Comments on: Using Behaviors to Allow the ViewModel to Manage View Lifetime in M-V-VM http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/ Thoughts on C#, WPF, .NET, and programming for Scientific Visualization Wed, 01 Feb 2012 16:38:09 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Scott Marlowe http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1674 Scott Marlowe Sun, 17 Apr 2011 17:09:52 +0000 http://reedcopsey.com/?p=59#comment-1674 Beautiful! I've been searching for a solution to this for a couple of hours now, trying different things, but your solution is what finally worked for me. Thanks. I adapted this for use in a WPF app, by the way, to handle closing a Window type. The only thing I had to change was your WindowClassBehavior class declaration: public class WindowCloseBehavior : Behavior Beautiful! I’ve been searching for a solution to this for a couple of hours now, trying different things, but your solution is what finally worked for me. Thanks.

I adapted this for use in a WPF app, by the way, to handle closing a Window type. The only thing I had to change was your WindowClassBehavior class declaration:

public class WindowCloseBehavior : Behavior

]]> By: Reed http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1668 Reed Mon, 21 Mar 2011 21:04:03 +0000 http://reedcopsey.com/?p=59#comment-1668 Unfortunately, I do not have one available at this time. A direct port would make little sense, as this is working against the Window class, which is unavailable in Silverlight. However, the concepts could be ported to other uses very easily. Unfortunately, I do not have one available at this time. A direct port would make little sense, as this is working against the Window class, which is unavailable in Silverlight. However, the concepts could be ported to other uses very easily.

]]> By: Hamza http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1663 Hamza Thu, 10 Mar 2011 06:33:51 +0000 http://reedcopsey.com/?p=59#comment-1663 Do you have a Silverlight 4 version of this behavior for MVVM? Do you have a Silverlight 4 version of this behavior for MVVM?

]]> By: Reed http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1129 Reed Thu, 22 Jul 2010 22:48:17 +0000 http://reedcopsey.com/?p=59#comment-1129 Dave, The behavior, as is, just provides a single point where you can prevent the Window from being closed. It does this by checking the CanExecute on the ICommand. One simple option: The command's CanExecute property, here, could prompt the user with a OK/Cancel button (and return false on Cancel). This would warn the user, and they'd have to hit "OK" to allow it to close without saving. Dave,

The behavior, as is, just provides a single point where you can prevent the Window from being closed. It does this by checking the CanExecute on the ICommand.

One simple option:

The command’s CanExecute property, here, could prompt the user with a OK/Cancel button (and return false on Cancel). This would warn the user, and they’d have to hit “OK” to allow it to close without saving.

]]> By: Dave http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1128 Dave Thu, 22 Jul 2010 20:14:40 +0000 http://reedcopsey.com/?p=59#comment-1128 How would you use this to warn a user they are going to lose their changes if they don't save? How would you use this to warn a user they are going to lose their changes if they don’t save?

]]> By: Attached Property port of my Window Close Behavior : Reed Copsey, Jr. http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1075 Attached Property port of my Window Close Behavior : Reed Copsey, Jr. Thu, 15 Apr 2010 21:12:49 +0000 http://reedcopsey.com/?p=59#comment-1075 [...] on The Code Project.  It is a port of the MVVM-friendly Blend Behavior I wrote about in a previous article to use Attached Properties instead of a Blend [...] [...] on The Code Project.  It is a port of the MVVM-friendly Blend Behavior I wrote about in a previous article to use Attached Properties instead of a Blend [...]

]]> By: Reed http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1064 Reed Tue, 13 Apr 2010 22:05:53 +0000 http://reedcopsey.com/?p=59#comment-1064 Tom, The MessageBox here was just to demonstrate that this worked, in concept. I completely agree that messaging should be abstracted. Personally, I use Dependency Injection and a message service, but messaging models work as well. Thanks for the feedback. -Reed Tom,

The MessageBox here was just to demonstrate that this worked, in concept. I completely agree that messaging should be abstracted. Personally, I use Dependency Injection and a message service, but messaging models work as well.

Thanks for the feedback.

-Reed

]]> By: Tom McKearney http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1060 Tom McKearney Tue, 13 Apr 2010 14:24:02 +0000 http://reedcopsey.com/?p=59#comment-1060 I would not put a MessageBox (UI code) inside a ViewModel. You need an abstraction for that part too, or you're violating the idea behind MVVM I would not put a MessageBox (UI code) inside a ViewModel. You need an abstraction for that part too, or you’re violating the idea behind MVVM

]]> By: Brent http://reedcopsey.com/2009/10/09/using-behaviors-to-allow-the-viewmodel-to-manage-view-lifetime-in-m-v-vm/#comment-1033 Brent Tue, 06 Apr 2010 02:18:54 +0000 http://reedcopsey.com/?p=59#comment-1033 Awesome! I've been searching for an elegant way to do this for some time. I really need to learn more about Behaviors. Thanks for sharing this! Awesome! I’ve been searching for an elegant way to do this for some time. I really need to learn more about Behaviors. Thanks for sharing this!

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