protected void drpUserStatus_SelectedIndexChanged(object sender, EventArgs e) { setSignature(); DataTable dt = business.GetSignInfByUserAndCartable(drpUser.SelectedValue, Convert.ToInt32(drpUserStatus.SelectedItem.Value)); if (dt.Rows.Count > 0) { txtFromDate.Text = dt.Rows[0]["fromDate"].ToString(); txtToDate.Text = dt.Rows[0]["toDate"].ToString(); } else { txtFromDate.Text = ""; txtToDate.Text = ""; } }