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//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();标签：
原文地址：http://www.cnblogs.com/armyfai/p/4782999.html
