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Bind to TabItem IsSelected problems

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TabControl
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Adiel
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Adiel asked on 25 Apr 2010, 04:19 PM
Hi
I have couple of tabs with ViewModel class for each.
I want to bind the IsSelected DP to a property in the VM.
Somehow the property not updated in the view model.

I've create a demo project very simple and straightforward.

The  xaml:

 <Grid x:Name="LayoutRoot" 
          Background="White">  
        <Controls:RadTabControl> 
            <Controls:RadTabItem x:Name="tab1" 
                                 Header="tab1" 
                                 IsSelected="{Binding Tab1 }">  
            </Controls:RadTabItem> 
            <Controls:RadTabItem Header="tab2" 
                                 x:Name="tab2" 
                                 IsSelected="{Binding Tab2}" /> 
        </Controls:RadTabControl> 
        <StackPanel HorizontalAlignment="Right" 
                    Margin="0,0,40,0">  
            <TextBlock Text="{Binding AA}" /> 
            <Button x:Name="Select" 
                    Content="Select Tab 1" 
                    Click="Select_Click" /> 
            <Button x:Name="Select1" 
                    Content="Select Tab 2" 
                    Click="Select1_Click" /> 
        </StackPanel> 
    </Grid> 

The code behinde:
 public partial class MainPage : UserControl  
    {  
        public MainPage()  
        {  
            InitializeComponent();  
            ViewModel = new vm();  
        }  
 
        public vm ViewModel  
        {  
            get { return DataContext as vm; }  
            set { DataContext = value; }  
        }  
        private void Select_Click(object sender, RoutedEventArgs e)  
        {  
            ViewModel.Tab1 = true;  
        }  
 
        private void Select1_Click(object sender, RoutedEventArgs e)  
        {  
            ViewModel.Tab2 = true;  
        }  
    } 

The view model:
 public class vm : INotifyPropertyChanged  
    {  
        private bool _tab1;  
        private bool _tab2;  
        public string AA  
        {  
            get 
            {  
                return Tab1 ? "Tab1" : "Tab2";  
            }  
            set { OnPropChanged("AA"); }  
        }  
        public bool Tab1  
        {  
            get { return _tab1; }  
            set 
            {  
                _tab1 = value;  
                OnPropChanged("Tab1");  
                OnPropChanged("AA");  
            }  
        }  
        public bool Tab2  
        {  
            get { return _tab2; }  
            set 
            {  
                _tab2 = value;  
                OnPropChanged("Tab2");  
                OnPropChanged("AA");  
            }  
        }  
        private void OnPropChanged(string propName)  
        {  
            if (PropertyChanged != null)  
                PropertyChanged(thisnew PropertyChangedEventArgs(propName));  
        }
        #region INotifyPropertyChanged Members  
 
        public event PropertyChangedEventHandler PropertyChanged;
        #endregion  
    } 

Any ideas?
Thanks

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Vladislav
Telerik team
answered on 28 Apr 2010, 08:12 AM
Hello Adiel,

Can you please review the attached project?
Basically I just added "Mode=TwoWay" in the binding expressions for "IsSelected" properties of the RadTabItems.

Please, let us know if this solution works for you. 

Kind regards,
Vladislav
the Telerik team

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Adiel
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Vladislav
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