private void cbxSubject_SelectedValueChanged(object sender, EventArgs e)
{
if (check)
{
try {
txtSubjectCode.Text = cbxSubject.SelectedValue.ToString();
if (txtSubjectCode.Text.Equals("-1"))
{
loadData();
}
else
{
dataTeacherSubject.DataSource = tdb.selectTeachSubjectBySubjectCode_Dat(txtSubjectCode.Text);
}
}
catch (Exception ex) {
MessageBox.Show(ex.Message);
}
}
}
