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Check/uncheck bug in context menu

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This is a migrated thread and some comments may be shown as answers.

hwsoderlund asked on 26 Mar 2009, 10:28 AM

I'm trying to make it so that only one menu item can be checked at any one time. Sort of like radio buttons. But when I uncheck menu items programmatically the change doesn't show until I mouse over the items. Below is some sample code that demonstrates the bug. To recreate:

Click the button to open the menu
Check the first item, then check the second
Mouse over the first item to see check mark disappear

    
            <UserControl x:Class="SilverlightApplication17.Page" 
        
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        
                         xmlns:teleriknav="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation" 
        
                         xmlns:telerikbase="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls" 
        
                         xmlns:telerikinput="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Input" 
        
                         Width="400" 
        
                         Height="300"> 
        
                <Grid x:Name="LayoutRoot" 
        
                      Background="White"> 
        
                    <Button Content="Open menu" 
        
                            Width="100" 
        
                            Height="30"> 
        
                        <teleriknav:RadContextMenu.ContextMenu> 
        
                            <teleriknav:RadContextMenu StaysOpen="True" 
        
                                                       ClickToOpen="True" 
        
                                                       EventName="Click" 
        
                                                       Placement="Bottom"> 
        
                                <teleriknav:RadContextMenu.Items> 
        
                                    <teleriknav:RadMenuItem Header="Item 1" 
        
                                                            IsCheckable="True"> 
        
                                    </teleriknav:RadMenuItem> 
        
                                    <teleriknav:RadMenuItem Header="Item 2" 
        
                                                            IsCheckable="True"> 
        
                                    </teleriknav:RadMenuItem> 
        
                                    <teleriknav:RadMenuItem Header="Item 3" 
        
                                                            IsCheckable="True"> 
        
                                    </teleriknav:RadMenuItem> 
        
                                </teleriknav:RadContextMenu.Items> 
        
                            </teleriknav:RadContextMenu> 
        
                        </teleriknav:RadContextMenu.ContextMenu> 
        
                    </Button> 
        
                </Grid> 
        
            </UserControl>

    
            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; 
        
            using Telerik.Windows; 
        
            using Telerik.Windows.Controls; 
        
            namespace SilverlightApplication17 
        
            { 
        
                public partial class Page : UserControl 
        
                { 
        
                    public Page() 
        
                    { 
        
                        InitializeComponent(); 
        
                        this.AddHandler(RadMenuItem.CheckedEvent, new RoutedEventHandler(RadMenuItem_CheckedChanged)); 
        
                        this.AddHandler(RadMenuItem.UncheckedEvent, new RoutedEventHandler(RadMenuItem_CheckedChanged)); 
        
                    } 
        
                    private void RadMenuItem_CheckedChanged(object sender, RoutedEventArgs e) 
        
                    { 
        
                        var radE = e as RadRoutedEventArgs; 
        
                        if (radE == null || radE.OriginalSource == null) 
        
                            return; 
        
                        var item = radE.OriginalSource as RadMenuItem; 
        
                        if (item.IsChecked) 
        
                        { 
        
                            //Uncheck all the other items 
        
                            var menu = item.ParentOfType<RadContextMenu>(); 
        
                            menu.Items.ToList().ForEach(obj => 
        
                            { 
        
                                var item2 = menu.ItemContainerGenerator.ContainerFromItem(obj) as RadMenuItem; 
        
                                if (item2.IsChecked && item2 != item) 
        
                                { 
        
                                    item2.IsChecked = false; 
        
                                } 
        
                            }); 
        
                        } 
        
                    } 
        
                } 
        
            }

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