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TreeView

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5 Answers, 1 is accepted

answered on 27 Jan 2011, 12:27 PM

It happens random and not very often. There are no chnages to tree style. Not really sure what other useful information I can tell you ... Please find the code below:

<localcontrols:RadTreeViewExtended IsLineEnabled="True" IsEditable="False"

x:Name="TreeListView" ItemTemplate="{StaticResource test}"

Background="Transparent"

ScrollViewer.HorizontalScrollBarVisibility="Auto"

ScrollViewer.VerticalScrollBarVisibility="Auto"

IsExpandOnSingleClickEnabled="False"

IsExpandOnDblClickEnabled="True"

SelectionChanged="TreeListView_SelectionChanged"

Expanded="TreeListView_Expanded"

IsLoadOnDemandEnabled="True"

SelectionMode="Single"

LoadOnDemand="TreeListView_LoadOnDemand"

VerticalAlignment="Stretch">

<telerik:RadContextMenu.ContextMenu>

<telerik:RadContextMenu

x:Name="TreeContextMenu"

Opened="TreeContextMenu_Opened"

ItemClick="TreeContextMenu_ItemClick">

<telerik:RadContextMenu.Items>

</telerik:RadContextMenu.Items>

</telerik:RadContextMenu>

</telerik:RadContextMenu.ContextMenu>

</localcontrols:RadTreeViewExtended>

<telerik:ContainerBindingCollection x:Name="BindingsCollection">

<telerik:ContainerBinding PropertyName="IsExpanded" Binding="{Binding IsExpanded, Mode=TwoWay}"/>

<telerik:ContainerBinding PropertyName="IsSelected" Binding="{Binding IsSelected, Mode=TwoWay}"/>

</telerik:ContainerBindingCollection>

<telerik:HierarchicalDataTemplate x:Key="test" ItemsSource="{Binding Children}"

telerik:ContainerBinding.ContainerBindings="{StaticResource BindingsCollection}">

<TextBlock Text="{Binding DisplayName}"/>

</telerik:HierarchicalDataTemplate>

public class RadTreeViewExtended: RadTreeView

{

protected override DependencyObject GetContainerForItemOverride()

{

RadTreeViewItemExtended tvi = new RadTreeViewItemExtended();

Binding isLoadOnDemandEnabledBinding = new Binding("HasChildren");

isLoadOnDemandEnabledBinding.Mode = BindingMode.TwoWay;

tvi.SetBinding(RadTreeViewItemExtended.IsLoadOnDemandEnabledProperty, isLoadOnDemandEnabledBinding);

return tvi;

}