Question

I am building a WPF application using MVVM Light and having problems tying up my Views to my View Model. I have a view model in which I am passing in an Interface of IDataContext, which is basically passing in a datacontext.Then I have an View which I have inserted the following statement on top

DataContext="{Binding MyViewModel, Source={StaticResource Locator}}"

In my ViewModelLocator I have added the following lines :

IoC.Register<IDataContext, MyDataContext>();

and

IoC.Register<MyViewModel>();

And after putting a break point in the constructor of the ‘MyViewModel’, the breakpoint gets hit. Is there something I am missing, please help???

Answer 1

Did you define a public getter for your viewModel in ViewModelLocator class as shown below?

    public MyViewModel MainViewModel
    {
        get
        {
            return SimpleIoc.Default.GetInstance<MyViewModel>();
        }
    }

and then use the “MainViewModel” in the view binding as shown below

DataContext="{Binding MainViewModel, Source={StaticResource Locator}}"

What kind of behavior you see? Empty view window with no datacontext set? OR exception when displaying your view?