Epplus：导出Excel

看到其它大神的Epplus导出Excel，结合写出符合自己需求的将导出数据到Excel，给其它人参考一下，也可以学习http://www.cnblogs.com/caofangsheng/p/6149843.html#3576824灰太狼的梦想（大神）的教程。

视图：

<input type="button" value="订单导出" class="baseExport baseBtn" style="margin-right: 12px;" onclick="ExportToExcel()" />

<script>
function ExportToExcel() {
document.location = "/Order/ExportToExcel";
}
 <script/>

控制器：

public FileContentResult ExportToExcel()
{
var where = "SQL语句 ";
List<AmazonOrdersCollectView> Export = SQLHelper.GetCollectReader(where);//查出后台数据
string[] columns = { "amazon_order_id", "purchase_date", "sales_channel", "buyer_name", "buyer_email", "buyer_phone_number", "total_Number"};//定义Excel列项
byte[] filecontent = ExcelExportHelper.ExportExcel(Export, "", false, columns);
return File(filecontent,ExcelExportHelper.ExcelContentType,"text.xlsx");
}

类：

using OfficeOpenXml;
using OfficeOpenXml.Style;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Web;

namespace Order_Management.Library.Export
{
    public class ExcelExportHelper
    {
        public static string ExcelContentType
        {
            get
            {
                return "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            }
        }

        /// <summary>
        /// List转DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <returns></returns>
        public static DataTable ListToDataTable<T>(List<T> data)
        {
            PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
            DataTable dataTable = new DataTable();
            for (int i = 0; i < properties.Count; i++)
            {
                PropertyDescriptor property = properties[i];
                dataTable.Columns.Add(property.Name, Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType);
            }
            object[] values = new object[properties.Count];
            foreach (T item in data)
            {
                for (int i = 0; i < values.Length; i++)
                {
                    values[i] = properties[i].GetValue(item);
                }
                dataTable.Rows.Add(values);
            }
            return dataTable;
        }

        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <param name="dataTable">数据源</param>
        /// <param name="heading">工作簿Worksheet</param>
        /// <param name="showSrNo">是否显示行编号</param>
        /// <param name="columnsToTale">要导出的列</param>
        /// <returns></returns>
        public static byte[] ExportExcel(DataTable dataTable,string heading="",bool showSrNo=false,params string[] columnsToTale)
        {
            byte[] reslut = null;
            using (ExcelPackage package=new ExcelPackage())
            {
                ExcelWorksheet workSheet  = package.Workbook.Worksheets.Add(string.Format("{0}Data", heading));
                int startRowFrom = string.IsNullOrEmpty(heading) ? 1 : 3;
                if (showSrNo)
                {
                    DataColumn dataColumn = dataTable.Columns.Add("#", typeof(int));
                    dataColumn.SetOrdinal(0);
                    int index = 1;
                    foreach (DataRow item in dataTable.Rows)
                    {
                        item[0] = index;
                        index++;
                    }
                }
                workSheet.Cells["A" + startRowFrom].LoadFromDataTable(dataTable, true);
                int columnIndex = 1;
                foreach (DataColumn item in dataTable.Columns)
                {
                    ExcelRange columnCells = workSheet.Cells[workSheet.Dimension.Start.Row, columnIndex, workSheet.Dimension.End.Row, columnIndex];
                    int maxLength = columnCells.Max(cell => cell.Value == null ? 1 : cell.Value.ToString().Count());
                    if (maxLength<150)
                    {
                        workSheet.Column(columnIndex).AutoFit();
                    }
                    columnIndex++;
                }
                using (ExcelRange r=workSheet.Cells[startRowFrom,1,startRowFrom,dataTable.Columns.Count])
                {
                    r.Style.Font.Color.SetColor(System.Drawing.Color.White);
                    r.Style.Font.Bold = true;
                    r.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid;
                    r.Style.Fill.BackgroundColor.SetColor(System.Drawing.ColorTranslator.FromHtml("#1fb5ad"));
                }
                using (ExcelRange r=workSheet.Cells[startRowFrom+1,1,startRowFrom+dataTable.Rows.Count,dataTable.Columns.Count])
                {
                    r.Style.Border.Top.Style = ExcelBorderStyle.Thin;
                    r.Style.Border.Bottom.Style = ExcelBorderStyle.Thin;
                    r.Style.Border.Left.Style = ExcelBorderStyle.Thin;
                    r.Style.Border.Right.Style = ExcelBorderStyle.Thin;
                    r.Style.Border.Top.Color.SetColor(System.Drawing.Color.Black);
                    r.Style.Border.Bottom.Color.SetColor(System.Drawing.Color.Black);
                    r.Style.Border.Left.Color.SetColor(System.Drawing.Color.Black);
                    r.Style.Border.Right.Color.SetColor(System.Drawing.Color.Black);
                }
                for (int i = 0; i >= dataTable.Columns.Count - 1; i++)
                {
                    if (i == 0 && showSrNo)
                    {
                        continue;
                    }
                    if (!columnsToTale.Contains(dataTable.Columns[i].ColumnName))
                    {
                        workSheet.DeleteRow(i + 1);
                    }
                }
                if (!String.IsNullOrEmpty(heading))
                {
                    workSheet.Cells["A1"].Value = heading;
                    workSheet.Cells["A1"].Style.Font.Size = 20;
                    workSheet.InsertColumn(1, 1);
                    workSheet.InsertRow(1, 1);
                    workSheet.Column(1).Width = 5;
                }
                reslut = package.GetAsByteArray();
            }
            return reslut;
        }

        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="data"></param>
        /// <param name="heading"></param>
        /// <param name="isShowSlNo"></param>
        /// <param name="ColumnsToTake"></param>
        /// <returns></returns>
        public static byte[] ExportExcel<T>(List<T> data, string heading = "", bool isShowSlNo = false, params string[] ColumnsToTake)
        {
            return ExportExcel(ListToDataTable<T>(data), heading, isShowSlNo, ColumnsToTake);
        }
    }

效果图：

以上就是我的分享，欢迎各路大神一起探讨学习！