

    #endregion

    public static int GetSheetNumber(string outputFile)
    {
        int number = 0;
        try
        {
            IWorkbook wk = null;
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
            if (outputFile.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(readfile);
            else
                wk = new HSSFWorkbook(readfile);
            number = wk.NumberOfSheets;
        }
        catch (Exception)
        {
            //wl.WriteLogs(exception.ToString());
        }
        return number;
    }

    public static ArrayList GetSheetName(string outputFile)
    {
        ArrayList arrayList = new ArrayList();
        try
        {
            IWorkbook wk = null;
            FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
            if (outputFile.EndsWith(".xlsx"))
                wk = new XSSFWorkbook(readfile);
            else
                wk = new HSSFWorkbook(readfile);

            for (int i = 0; i < wk.NumberOfSheets; i++)
            {
                arrayList.Add(wk.GetSheetName(i));
            }

            //var newFile2 = @"newbook.core.docx";
            //using (var fs = new FileStream(newFile2, FileMode.Create, FileAccess.Write))
            //{
            //    XWPFDocument doc = new XWPFDocument();
            //    var p0 = doc.CreateParagraph();
            //    p0.Alignment = ParagraphAlignment.CENTER;
            //    XWPFRun r0 = p0.CreateRun();
            //    r0.FontFamily = "microsoft yahei";
            //    r0.FontSize = 18;
            //    r0.IsBold = true;
            //    r0.SetText("This is title");

            //    var p1 = doc.CreateParagraph();
            //    p1.Alignment = ParagraphAlignment.LEFT;
            //    p1.IndentationFirstLine = 500;
            //    XWPFRun r1 = p1.CreateRun();
            //    r1.FontFamily = "·ÂËÎ";
            //    r1.FontSize = 12;
            //    r1.IsBold = true;
            //    r1.SetText("This is content, content content content content content content content content content");

            //    doc.Write(fs);
            //}
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return arrayList;
    }

    public static bool isNumeric(String message, out double result)
    {
        Regex rex = new Regex(@"^[-]?d+[.]?d*$");
        result = -1;
        if (rex.IsMatch(message))
        {
            result = double.Parse(message);
            return true;
        }
        else
            return false;
    }

    /// <summary>
    /// 根据其他行的内容合并ISheet中某列相同信息的行（单元格）,2列相等
    /// </summary>
    /// <param name="sheet"></param>
    /// <param name="StartRow">合并的开始行</param>
    /// <param name="cols">合并列</param>
    /// <param name="precols">参考列</param>
    public static void GroupCol(ISheet sheet, int StartRow, int cols, int precols)
    {
        if (sheet.PhysicalNumberOfRows < StartRow + 1 || cols > sheet.GetRow(0).PhysicalNumberOfCells - 1)
        {
            return;
        }
        int RowNum = 0;
        ICell oldPreCell = sheet.GetRow(StartRow).GetCell(precols);
        ICell oldCell = sheet.GetRow(StartRow).GetCell(cols);
        int i = StartRow + 1;
        while (i < sheet.PhysicalNumberOfRows)
        {

            ICell PreCell = sheet.GetRow(i).GetCell(precols);
            ICell Cell = sheet.GetRow(i).GetCell(cols);
            if (oldCell.ToString() == Cell.ToString() && oldPreCell.ToString() == PreCell.ToString())
            {
                //Cell.SetCellValue("");
                RowNum++;
            }
            else
            {
                if (RowNum > 0)
                {
                    CellRangeAddress region = new CellRangeAddress(StartRow, StartRow + RowNum, cols, cols);
                    sheet.AddMergedRegion(region);
                    StartRow += RowNum;
                }
                oldPreCell = PreCell;
                oldCell = Cell;
                StartRow += 1;
                RowNum = 0;
            }
            i++;
        }
        if (RowNum > 0 && i == sheet.PhysicalNumberOfRows)
        {
            CellRangeAddress region = new CellRangeAddress(StartRow, StartRow + RowNum, cols, cols);
            sheet.AddMergedRegion(region);
            StartRow += RowNum;
        }
    }

    /// <summary>
    /// 自动设置Excel列宽，行高
    /// </summary>
    /// <param name="sheet">Excel表</param>
    public static void AutoSizeColumns(ISheet sheet)
    {
        int RowNum = sheet.LastRowNum;
        int ColumnNum = sheet.GetRow(0).LastCellNum;
        int HeightValue = 0;
        for (int i = 0; i < ColumnNum; i++)
        {
            int columnWidth = sheet.GetColumnWidth(i) / 256;//获取当前列宽度  
            for (int j = 1; j <= RowNum; j++)//在这一列上循环行  
            {
                IRow currentRow = sheet.GetRow(j);
                ICell currentCell = currentRow.GetCell(i);
                int length = Encoding.UTF8.GetBytes(currentCell.ToString()).Length;//获取当前单元格的内容宽度  
                if (columnWidth < length + 1)
                    columnWidth = length + 1;
                if (columnWidth > 40)
                    columnWidth = 40;

                if (length > HeightValue) HeightValue = length;
                currentRow.HeightInPoints = 20 * (HeightValue / 60 + 1);//高度自适应
            }
            sheet.SetColumnWidth(i, columnWidth * 256);
        }
    }

    public static void AutoSetType(ICell newCell, DataColumn column, DataRow row)
    {
        string drValue = row[column].ToString();
        switch (column.DataType.ToString())
        {
            case "System.String"://字符串类型
                                 //double result;
                                 //if (double.TryParse(drValue, out result) && result.ToString().Length != 15)
                                 //    newCell.SetCellValue(result);
                                 //else
                newCell.SetCellValue(drValue);
                break;
            case "System.DateTime"://日期类型   
                DateTime dateV;
                DateTime.TryParse(drValue, out dateV);
                newCell.SetCellValue(dateV);
                break;
            case "System.Boolean"://布尔型   
                bool boolV = false;
                bool.TryParse(drValue, out boolV);
                newCell.SetCellValue(boolV);
                break;
            case "System.Int16"://整型   
            case "System.Int32":
            case "System.Int64":
            case "System.Byte":
                int intV = 0;
                int.TryParse(drValue, out intV);
                if (intV != 0)
                    newCell.SetCellValue(intV);
                break;
            case "System.Decimal"://浮点型   
            case "System.Double":
                double doubV = 0;
                double.TryParse(drValue, out doubV);
                if (doubV != 0)
                    newCell.SetCellValue(doubV);
                break;
            case "System.DBNull"://空值处理   
                newCell.SetCellValue("");
                break;
            default:
                newCell.SetCellValue("");
                break;
        }
    }



    /// <summary>
    /// DataTable导出到Excel文件 两行表头
    /// </summary>
    /// <param name="dt_Title">表头表格</param>
    /// <param name="dtSource">源DataTable</param>
    /// <param name="sFileName">文件名</param>
    /// <param name="SaveFile">是否需保存</param>
    /// <param name="SheetName">Sheet名</param>
    /// <param name="ColumnProperty">列属性集,多个属性集以"|"分隔,值以","分隔,范例:"Merge,0,0|Align,2,right|Width,4,100|DataType,5,double"</param>

    public static void ExportDTtoExcel_2Title(DataTable dt_Title, DataTable dtSource, string sFileName, bool SaveFile, string SheetName, string ColumnProperty)
    {
        using (MemoryStream ms = ExportDT_2Title(dt_Title, dtSource, SheetName, ColumnProperty))
        {
            if (SaveFile)
            {
                using (FileStream fs = new FileStream(sFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
                System.IO.FileInfo fileInfo = new System.IO.FileInfo(sFileName);
                sFileName = fileInfo.Name;
            }
            System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + HttpUtility.UrlEncode(sFileName)));
            System.Web.HttpContext.Current.Response.AddHeader("Content-Length", ms.ToArray().Length.ToString());
            System.Web.HttpContext.Current.Response.BinaryWrite(ms.ToArray());
            System.Web.HttpContext.Current.Response.Flush();
            ms.Close();
            ms.Dispose();
            System.Web.HttpContext.Current.Response.End();
        }
    }
    /// <summary>
    /// DataTable导出到Excel的MemoryStream
    /// </summary>
    /// <param name="dtSource">源DataTable</param>
    public static MemoryStream ExportDT_2Title(DataTable dt_Title, DataTable dtSource, string SheetName, string ColumnProperty)
    {
        using (MemoryStream ms = new MemoryStream())
        {
            HSSFWorkbook workbook = ExportWorkbook_2Title(dt_Title, dtSource, SheetName, ColumnProperty);
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            return ms;
        }
    }
    public static HSSFWorkbook ExportWorkbook_2Title(DataTable dt_Title, DataTable dtSource, string SheetName, string ColumnProperty)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        if (SheetName == null || SheetName == "") SheetName = "Sheet1";
        HSSFSheet sheet = workbook.CreateSheet(SheetName) as HSSFSheet;

        // 标题样式
        HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        headStyle.Alignment = HorizontalAlignment.Center;
        headStyle.VerticalAlignment = VerticalAlignment.Center;
        headStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
        headStyle.WrapText = true;
        HSSFFont font = workbook.CreateFont() as HSSFFont;
        font.Boldweight = (short)FontBoldWeight.Bold;
        headStyle.SetFont(font);

        //内容样式
        HSSFCellStyle cellStyle = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyle.CloneStyleFrom(headStyle);
        cellStyle.Alignment = HorizontalAlignment.Center;
        font = workbook.CreateFont() as HSSFFont;
        font.Boldweight = (short)FontBoldWeight.Normal;
        cellStyle.SetFont(font);
        HSSFCellStyle cellStyleLeft = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyleLeft.CloneStyleFrom(cellStyle);
        cellStyleLeft.Alignment = HorizontalAlignment.Left;
        HSSFCellStyle cellStyleRight = workbook.CreateCellStyle() as HSSFCellStyle;
        cellStyleRight.CloneStyleFrom(cellStyle);
        cellStyleRight.Alignment = HorizontalAlignment.Right;

        int rowIndex = 0;
        #region 列头及样式

        for (int i = 0; i < dt_Title.Rows.Count; i++)
        {
            HSSFRow headerRow = sheet.CreateRow(rowIndex) as HSSFRow;
            for (int j = 0; j < dt_Title.Columns.Count; j++)
            {
                headerRow.CreateCell(dt_Title.Columns[j].Ordinal).SetCellValue(dt_Title.Rows[i][j].ToString());
                headerRow.GetCell(dt_Title.Columns[j].Ordinal).CellStyle = headStyle;

            }
            rowIndex++;
        }
        for (int i = 0; i < dt_Title.Rows.Count; i++)
        {
            for (int m = 0; m < dt_Title.Columns.Count; m++)
            {
                int n = m + 1;
                while (n < dt_Title.Columns.Count)
                {
                    if (dt_Title.Rows[i][m].ToString() == dt_Title.Rows[i][n].ToString())
                    {
                        n++;
                    }
                    else if (n == dt_Title.Columns.Count)
                    {
                        break;
                    }
                    else
                    {
                        //合并同一行相同的列表头
                        sheet.AddMergedRegion(new CellRangeAddress(i, i, m, n - 1));
                        m = n - 1;
                        break;
                    }
                }
                if (n == dt_Title.Columns.Count)
                {
                    sheet.AddMergedRegion(new CellRangeAddress(i, i, m, n - 1));

                }
            }

        }
        for (int i = 0; i < dt_Title.Columns.Count; i++)
        {
            for (int m = 0; m < dt_Title.Rows.Count; m++)
            {
                int n = m + 1;
                while (n < dt_Title.Rows.Count)
                {
                    if (dt_Title.Rows[m][i].ToString() == dt_Title.Rows[n][i].ToString())
                    {
                        n++;
                    }
                    else if (n == dt_Title.Rows.Count)
                    {
                        break;
                    }
                    else
                    {
                        //合并同一列相同的行表头
                        sheet.AddMergedRegion(new CellRangeAddress(m, n - 1, i, i));
                        m = n - 1;
                        break;
                    }
                }
                if (n == dt_Title.Rows.Count)
                {
                    sheet.AddMergedRegion(new CellRangeAddress(m, n - 1, i, i));

                }
            }
        }




        //sheet.AddMergedRegion(new CellRangeAddress(0, 1, 1, 1));
        //sheet.AddMergedRegion(new CellRangeAddress(0, 1, 2, 2));
        #endregion

        foreach (DataRow row in dtSource.Rows)
        {
            #region 填充内容
            HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
            foreach (DataColumn column in dtSource.Columns)
            {
                HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
                newCell.CellStyle = cellStyle;
                AutoSetType(newCell, column, row);
            }

            #endregion
            rowIndex++;
        }
        AutoSizeColumns(sheet);

        if (ColumnProperty != null)
        {
            string[] ColumnArray = ColumnProperty.Split('|');
            foreach (string Column in ColumnArray)
            {
                string[] ValueArray = Column.Split(',');
                if (ValueArray.Length > 2)
                {
                    int cols = int.Parse(ValueArray[1]);
                    switch (ValueArray[0].ToString())
                    {
                        case "Merge":
                            int precols = 0;
                            int.TryParse(ValueArray[2], out precols);
                            GroupCol(sheet, 1, cols, precols);
                            break;
                        case "Width":
                            int columnWidth = 0;
                            int.TryParse(ValueArray[2], out columnWidth);
                            sheet.SetColumnWidth(cols, columnWidth * 256);
                            break;
                        case "Align":
                            string Value = ValueArray[2].ToString();
                            for (int j = 1; j <= sheet.LastRowNum; j++)
                            {
                                ICell currentCell = sheet.GetRow(j).GetCell(cols);
                                switch (Value)
                                {
                                    case "center":
                                        currentCell.CellStyle = cellStyle;
                                        break;
                                    case "left":
                                        currentCell.CellStyle = cellStyleLeft;
                                        break;
                                    case "right":
                                        currentCell.CellStyle = cellStyleRight;
                                        break;
                                }
                            }
                            break;
                        case "DataType":
                            string Value2 = ValueArray[2].ToString();
                            for (int j = 1; j <= sheet.LastRowNum; j++)
                            {
                                ICell currentCell = sheet.GetRow(j).GetCell(cols);
                                string drValue = currentCell.ToString();
                                switch (Value2)
                                {
                                    case "double":
                                        double result;
                                        if (double.TryParse(drValue, out result))
                                            currentCell.SetCellValue(result);
                                        break;
                                    case "string":
                                        currentCell.SetCellValue(drValue.ToString());
                                        break;
                                }
                            }
                            break;
                    }
                }
            }
        }
        return workbook;
    }

}