Unknown Recipes

Sometime we need to know when an attached property change its value for a specific FrameworkElement. For example consider the following:

It is really very simple, all that we need is the FrameworkElement and the DependencyProperty that we need refresh. I did some extensions method to update the target or the source of the binding:

Some time ago I wrote a post about this subject, but that post only apply to Visual Studio 2005. The targets used in that post where changed. Basically this post is an update to Visual Studio 2008 SP1. Note that this post does not apply to Visual Studio 2008 without SP1, there were some changes between the two versions of the used target.

By default all the TextBox’s (an other controls) in WPF have a default ContextMenu that allows copy, paste and cut. You can disable this menu by setting this property as “{x:Null}”, but the keys associated with the menu options still work. In order to disable this commands we can use the DataObject class, which have handlers to attach any DepencencyObject in case on Copy or Paste:

WPF provides validation infrastructure for binding scenarios through IDataErrorInfo interface. Basically you have to implement the Item[columnName] property putting the validation logic for each property in your Model (or ModelView) requiring validation. From XAML you need to set ValidatesOnDataErrors to true and decide when you want the binding invoke the validation logic (through UpdateSourceTrigger).

Finally MOQ 3.1 was released, it includes a lot of fixes of the previous version (3.0). You can get the binaries here.

There are times when you need get and set property values and you do not know the type of the properties. One option is use reflection through GetValue and SetValue from PropertyInfo class, but this wears to poor performance in our code.

Finally the new version of Moq is released, check the new improvements and fixes here.