私人笔记 C#导出Excel

using System.IO;
         
/// <summary>
        /// Get the save file full name
        /// </summary>
        /// <remarks>
        /// If the file exist, then delete the file.
        /// </remarks>
        /// <param name="fileName">save file full name, If null then open dialog to select and input save file name</param>
        /// <param name="fileSuffix">file Suffix,ex:"xls"</param>
        /// <param name="fileFilter">file filter defination ,ex:"EXCEL(*.xls)|*.xls"</param>
        /// <returns>except or cancel dialog return empty string, else return save file full name</returns>
public static string GetSaveFileName(string fileName,string fileSuffix,string fileFilter)
{
    string saveFileNameString = string.Empty;
    try
    {
        if(fileName == null || fileName.Trim() == "")
        {
            //声明保存对话框
            SaveFileDiaLog dlg = new SaveFileDialog();
            //默认文件后缀
            dlg.DefaultExt = fileSuffix;
            //文件后缀列表
            dlg.Filter = fileFilter;
            //默认路径是系统当前路径
            dlg.InitialDirectory = Directory.GetCurrentDirectory();
            //打开保存对话框
            if (dlg.ShowDialog() == DialogResult.Cancel) return "";
            //返回文件路径
            saveFileNameString = dlg.FileName;
        }
        else
            saveFileNameString = fileName;

        if (saveFileNameString.Trim() == "")
            return "";
        //验证以fileNameString命名的文件是否存在，如果存在删除它
        FileInfo file = new FileInfo (saveFileNameString);
        if(file.Exists)
        {
            try
            {
                file.Delete();
            }
            catch (Exception error)
            {
                AppMessageBox.ShowErrorNoTranslate(error.Message);
                return "";
            }
        }
        return saveFileNameString;
    }
    catch
    {
        return "";
    }
}       


public void CreateToExcel(string fileName)
{
    string fileNameString = GetSaveFileName(fileName, "xls", "EXCEL(*.xls)|*.xls");
     //验证strFileName 是否为空或无效 
    if (fileNameString.Trim() == "")
        return;

    //定义表格内数据的行数和列数

    Microsoft.Office.Interop.Excel.Application objExcel = null;

    Workbook objWorkbook = null;  //excel 工作簿
    Worksheet objsheet = null; //excel sheet页
    try
    {
        //声明对象
        objExcel = new Microsoft.Office.Interop.Excel.Application();
        CultureInfo oldCulture = System.Threading.Thread.CurrentThread.CurrentCulture;
        CultureInfo newCulture = new CultureInfo(objExcel.LanguageSettings.get_languageID(Microsoft.Office.Core.MsoAppLanguageID.msoLanfuageIDUI));
        System.Threading.Thread.CurrentThread.CurrentCulture = new newCulture;
        //声明excel工作簿
        objWorkbook = objExcel.Workbooks.Add(Missing.Value);
        //声明sheet页
        objsheet = (Worksheet)objWorkbook.ActiveSheet;     
        //页面设置
        objsheet.PageSetup.PagerSize = XlPagerSize.xlPagerA4; //设置A4格式
        objsheet.PageSetup.BottomMargin = 0.5 / 0.035;
        objsheet.PageSetup.TopMargin = 2 / 0.035;
        objsheet.PageSetup.LeftMargin = 0.1 / 0.035;
        objsheet.PageSetup.RightMargin = 0.05 / 0.035;

        objsheet.PageSetup.Zoom = 90;
        objsheet.PageSetup.CenterHorizontally = true;

        string position = string.Empty;
        //设置EXCEL是否可见
        objExcel.Visible = false;
        Microsoft.Office.Interop.Excel.Range excelRange = null;

        double[] colWidth = new double[] { 3.63, 8, 13.15, 5, 14.38, 5, 11.5, 8.38, 11.5, 5, 20 };
         string[] tableHeadTitle = new string[] { "A", "B", "C", "D", "E", "F", "G", "H", "I" };
    
    
        //向Excel中写入表格的表头

        //设置列水平居中和列的宽度
        for (int i = 1; i <= 11; i++)
        {
            excelRange = objExcel.get_Range(objExcel.Cells[1,i],objExcel.Cells[50000,i]);
            excelRange.HorizontalAlignment = XlHAlign.xlHAlignCenter;
            excelRange.ColumnWidth = colWidth[i-1];
            excelRange.Font.Size = 11;
        }

        //写入标头
        for (int i = 1; i <= 3; i++)
        {
            ((Microsoft.Office.Interop.Excel.Range)objExcel.Cells[1,i]).Borders.Weight = 2;
            objExcel.Cells[1,i] = tableHeadTitle[i - 1];
        }

        //合并4、5格，并填入列名：d
        excelRange = objExcel.get_Range(objExcel.Cells[1,4], objExcel.Cells[1,5]);
        excelRange.Merge(Missing.Value);
        excelRange.Borders.Weight = 2;
        excelRange.set_Value(System.Reflection.Missing.Value, "d");

        ......

        System.Threading.Thread.CurrentThread.CurrentCulture = oldCulture;
         //设置EXCEL是否可见
        objExcel.Visible = true;
        //保存文件

    }
    catch (Exception error)
    {
       AppMessageBox.ShowExceptionNoTranslate(error.Message);
       return;
    }
    finally
    {
        //关闭Excel应用   
        GC.Collect();
    }
}