Virtaulising Wrap Panel Notworking in TreeViewItemContainer Style
some code snippet is here...
<ItemsPanelTemplate x:Key="ItemsPanelTemplateRadTreeViewItem">
<telerik:RadWrapPanel ItemWidth="150"/>
</ItemsPanelTemplate>
<Style x:Key="itemStyle" TargetType="telerik:RadTreeViewItem">
<Setter Property="IsExpanded" Value="True" />
<Setter Property="ItemsPanel" Value="{StaticResource ItemsPanelTemplateRadTreeViewItem}" />
</Style>
<telerik:RadTreeView IsExpandOnSingleClickEnabled="True" SelectionMode="Multiple" IsTriStateMode="True" ItemsOptionListType="CheckList" VerticalAlignment="Top" VerticalContentAlignment="Top" IsExpandOnDblClickEnabled="True" IsOptionElementsEnabled="True" ItemContainerStyle="{StaticResource itemStyle}" />
some code snippet is here...
<ItemsPanelTemplate x:Key="ItemsPanelTemplateRadTreeViewItem">
<telerik:RadWrapPanel ItemWidth="150"/>
</ItemsPanelTemplate>
<Style x:Key="itemStyle" TargetType="telerik:RadTreeViewItem">
<Setter Property="IsExpanded" Value="True" />
<Setter Property="ItemsPanel" Value="{StaticResource ItemsPanelTemplateRadTreeViewItem}" />
</Style>
<telerik:RadTreeView IsExpandOnSingleClickEnabled="True" SelectionMode="Multiple" IsTriStateMode="True" ItemsOptionListType="CheckList" VerticalAlignment="Top" VerticalContentAlignment="Top" IsExpandOnDblClickEnabled="True" IsOptionElementsEnabled="True" ItemContainerStyle="{StaticResource itemStyle}" />