asp.net导出excel

   Response.Clear();
   Response.Buffer= true;
   Response.Charset="GB2312";   
   Response.AppendHeader("Content-Disposition","attachment;filename=jtkc.xls");
   Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
   Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
   this.EnableViewState = false;   
   System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN",true);
   System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
   System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
   this.DataGrid1.RenderControl(oHtmlTextWriter);
   Response.Write(oStringWriter.ToString());
   Response.End();