private void SetControlStates()
{
if (identificationNumber != null)
{
edtQualifier.Enabled = rbUserId.Checked;
edtManufacturerName.Enabled = rbManufacturerId.Checked;
}
lblMfrName.RequiredField = rbManufacturerId.Checked;
lblQualifier.RequiredField = rbUserId.Checked;
lblMfrName.Invalidate();
lblQualifier.Invalidate();
requiredMfrNameValidator.IsEnabled = rbManufacturerId.Checked;
requiredQualifierValidator.IsEnabled = rbUserId.Checked;
Update();
}