Click here to Skip to main content
15,355,296 members
Articles / Desktop Programming / WPF
Alternative
Tip/Trick
Posted 22 Nov 2010

Tagged as

Stats

8.2K views
1 bookmarked

How to hook up a ViewModel to a window using an attached property

Rate me:
Please Sign up or sign in to vote.
0.00/5 (No votes)
22 Nov 2010CPOL
I also have implemented a MarkupExtension to set the DataContext, which looks like this:[MarkupExtensionReturnType(typeof(ApplicationControllerBase))]public class ApplicationDataContext : MarkupExtension{ private Type dataContextType; public ApplicationDataContext(Type...
I also have implemented a MarkupExtension to set the DataContext, which looks like this:

[MarkupExtensionReturnType(typeof(ApplicationControllerBase))]
public class ApplicationDataContext : MarkupExtension
{
	private Type dataContextType;
	public ApplicationDataContext(Type dataContextType)
	{
		this.dataContextType = dataContextType;
	}

	public ApplicationDataContext()
		: this(null)
	{
	}

	public override object ProvideValue(IServiceProvider serviceProvider)
	{
		return ApplicationControllerBase.GetController(dataContextType);
	}
}


The usage of this is quite simply;
<Grid DataContext="{vm:ApplicationDataContext app:...}">
...
</Grid>


If you set the DataContext on an an element inside <window> rather than directly on Window, you will get your ViewModel object instanciated design-time.

When doing this, you should avoid service or database calls, as they will likely throw configurationexceptions.
You can detect the designer i code using this statement:

if(DesignerProperties.GetIsInDesignMode(new System.Windows.DependencyObject())
{
  ...
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Morten Nilsen
Norway Norway
No Biography provided

Comments and Discussions

 
Generalwww clothing2shoes com Abercrombie & Fitch Coogi Fashion ... Pin
bagsshoes2822-Nov-10 23:23
Memberbagsshoes2822-Nov-10 23:23 
www clothing2shoes com Abercrombie & Fitch Coogi Fashion designer Air Jordan Retro shoes MBT shoes series North Face Fashion
GeneralVery Nice Article Pin
Sohan Singh Chauhan22-Nov-10 19:29
MemberSohan Singh Chauhan22-Nov-10 19:29 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.