Calling BindinExpression.UpdateSource() doesn't update bound property

[Scott]

I have a few RadNumericUpDown controls bound in TwoWay mode to properties. I have the following code that does get called when the KeyUp event occurs:

private void KeyUp(object sender, KeyEventArgs e)
{
    FrameworkElement fe = (FrameworkElement) sender;
    BindingExpression exp;
    if (fe is TextBox)
    {
        exp = fe.GetBindingExpression(TextBox.TextProperty);
    }
    else if (fe is RadNumericUpDown)
    {
        exp = fe.GetBindingExpression(RadRangeBase.ValueProperty);
    }
    else
    {
        throw new Exception("Invalid type");
    }

    exp.UpdateSource();
}

If I use this code on a TextBox the source is updated with the correct value but if I use a RadComboBox it does not update the source. What am I doing wrong?

What I'm trying to accomplish is to update all my bindings whenever a change is made to the RadNumericUpDown control without having to lose focus on the control. Pressing the up/down buttons in the control do update my bindings but typing numbers in the control do not until the contolr loses focus.

[Scott]

I figured it out. I just needed to change the UpdateValueEvent like so

UpDown1.UpdateValueEvent = UpdateValueEvent.PropertyChanged;

Thanks for listening to me ramble :-)

[sivakanth]

Hi Scott ,
              How to Update RadcomboBox value without losing Focus?
can u give me details..my mail id is [e-mail]