Select the clicked Item of a RadTreeView
This tutorial will show you how to select the item that was clicked, while opening the RadContextMenu. In order to achieve this, you have to do the following things:
Handle the Opened event of the RadContextMenu
Get an instance of the clicked RadTreeViewItem
Set the SelectedItem of the RadTreeView
Before starting, here is a sample RadTreeView with a sample RadContextMenu attached.
<telerik:RadTreeView x:Name="radTreeView">
<telerik:RadContextMenu.ContextMenu>
<telerik:RadContextMenu x:Name="radContextMenu">
<telerik:RadMenuItem Header="Menu Option 1" />
<telerik:RadMenuItem Header="Menu Option 2" />
<telerik:RadMenuItem Header="Menu Option 3" />
</telerik:RadContextMenu>
</telerik:RadContextMenu.ContextMenu>
<telerik:RadTreeViewItem Header="Category1">
<telerik:RadTreeViewItem Header="Product1" />
<telerik:RadTreeViewItem Header="Product2" />
<telerik:RadTreeViewItem Header="Product3" />
</telerik:RadTreeViewItem>
<telerik:RadTreeViewItem Header="Category2" />
<telerik:RadTreeViewItem Header="Category3" />
<telerik:RadTreeViewItem Header="Category4">
<telerik:RadTreeViewItem Header="Product A" />
<telerik:RadTreeViewItem Header="Product B" />
<telerik:RadTreeViewItem Header="Product C" />
</telerik:RadTreeViewItem>
<telerik:RadTreeViewItem Header="Category5" />
</telerik:RadTreeView>
To handle the Opened event attach an event handler to it.
<telerik:RadContextMenu x:Name="radContextMenu1"
Opened="RadContextMenu_Opened">
<telerik:RadMenuItem Header="Menu Option 1" />
<telerik:RadMenuItem Header="Menu Option 2" />
<telerik:RadMenuItem Header="Menu Option 3" />
</telerik:RadContextMenu>
private void RadContextMenu_Opened( object sender, RoutedEventArgs e )
{
}
Private Sub RadContextMenu_Opened(sender As Object, e As RoutedEventArgs)
End Sub
In it get the instance of the clicked RadTreeViewItem by calling the GetClickedElement<T>() method of the RadContextMenu.
private void RadContextMenu_Opened(object sender, RoutedEventArgs e)
{
RadTreeViewItem item = this.radContextMenu.GetClickedElement<RadTreeViewItem>();
}
Private Sub RadContextMenu_Opened(sender As Object, e As RoutedEventArgs)
Dim item As RadTreeViewItem = Me.radContextMenu.GetClickedElement(Of RadTreeViewItem)()
End Sub
The last thing to do is to set the SelectedItem property of the RadTreeView to the instance of the RadTreeView item that has been clicked.
If you are having a dynamic data scenario, where the RadTreeView is bound to a collection, you have to set the SelectedItem property to the DataContext of the clicked RadTreeViewItem.
private void RadContextMenu_Opened(object sender, RoutedEventArgs e)
{
RadTreeViewItem item = this.radContextMenu.GetClickedElement<RadTreeViewItem>();
if (item != null)
{
this.radTreeView.SelectedItem = item;
}
}
Private Sub RadContextMenu_Opened(sender As Object, e As RoutedEventArgs)
Dim item As RadTreeViewItem = Me.radContextMenu.GetClickedElement(Of RadTreeViewItem)()
If item Is Nothing Then
Me.radTreeView.SelectedItem = item
End If
End Sub