protected void BT_Export_CSV_Click(object sender, EventArgs e) { Media media = DataMapping.ExportDataGridToXLS(GridView1, "Statistiques.csv", Aspose.Cells.SaveFormat.CSV); string guid = Guid.NewGuid().ToString(); Session[guid] = media; Response.Redirect(Const.MEDIA_DOWNLOAD_URL + "?id=" + guid); }