Question

In Xaml page I reference my custom control this way:

<MyNamespace:CustControl x:Name="Cust1" />

Now I want change the property of this custom control in MouseLeftButtonDown event trigger:

private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {

    }

But when I try to write something like

CustControl.IsSelected = true;

An error says: An object reference is required ..

I think it’s all about “MyNamespace” namespace, but don’t know how to reference it.

Answer 1

You should be referencing Cust1, but sometimes Visual Studio does not immediately create a field member for the control. Try typing Cust1.IsSelected and even if Visual Studio doesn’t like it, try building to see if it succeeds.