خروجی گرفتن از جداول بانک با فرمت xls برای اکسل

       Response.AddHeader("content-disposition", "attachment;filename=GridView-CV-Export.xls");

       Response.Charset = "UTF-8";

       Response.ContentType = "application/x-msdownload";
       Response.HeaderEncoding = System.Text.UTF8Encoding.UTF8;
       System.IO.StringWriter sw = new System.IO.StringWriter();

       HtmlTextWriter htw = new HtmlTextWriter(sw);

       GridViewexcel.RenderControl(htw);
       Response.Write("<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />");
       Response.Write(sw.ToString());

       Response.End();