ASP.NET用DataSet导出到Excel的方法

/读取临时文件 

   GYYW.DA.Common.Base_SqlDataBase daBZDM = new GYYW.DA.Common.Base_SqlDataBase(); 

   DataSet dsBZDM = daBZDM.GetDataSetBySql("select QCDM,MC,GG from WG_BZDM where QCDM like '02%'"); 
   //同时将虚拟目录下的Data作为临时文件目录。 

   string urlPath = HttpContext.Current.Request.ApplicationPath + "/Data/"; 

   string physicPath = HttpContext.Current.Server.MapPath(urlPath); 

   //string fileName = Guid.NewGuid() + ".Xls"; 

   string fileName ="DownLoad.Xls"; 

   string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + physicPath + fileName +";Extended Properties=Excel 8.0;"; 
 

   OleDbConnection objConn = new OleDbConnection(connString); 

   OleDbCommand objCmd = new OleDbCommand(); 

   objCmd.Connection = objConn; 

   objCmd.Connection.Open(); 
   

   //建立表结构 

   objCmd.CommandText = @"CREATE TABLE Sheet1(器材代码 varchar,名称 varchar, 规格 varchar)"; 

   objCmd.ExecuteNonQuery(); 

   //建立插入动作的Command 
  

   objCmd.CommandText = "INSERT INTO Sheet1(器材代码, 名称,规格) VALUES (@QCDM, @MC, @GG)";   

   objCmd.Parameters.Clear(); 

   
   objCmd.Parameters.Add(new OleDbParameter("@QCDM", OleDbType.VarChar)); 

   objCmd.Parameters.Add(new OleDbParameter("@MC", OleDbType.VarChar)); 

   objCmd.Parameters.Add(new OleDbParameter("@GG",OleDbType.VarChar)); 
    

   //遍历DataSet将数据插入新建的Excel文件中 

   foreach (DataRow row in dsBZDM.Tables[0].Rows) 

   {   

    for (int i=0; i<objCmd.Parameters.Count; i++) 

    { 

     objCmd.Parameters[i].Value = row[i]; 

    } 

    objCmd.ExecuteNonQuery(); 

   } 

   objCmd.Connection.Close(); 

   
   //提供下载 

   //清除临时文件 

   HttpResponse response = HttpContext.Current.Response; 

   response.Clear(); 

   //为输出作准备 

   response.WriteFile(urlPath + fileName); 

   string httpHeader="attachment;filename=KCMX.Xls"; 

   response.AppendHeader("Content-Disposition", httpHeader); 

   response.Flush(); 

   //输出完毕后清除临时文件 

   string strSaveDir = "../Data/"; 

   string strFile = Server.MapPath(strSaveDir + fileName).ToString(); 

   //string sss = urlPath + fileName; 

   System.IO.File.Delete(strFile);//删除临时文件 

   response.End();