protected void ExportXLSBtn_Click(object sender, EventArgs e)
{
SponsorsReport p = GetReport();
string format = "xls";
string fileName = String.Format("Report.{0}", format);
MemoryStream ms = new MemoryStream();
p.ExportToXls(ms);
Response.Clear();
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition", String.Format("{0}; filename={1}", "attachment", fileName));
Response.BinaryWrite(ms.ToArray());
Response.Flush();
Response.Close();
//Response.Redirect("Reports/RT301.aspx");
}