RadTreeView setting IsSelected and IsExpanded properties brake the view

[Svetoslav]

Hello, I am trying to bind the items of my RadTreeView to IsSelected and IsExpanded but when I use all my items are not visible in the tree.

I use it like this:

<telerik:RadTreeView.ItemContainerStyle >
         <Style TargetType="telerik:RadTreeViewItem">
             <Setter Property="IsSelected" Value="{Binding IsSelected}" />
             <Setter Property="IsExpanded" Value="{Binding IsExpanded}" />
         </Style>

I tried to add to the style BasedOn="{StaticResource RadTreeViewItemStyle}" but I received warning that the style cannot be resolved, how can I use it?

[Svetoslav]

I found workaround for me after posting this.

[Svetoslav]

In fact it works when use the style like this:

<Style x:Key="selectTreeDialogStyle" TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">
    <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
    <Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
</Style>

 

But I still get error in the designer "
"The resource "RadTreeViewItemStyle" could not be resolved."

I have imported these:

 

[Martin Ivanov]

Hello Svetoslav,

The BasedOn property points to a base style. In your case, this is the RadTreeViewItemStyle which you can get only if you use the NoXaml version of the Telerik dlls. Otherwise, you don't need to set BasedOn. I could recommend you to check the following articles and see if they help for resolving the issue:

• Xaml vs. NoXaml article
• Resolving Design Time Errors article

Regards,
Martin Ivanov
Progress Telerik

[Svetoslav]

Thanks for the articles.