ContextMenu with RadTreeListView - GetClickedElement problem

[Dario]

Hi guys,

I have this XAML

<telerik:RadTreeListView AutoGenerateColumns="False" ItemsSource="{Binding Categories}" SelectedItem="{Binding SelectedCategory,Mode=TwoWay}">
   <telerik:RadContextMenu.ContextMenu>
     <telerik:RadContextMenu x:Name="CategoryContextMenu" Opened="CategoryContextMenu_Opened">
       <telerik:RadMenuItem Header="Aggiungi" />
     </telerik:RadContextMenu>
   </telerik:RadContextMenu.ContextMenu>
   <telerik:RadTreeListView.ChildTableDefinitions>
     <telerik:TreeListViewTableDefinition ItemsSource="{Binding Categories}" />
   </telerik:RadTreeListView.ChildTableDefinitions>
   <telerik:RadTreeListView.Columns>
     <telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Categoria" />
     <telerik:GridViewCheckBoxColumn DataMemberBinding="{Binding Positive}" Header="Positivo" />
   </telerik:RadTreeListView.Columns>
</telerik:RadTreeListView>

 Now, if I click on anything node, enter in CategoryContextMenu_Opened but GetClickedElement return null ever!

private void CategoryContextMenu_Opened(object sender, RoutedEventArgs e)
{
   RadTreeViewItem item = this.CategoryContextMenu.GetClickedElement<RadTreeViewItem>();
   if (item != null) //It never true!!!
   {
     viewModel.SelectedCategory = (LocalCategory)item.DataContext; //Can I do it?
    }
}

[Dario]

Hi guys,I have this XAML

<telerik:RadTreeListView AutoGenerateColumns="False" ItemsSource="{Binding Categories}" SelectedItem="{Binding SelectedCategory,Mode=TwoWay}">
    <telerik:RadContextMenu.ContextMenu>
      <telerik:RadContextMenu x:Name="CategoryContextMenu" Opened="CategoryContextMenu_Opened">
        <telerik:RadMenuItem Header="Aggiungi" />
      </telerik:RadContextMenu>
    </telerik:RadContextMenu.ContextMenu>
    <telerik:RadTreeListView.ChildTableDefinitions>
      <telerik:TreeListViewTableDefinition ItemsSource="{Binding Categories}" />
    </telerik:RadTreeListView.ChildTableDefinitions>
    <telerik:RadTreeListView.Columns>
      <telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Categoria" />
      <telerik:GridViewCheckBoxColumn DataMemberBinding="{Binding Positive}" Header="Positivo" />
    </telerik:RadTreeListView.Columns>
 </telerik:RadTreeListView>

null ever!

1.private void CategoryContextMenu_Opened(object sender, RoutedEventArgs e)
2.{
3.   RadTreeViewItem item = this.CategoryContextMenu.GetClickedElement<RadTreeViewItem>();
4.    if (item != null) //It never true!!!
5.    {
6.      viewModel.SelectedCategory = (LocalCategory)item.DataContext; //Can I do it?
7.     }
8. }

[Kalin]

Hi Dario,

If you need to get whole row you would need to look for TreeListViewRow item and if need only the clicked cell you would need to look for GridViewCell item:

var item1 = this.CategoryContextMenu.GetClickedElement<TreeListViewRow>();
var item2 = this.CategoryContextMenu.GetClickedElement<GridViewCell>();

Hope this helps.

Regards,
Kalin
Telerik

[Dario]

This it's clear, my question is why it is never initalized, into ContextMenu_Opened event the this.CategoryContextMenu.GetClickedElement return EVER null.

 

[Kalin]

Hi Dario,

The issue was that you were looking for RadTreeViewItem clicked item and there isn't such. RadTreeListView uses elements of type TreeListViewRow for the rows and GridViewCell for the cells.

Hope this helps.

Regards,
Kalin
Telerik

[Dario]

Perferct! Thank you!