NumericUpDown Control - retaining Invalid Value

Hi All

I am on working on a UserControl inherited from NumericUpDown. The sole reason for writing such a control is because i wanted to display an error message (using ErrorProvider) when user enter a value beyond the limits.



// Reset errors
protected override void OnTextBoxTextChanged(object source, EventArgs e)
{
err.SetError(this, string.Empty);
base.OnTextBoxTextChanged (source, e);
}


// Control validation here
private void NUD_Validating(object sender, CancelEventArgs e)
{
err.SetError(this, string.Empty);
e.Cancel = !CheckValue();
}


This works fine in .Net 1.1. But when I migrated to .Net 4.0, this started to behave oddly. The error provider doesnt get displayed and value gets reset. I wonder why it is behaving differently in 1.1 and 4.0.

Can anyone please guide me ?

Thanks in Advance
Anu

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Anu Viswan : www.AnuViswan.blogspot.com