Asp.net获取服务器指定文件夹目录文件并提供下载的方法

      //临时数据表
      DataTabledt=newDataTable();
      dt.Columns.Add("FileName");
      
      foreach(FileInfofileInfoinfiles)
      {
   DataRowdr=dt.NewRow();
   dr["FileName"]=fileInfo.Name;
   dt.Rows.Add(dr);

      }
      Repeater1.DataSource=dt;
      Repeater1.DataBind();
}

if(e.CommandName=="down")
{
   try
   {
    stringDownloadFileName="~/uploads/"+e.CommandArgument.ToString();//文件路径
    stringfilepath=Server.MapPath(DownloadFileName);
    stringfilename=Path.GetFileName(filepath);
    FileInfofile=newFileInfo(filepath);
    Response.Clear();
    Response.ContentType="application/octet-stream";
    Response.AddHeader("Content-Disposition","attachment;filename="+HttpUtility.UrlEncode(filename,System.Text.Encoding.UTF8));
    Response.AddHeader("Content-length",file.Length.ToString());
    Response.Flush();
    Response.WriteFile(filepath);
   }
   catch
   {
 Response.Write("<script>alert("没有找到下载的源文件")</script>");
   }
}