Hi,
Given, say, this binding in XAML:

<TextBox Width="200" Text="{Binding Path=SelectedItem.Text, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"></TextBox>

where 'SelectedItem' may or may not have a 'Text' property.

It would be ideal to have some method of binding the 'IsEnabled' property so that the control was disabled if the binding fails but I can't think of a way of implementing this in a generic sort of way (I can't even find a way of detecting when the binding fails except by programatically monitoring the Trace - which is kludgy at best and certainly not something to use in production code)

Any suggestions?
Viv