Bug: Crash when setting IsVirtualization in a style setter

[hwsoderlund]

The following xaml crashes with the message "The property 'IsVirtualizing' was not found in type 'Telerik.Windows.Controls.RadTreeView'. [Line: 15 Position: 30]"

If I comment out the style setter and put IsVirtualizing="True" directly on the treeview it works fine.

I am using the latest internal build (RadControls_for_Silverlight_5_2012_3_1112_DEV_hotfix).

<UserControl x:Class="TelerikTestProject01.MainPage_TreeView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
             mc:Ignorable="d"
             d:DesignHeight="300"
             d:DesignWidth="400">

    <UserControl.Resources>

        <Style x:Key="RadTreeViewStyle"
               TargetType="telerik:RadTreeView">
            <Setter Property="IsVirtualizing"
                    Value="True"></Setter>
        </Style>

    </UserControl.Resources>

    <Grid x:Name="LayoutRoot">

        <telerik:RadTreeView x:Name="RadTreeView1"
                          Style="{StaticResource RadTreeViewStyle}"></telerik:RadTreeView>

    </Grid>
</UserControl>

[Pavel R. Pavlov]

Hi Henrik,

You can only set a DependencyProperty using a Style.Setter. However, in the implementation of the RadTreeView, the IsVirtualizing property is defined as a simple boolean object which internally sets the TreeViewPanel.IsVirtualizing DependencyProperty. This is why if you need to control the virtualizaiton  feature through a style, you need to set the  of the TreeViewPanel.IsVirtualizing property as shown in the following snippet:

Grid x:Name="LayoutRoot">
    <Grid.Resources>
        <Style x:Key="RadTreeViewStyle" TargetType="telerik:RadTreeView">
            <Setter Property="telerik:TreeViewPanel.IsVirtualizing" Value="True"/>
        </Style>
    </Grid.Resources>
    <telerik:RadTreeView x:Name="RadTreeView1" Style="{StaticResource RadTreeViewStyle}" />
</Grid>

Let me know if you have any other questions.

Regards,
Pavel R. Pavlov
the Telerik team