FileInfo file = new FileInfo("C:\\Inetpub\\wwwroot\\webreportengine\\" + ID + ".xls");
            Response.Clear();
            Response.BufferOutput = true;
            string encodedname = System.Web.HttpUtility.UrlEncode(WON);
            Response.AddHeader("Content-Disposition", "attachment; filename=" + WON + ".xls");
            Response.AddHeader("Content-Length", file.Length.ToString());
            Response.AddHeader("Content-Type", "windows-1251");
            Response.ContentType = "application/octet-stream";
            Response.TransmitFile(file.Name);
            Response.Flush();