load on demand on tree list view

[Syed Hussain]

I was using the radtreeview with quite a lot of nodes and found that performance was slow. I read telerik documentation and it said I can use treelistview as an alternative to treeview. Now when I try to implement loadondemand on this treelist view, during the isexpand property even though the children are added to collection the grid is not refreshed. Since this collection is stored as static variable, when I close the form and open it it displays the parent and children. My isexpanded is implemented in viewmodel where it hits the db and gets the collection. Is there something I am missing in order to implement loadondemand or is this feature not available. I am using WPF Q2 SP1 controls
<
  

<Window.Resources> 

 

 

 

 

 

<Style x:Key="TreeListViewStyle" TargetType="{x:Type telerik2:TreeListViewRow }">  

 

 

 

<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" /> 

 

 

 

 

 

</Style>

 

 

 

 

 

 

 

</Window.Resources>

 

 

 

 

 

 

 

 

<telerik:RadTreeListView x:Name="rdTreeList" AutoGenerateColumns="False"

 

 

 

Width="Auto" RowStyle="{StaticResource TreeListViewStyle}"

 

 

 

ItemsSource="{Binding UnitValueObjectList,Mode=TwoWay}"

 

 

 

>

 

 

 

 

 

 

 

<telerik:RadTreeListView.ChildTableDefinitions>

 

 

 

 

 

 

 

<telerik:TreeListViewTableDefinition ItemsSource="{Binding Path=ChildNodes,Mode=TwoWay}" >

 

 

 

 

 

 

 

</telerik:TreeListViewTableDefinition>

 

 

 

 

 

 

 

<telerik:TreeListViewTableDefinition ItemsSource="{Binding Path=ChildNodes,Mode=TwoWay}"/>

 

 

 

 

 

 

 

<telerik:TreeListViewTableDefinition ItemsSource="{Binding Path=ChildNodes,Mode=TwoWay}"/>

 

 

 

 

 

 

 

</telerik:RadTreeListView.ChildTableDefinitions>

 

 

 

 

 

 

 

<telerik:RadTreeListView.Columns>

 

 

 

 

 

 

 

<telerik:GridViewDataColumn DataMemberBinding="{Binding Name,Mode=TwoWay}" Header="Name" />

 

 

 

 

 

 

 

</telerik:RadTreeListView.Columns>

 

 

 

 

 

 

 

</telerik:RadTreeListView>

 

 

>

 

 

 

[Yavor Georgiev]

Hello Syed Hussain,

 Please check the answer to the private support ticket you opened.

Kind regards,
Yavor Georgiev
the Telerik team

[Ivano]

Hi

I need the load on demand feature too. Any solution?

Sincerely.
Ivano

[Vlad]

Hello,

 Please check the local copy of this demo for more info. Here is also the Silverlight version.

Best wishes,
Vlad
the Telerik team