Question

I am trying to manually rebind the data to a ContentControl.

<UserControl.Resources>
    <local:MyModel x:Key="myModel" />
    <DataTemplate DataType="{x:Type local:MyModel}">            
        <StackPanel>
            <TextBlock Text="{Binding Path=Property1}"></TextBlock>
        </StackPanel>
    </DataTemplate>
</UserControl.Resources>
<Grid>
<ContentControl Content="{Binding Source={StaticResource myModel}}" Name="myView">
</ContentControl>
</Grid>

And in the code behind

MyModel myModel = this.FindResource("myModel") as MyModel ;
myModel.Property1 = "Test";
var bindingExpression = myView.GetBindingExpression(ContentControl.ContentProperty);
bindingExpression.UpdateTarget();

But it doesn’t seem to work, what am I missing?

Answer 1

If Property1 doesn’t raise a change event when it changes, the TextBox doesn’t know that the data has changed and to update.

Make your MyModel class implement INotifyPropertyChanged, and raise the PropertyChanged event when Property1 changes, and it will work.

Also, you don’t need to explicitly tell WPF that ContentControl.Content has changed because it hasn’t. It still points to the same MyModel object.