Channel 9 Forums - Tech Off - How does this work? http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 Forums - Tech Off - How does this work? http://channel9.msdn.com/Forums Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Forums en Sun, 19 May 2013 20:31:10 GMT Sun, 19 May 2013 20:31:10 GMT Rev9 3 -3 -1 Tech Off - How does this work? So I'm watching the video at http://channel9.msdn.com/Events/MIX/MIX10/EX14.  During the demo at 33 minutes in, something magical happens, and the system knows to disable the command button.  Can anyone explain how it knows?  I can't use this stuff if I can't figure out how it works. Sad

]]> http://channel9.msdn.com/Forums/TechOff/How-does-this-work/f862219ee2424550b263a0bd013f8b07#f862219ee2424550b263a0bd013f8b07 Thu, 30 Aug 2012 19:23:25 GMT http://channel9.msdn.com/Forums/TechOff/How-does-this-work/f862219ee2424550b263a0bd013f8b07#f862219ee2424550b263a0bd013f8b07 Walter R. 3 http://channel9.msdn.com/Niners/MasterRanger/Discussions/RSS Tech Off - How does this work? @MasterRanger: It's the WPF Command framework. ICommand.CanExecute. Details beyond that? I'd imagine there's an event raised to any listeners (which would be anything bound to the command instance). The beauty of a framework is that I don't need to know how it works, just how to use it. Smiley

From some quick searching, it seems that the CommandManager class is involved.

]]> http://channel9.msdn.com/Forums/TechOff/How-does-this-work/bd608cf6fe2d4288bea8a0bd014d9ba1#bd608cf6fe2d4288bea8a0bd014d9ba1 Thu, 30 Aug 2012 20:14:37 GMT http://channel9.msdn.com/Forums/TechOff/How-does-this-work/bd608cf6fe2d4288bea8a0bd014d9ba1#bd608cf6fe2d4288bea8a0bd014d9ba1 Scott 3 http://channel9.msdn.com/Niners/spivonious/Discussions/RSS Tech Off - How does this work? @MasterRanger: Yea.  The whole CanExecute thing.  Take a look at this video.

http://www.lab49.com/wp-content/uploads/2011/12/Jason_Dolinger_MVVM.wmv

It helped me understand, hopefully it will help you.

Reference: Here is the page where the link to Jason's wmv lives.  http://blog.lab49.com/archives/2650

 

]]> http://channel9.msdn.com/Forums/TechOff/How-does-this-work/924ee043a0b34a71b3bda0be00dbba0b#924ee043a0b34a71b3bda0be00dbba0b Fri, 31 Aug 2012 13:20:00 GMT http://channel9.msdn.com/Forums/TechOff/How-does-this-work/924ee043a0b34a71b3bda0be00dbba0b#924ee043a0b34a71b3bda0be00dbba0b Dave Williamson 3 http://channel9.msdn.com/Niners/davewill/Discussions/RSS