//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();