RadTreeListView inheritance.

[Anton]

I've tried to inherit class from RadTreeListView and add it on form via XAML and app shows nothing in debug.
How can I fix it quickly?
RadControls version = 2011.3.1220.40

public class TestTreeView : RadTreeListView
{
}

<controls:TestTreeView ItemsSource="{Binding Items}" />  -> empty screen
...
<t:RadTreeListView ItemsSource="{Binding Items}" />  -> fine

[Dimitrina]

Hello,

If you are setting the theme to your custom grid using StyleManager you have to set the DefaultStyleKey in the OnInitialized method. In general we are using composite key to set the theme to per control.
The snippet below demonstrates how to set any Telerik theme to a custom control named TestTreeView, which inherits RadTreeListView: 

public class TestTreeView:RadTreeListView
{
    static TestTreeView()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(MyCustomGrid), new FrameworkPropertyMetadata(typeof(MyCustomGrid)));
    }

    protected override void OnInitialized(EventArgs e)
    {
        base.OnInitialized(e);
        Theme theme = StyleManager.GetTheme(this);
        Type themeType = null;
        if (theme != null)
        {
            themeType = theme.GetType();
        }
        this.DefaultStyleKey = new ThemeResourceKey() { ElementType = typeof(RadTreeListView), ThemeType = themeType };
    }
}

You can also check this forum thread.

I hope this helps.


Regards,
Didie
Telerik