Styling the RadTreeViewItem

The RadTreeViewItem can be styled by creating an appropriate Style and setting it to the Style property of the control or by creating an implicit style.

Targeting the RadTreeViewItem Element

In order to style all RadTreeViewItem elements in a RadTreeView, you should create a style targeting RadTreeViewItem.

Example 1: Creating an implicit style targeting RadTreeViewItem

<Grid> 
    <Grid.Resources> 
        <!-- If you are using the NoXaml binaries, you will have to base the style on the default one for the theme like so:  
        <Style TargetType="telerik:RadTreeViewItem" BasedOn="{StaticResource RadTreeViewItemStyle}">--> 
 
        <Style TargetType="telerik:RadTreeViewItem"> 
            <Setter Property="Foreground" Value="Red" /> 
        </Style> 
    </Grid.Resources> 
 
    <telerik:RadTreeView> 
        <telerik:RadTreeView.Items> 
            <telerik:RadTreeViewItem Header="Item 1"> 
                <telerik:RadTreeViewItem Header="Item 1.1" /> 
                <telerik:RadTreeViewItem Header="Item 1.2" /> 
            </telerik:RadTreeViewItem> 
            <telerik:RadTreeViewItem Header="Item 2" /> 
        </telerik:RadTreeView.Items> 
    </telerik:RadTreeView> 
</Grid> 

Figure 1: RadTreeViewItem with Red Foreground in the Fluent theme

You can also use the ItemContainerStyle and ItemContainerStyleSelector properties of the RadTreeView in order to style its items.