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[Solved] Bug: RadTreeView cannot be enabled once it's been disabled

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TreeView

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hwsoderlund asked on 01 Dec 2008, 01:52 PM

Once IsEnabled has been set to false, it cannot be enabled again. Here's an example:

    
            <UserControl x:Class="SilverlightApplication4.Page3" 
        
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                         xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView" 
        
                         xmlns:teleriknav="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation" 
        
                         xmlns:telerikbase="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls" 
        
                         Width="400" 
        
                         Height="300"> 
        
                <Grid x:Name="LayoutRoot" 
        
                      Background="White"> 
        
                    <StackPanel> 
        
                        <teleriknav:RadTreeView x:Name="RadTreeView1"> 
        
                            <teleriknav:RadTreeView.Items> 
        
                                <teleriknav:RadTreeViewItem Header="node 1"> 
        
                                    <teleriknav:RadTreeViewItem.Items> 
        
                                        <teleriknav:RadTreeViewItem Header="node 1 - 1"></teleriknav:RadTreeViewItem> 
        
                                        <teleriknav:RadTreeViewItem Header="node 1 - 2"></teleriknav:RadTreeViewItem> 
        
                                    </teleriknav:RadTreeViewItem.Items> 
        
                                </teleriknav:RadTreeViewItem> 
        
                                <teleriknav:RadTreeViewItem Header="node 2"> 
        
                                    <teleriknav:RadTreeViewItem.Items> 
        
                                        <teleriknav:RadTreeViewItem Header="node 2 - 1"></teleriknav:RadTreeViewItem> 
        
                                        <teleriknav:RadTreeViewItem Header="node 2 - 2"></teleriknav:RadTreeViewItem> 
        
                                    </teleriknav:RadTreeViewItem.Items> 
        
                                </teleriknav:RadTreeViewItem> 
        
                            </teleriknav:RadTreeView.Items> 
        
                        </teleriknav:RadTreeView> 
        
                        <Button Content="toggle" Click="Button_Click"></Button> 
        
                    </StackPanel> 
        
                </Grid> 
        
            </UserControl>

And the code-behind:

    
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Net; 
        
            using System.Windows; 
        
            using System.Windows.Controls; 
        
            using System.Windows.Documents; 
        
            using System.Windows.Input; 
        
            using System.Windows.Media; 
        
            using System.Windows.Media.Animation; 
        
            using System.Windows.Shapes; 
        
            namespace SilverlightApplication4 
        
            { 
        
                public partial class Page3 : UserControl 
        
                { 
        
                    public Page3() 
        
                    { 
        
                        InitializeComponent(); 
        
                    } 
        
                    private void Button_Click(object sender, RoutedEventArgs e) 
        
                    { 
        
                        RadTreeView1.IsEnabled = !RadTreeView1.IsEnabled; 
        
                    } 
        
                } 
        
            }

11 Answers, 1 is accepted

Accepted

answered on 01 Sep 2009, 01:08 PM

Hi Folks,

I'm working on a silverlight 2.0 project and have been using the 2009.1.526.1020 version of the "RadControls for Silverlight" up until now. Today I added two methods to my main user control which set all child user controls of this control to disabled/enabled:

internal

void OpenPopUp(string headerText, PopUpContent popUpContent)

{

this.PopUpContent = popUpContent;

this.PopUpHeader = headerText;

this.basePopUp.Visibility = Visibility.Visible;

this.ucNavigation.IsEnabled = false;

this.ucProperties.IsEnabled = false;

this.ucRollupGeneral.IsEnabled = false;

this.ucTerritories.IsEnabled = false;

}

internal void ClosePopUp()

{

this.ucNavigation.IsEnabled = true;

this.ucProperties.IsEnabled = true;

this.ucRollupGeneral.IsEnabled = true;

this.ucTerritories.IsEnabled = true;

this.basePopUp.Visibility = Visibility.Collapsed;

}

The child user control called ucNavigation uses a RadTreeView to display data. Disabling the RadTreeView works like a charm, but if I set the parent control back to IsEnabled = true, the RadTreeView remains partly disabled. By partly I mean, that it remains disabled for mouse input but not for keyboard input and it is stuck in the "Disabled" visual state.

After reading this tread, I updated to the 2009.2.701.1020 version of the "RadControls for Silverlight" and I'm still experiencing this phenomenon. What am I doing wrong?
Could somebody please enlighten me?

Christian