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 = ; 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 = ; 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) ?  : ;
                 if (showSrNo)
                 {
                     DataColumn dataColumn = dataTable.Columns.Add("#", typeof(int));
                     dataColumn.SetOrdinal();
                     int index = ;
                     foreach (DataRow item in dataTable.Rows)
                     {
                         item[] = index;
                         index++;
                     }
                 }
                 workSheet.Cells["A" + startRowFrom].LoadFromDataTable(dataTable, true);
                 int columnIndex = ;
                 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 ?  : cell.Value.ToString().Count());
                     if (maxLength<)
                     {
                         workSheet.Column(columnIndex).AutoFit();
                     }
                     columnIndex++;
                 }
                 using (ExcelRange r=workSheet.Cells[startRowFrom,,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+,,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 = ; i >= dataTable.Columns.Count - ; i++)
                 {
                     if (i ==  && showSrNo)
                     {
                         continue;
                     }
                     if (!columnsToTale.Contains(dataTable.Columns[i].ColumnName))
                     {
                         workSheet.DeleteRow(i + );
                     }
                 }
                 if (!String.IsNullOrEmpty(heading))
                 {
                     workSheet.Cells["A1"].Value = heading;
                     workSheet.Cells["A1"].Style.Font.Size = ;
                     workSheet.InsertColumn(, );
                     workSheet.InsertRow(, );
                     workSheet.Column().Width = ;
                 }
                 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！