private void cbo_loaitruyen_EditValueChanged(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(cbo_loaitruyen.Text))
{
return;
}
txt_matua.Text = ExecSQL.ExecProcedureSacalar("pro_taomatuatruyen", new { maloai = cbo_loaitruyen.EditValue.ToString() }).ToString();
}