CODEWITHSUNDEEP
wpf
RKM
RKM

Reputation: 3241

How to specify datacontext in WPF?

I have a class in the ViewModel folder called "MainViewModel", and I want my datacontext to be set to the class. I am doing it the following way, somehow it doesnt seem to work. Does anyone have some ideas? Thanks.

    xmlns:ViewModel="clr-namespace:***.***.ViewModel"
<MenuItem Header="always visible" DataContext="{Binding ViewModel:MainViewModel}"  IsCheckable="True" IsChecked="{Binding  MenuVisible}"  />

Many thanks.

Upvotes: 0

Views: 445

Answers (2)

Stephen Kiningham
Stephen Kiningham

Reputation: 504

As Tim has already noted, you are setting the class definition as your DataContext and not an instance. The example he gave sets the instance in XAML, which is perfectly accurate and gets the job done; however, in my experience you usually have the instance in your code-behind already. To set the DataContext, you would do something along the lines of:

myMenuItem.DataContext = myMainViewModelInstance;

Upvotes: 1

Tim Hoolihan
Tim Hoolihan

Reputation: 12396

You're setting the class as your datacontext, not an instance of the class. Declare an instance as in the example in this question and bind to it.

Upvotes: 0

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