WPF Commanding - Doing additional UI Work

richardb posted on Thursday, September 10, 2009

Hi,

Doing a WPF UI on top of CSLA 3.8.  Good fun and excellent stuff.

Have a 2 questions that are probably more WPF related but is around the commanding options.

As per the ProjectTracker sample, I have my Save and Cancel buttons hooked directly to my business object.  When I click the Save button the object saves itself.  Great!  But, I want the save button to close the form also.  Ultimately I'm looking for an OK, Apply and Canel series of buttons.

1.  Can I do this through xaml or do I need to discard the commanding and do it all in code-behind?

2. Also, as I modify a field it is only when I tab off the control that the binding fires and the business object updates the buttons.  Is there some trick to firing this as a character is changed, added or removed?

Thanks,
Richard.

RockfordLhotka replied on Thursday, September 10, 2009

You can use commanding, and implement the command handler in code-behind.

Or you can not use commanding, and handle the Click event in code-behind.

Either way, the easy solutions result in code-behind.

If you want to avoid the code-behind, you'll probably want to look at the MVVM pattern.

In CSLA .NET 3.8 I'm working to better support various MVVM approaches - but so far I've been doing all my work in Silverlight, so none of the new features exist for WPF yet.