private void txtID_KeyDown(object sender, KeyEventArgs e)
{
TextEdit textEdit = (TextEdit)sender;
if (e.KeyCode == Keys.Return | e.KeyCode == Keys.Tab)
{
DIC_POSITION dICPOSITION = new DIC_POSITION();
if (this.m_Status == Actions.Add)
{
if (dICPOSITION.Exist(textEdit.Text))
{
this.Err.SetError(textEdit, "Mã đã tồn tại.");
textEdit.Focus();
}
}
}
}
