MenuItem IsEnable Binding Issue

[Shyu]

Hello telerik.
I am using RadControls for Silverlight Q1 2012 SP1.
And found there is a issue about RadMenuItem IsEnableProperty Binding.
I did a project like this.

<telerik:RadMenu>
            <telerik:RadMenu.Items>
                <telerik:RadMenuItem x:Name="test" Header="制御" IsEnabled="{Binding IsEnableMenu}" />
            </telerik:RadMenu.Items>
        </telerik:RadMenu>
        <Button Content="Test" Click="Button_Click"/>

public partial class MainPage : UserControl
    {
        MainViewModel _mainView;

        public MainPage()
        {
            InitializeComponent();


            this._mainView = new MainViewModel();

            this.DataContext = this._mainView;
        }

        private void HousasToolBarItem_Click(object sender, Telerik.Windows.RadRoutedEventArgs e)
        {
            this._mainView.IsEnableMenu = !this._mainView.IsEnableMenu;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this._mainView.IsEnableMenu = !this._mainView.IsEnableMenu;
        }
    }

public class MainViewModel : ViewModelBase
    {
        public bool IsEnableMenu
        {
            get { return isEnableMenu; }
            set
            {
                isEnableMenu = value;
                OnPropertyChanged("IsEnableMenu");
            }
        }
        private bool isEnableMenu;
    }

When I start the project, the menu IsEnableProperty is false, i clicked the button, it becomes true. When i click the button again, It never becomes false.

Was there something wrong with what i did?

[Kalin]

Hello Shyu,

Whenever you want to bind the IsEnabled property you should use a TwoWay binding. It is designed that way because of some limitations of Silverlight framework. Please try the following and should start working as expected:

<telerik:RadMenuItem x:Name="test" Header="制御" IsEnabled="{Binding IsEnableMenu, Mode=TwoWay}" />

Hope this helps.

Regards,
Kalin
Telerik