protected void btnDownloadPdfExamQuestion_Click(object sender, EventArgs e) { if (ddlDate.SelectedIndex > 0 && ddlSans.SelectedIndex > 0 && ddlDid.SelectedIndex > 0) { var dt = EBusiness.GetAllDidsToTransferToLms(null, ddlDate.SelectedValue, ddlSans.SelectedValue, ddlDid.SelectedValue); if (dt != null && dt.Rows.Count > 0) { DownloadGeneratedPdf(dt.Rows[0]); } } }