Question

Let’s say that I have a global variable defined in App.xaml.cs as follows:

public static MyClass GlobalInstance = new MyClass() 

And then in MainPage.xaml I would like to bind to a property of this class like follows:

<TextBlock Text="{Binding App.GlobalInstance.Property1}" VerticalAlignment="Top" Height="31" HorizontalAlignment="Left" Width="80"> 

Is there something I am missing here? For some reason it does not appear to be properly bound.

Any advice here would be greatly appreciated.

Thanks!

Answer 1

You need to assign your App to DataContext of the page

First way is do this in page constructor:

 public MainPage()
 {
     InitializeComponent();

     DataContext = App.Current;
 }

And your binding will be

 {Binding GlobalInstance.Property1}

The second way is to make a reference to App class in page resources

Also, edit your field implementation to something like this:

 public static MyClass GlobalInstance {get; private set; }

 ...
 GlobalInstance = new MyClass();