I have a data collection of type ObservableCollection (say instance as myClassTypes). After some user operation, this myClassTypes populated with values in ViewModel. In view, there is a TextBox wh...

So I have a control like this simplified version: <local:ImageMapField x:Class="ImageApp.WPF.Controls.ImageMapContentField" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" x...

In WPF there are 3 ways to do validation: Validation Rules IDataErrorInfo INotifyDataErrorInfo Is it possible to use a combination of these at the same time? For my needs, I would like to valid...

I'm using the INotifyDataError interface for async validation in WPF. I have a property <TextBox Grid.Column="5" Text="{Binding XXX.Name, ValidatesOnNotifyDataErrors=True}"/> On my view ...

I realized that appears this interface in .NET Framework 4.5 I was looking first for about how to implemented in Silverlight (I can imagine that it's implemented in the same way), but I can'...

This is a wierd one and at this point I am thinking that it may have something to do with my machines configuration. Basically I have created a pretty standard implementation of INotifyDataErrorIn...