Web C# 导出Excel 方法总结

 1 //Excel文件名称
 2     string ExcelName = System.DateTime.Now.ToString("yyMMdd") + "退款结算单.xlsx";
 3 
 4     /// <summary>
 5     /// 批量退款
 6     /// </summary>
 7     /// <param name="sender"></param>
 8     /// <param name="e"></param>
 9     protected void Button1_Click(object sender, EventArgs e)
10     {
11         DataSet ds = new DataSet();
12 
13         DataTable dt1 = new DataTable();
14         dt1.Columns.Add("批次号");
15         dt1.Columns.Add("总金额(元)");
16         dt1.Columns.Add("总笔数");
17 
18         DataRow row1 = dt1.NewRow();
19 
20         row1 = dt1.NewRow();
21         row1["批次号"] = "20150425001";
22         row1["总金额(元)"] = "0.03";
23         row1["总笔数"] = "1";
24         dt1.Rows.Add(row1);
25 
26         ds.Tables.Add(dt1);
27 
28         DataTable dt2 = new DataTable();
29         dt2.Columns.Add("商户订单号");
30         dt2.Columns.Add("支付宝交易号");
31         dt2.Columns.Add("退款金额");
32         dt2.Columns.Add("退款备注");
33 
34         DataRow row2 = dt2.NewRow();
35 
36         row2 = dt2.NewRow();
37         row2["商户订单号"] = "D150418092109-40";
38         row2["支付宝交易号"] = "2015041800001000770049196543";
39         row2["退款金额"] = "0.02";
40         row2["退款备注"] = "导入excel测试";
41         dt2.Rows.Add(row2);
42 
43         ds.Tables.Add(dt2);
44 
45 
46         doExport(ds, Server.MapPath(ExcelName));
47     }

 1  private Microsoft.Office.Interop.Excel.Application _Excel = null;
 2 
 3     /// <summary>
 4     /// 将 DataSet 数据写入 _Excel
 5     /// </summary>
 6     /// <param name="ds"></param>
 7     /// <param name="strExcelFileName"></param>
 8     private void doExport(DataSet ds, string strExcelFileName)
 9     {
10         int rowIndex = 1;//当前行数
11         int colIndex = 0;//当前列数
12 
13 
14         _Excel = new Microsoft.Office.Interop.Excel.Application();
15         _Excel.Application.Workbooks.Add(true);
16 
17 
18         for (int i = 0; i < ds.Tables.Count; i++)
19         {
20             DataTable table = ds.Tables[i];
21             colIndex = 0;//列初始化
22             // 列标题
23             foreach (DataColumn col in table.Columns)
24             {
25                 colIndex++;
26                 _Excel.Cells[rowIndex, colIndex] = col.ColumnName;
27             }
28 
29             // 内容
30             foreach (DataRow row in table.Rows)
31             {
32                 rowIndex++;
33                 colIndex = 0;
34                 foreach (DataColumn col in table.Columns)
35                 {
36                     colIndex++;
37                     _Excel.Cells[rowIndex, colIndex] = "‘" + row[col.ColumnName].ToString();
38                 }
39             }
40 
41             rowIndex++;//行+1 防止table又多个情况
42         }
43 
44         _Excel.Visible = false;
45         // 保存文件
46         SaveToDisk(strExcelFileName);
47 
48         _Excel.Quit();
49         _Excel = null;
50     }

 1   /// <summary>
 2     /// 导出方法
 3     /// </summary>
 4     /// <param name="path">路径</param>
 5     private void SaveToDisk(string path)
 6     {
 7         if (!string.IsNullOrEmpty(path))
 8         {
 9             System.IO.FileInfo info = new FileInfo(path);
10             if (!info.Exists)
11             {
12                 _Excel.ActiveWorkbook.SaveCopyAs(path);
13 
14                 /*
15                 微软为Response对象提供了一个新的方法TransmitFile来解决使用Response.BinaryWrite
16                 下载超过400mb的文件时导致Aspnet_wp.exe进程回收而无法成功下载的问题。
17                 代码如下：
18                */
19                 Response.ContentType = "text/xml";
20                 Response.AddHeader("Content-Disposition", "attachment;filename=" + ExcelName);
21                 string filename = Server.MapPath(ExcelName);
22                 Response.TransmitFile(filename);
23             }
24             else
25             {
26                 info.Delete();
27                 _Excel.DisplayAlerts = false;
28                 _Excel.AlertBeforeOverwriting = false;
29                 _Excel.ActiveWorkbook.SaveCopyAs(path);
30             }
31         }
32     }