Asp. NET export to Excel with a dataset

//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();

Asp. NET export to Excel with a dataset