Disabling Backspace Clear

[Andrew]

I'd like to disable the ability of the backspace key to clear my RadComboBox. I have tried doing the following:

public MyPage()
{
    InitializeComponent();

    this.myCombo.AddHandler(FrameworkElement.KeyDownEvent, new KeyEventHandler(myCombo_KeyDown), true);
}

protected void myCombo_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Back)
    {
        e.Handled = true;
    }
}

But this doesn't appear to work due to the fact that myCombo is cleared before my event handler ever fires, and e.Handled is already set to true. 

Is there any way I can disable the current backspace functionality?

Thanks.

[Ventzi]

Hi Andrew,

Unfortunately there is no way to handle the BackSpace key in Silverlight. The main reason is because you cannot handle the system key events in the TextBox which is a template child of the RadComboBox. 

In WPF you could handle the PreviewKeyDown event to prevent the backspace.

All the best,
Ventzi
the Telerik team

[Paul]

Hi,
    The limitation of not being able to disable the backspace key suck but understand why based on what you have said. Anyway a workaround for it is.

private void cboSite_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
{
    if (cboSite.SelectedItem == null) {
        if (e.RemovedItems.Count > 0) { cboSite.SelectedItem = e.RemovedItems[0]; }
    }
}

This stops the backspace key deleting the current selected item.

Thanks