WPF Routed Command with Bindings per-Tab

Question

I intended to disable and enable the Buttons outside the TabControl, just like those inside the TabItem when the current tab is changed. But the CommandBindings of the TabIt

Answer 1

MSFT gave me the correct answer in their WPF forum, here (http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/bb3d1eb1-96fa-4fbc-beda-799613acb9f7)

<StackPanel>
     <StackPanel FocusManager.IsFocusScope="True">
         <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
         <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
     </StackPanel>
     <TabControl>
         <TabItem Header="tabItem1" Name="tabItem1">
             <TabItem.CommandBindings>
                 <CommandBinding Command="local:Window8.MyCommand1" Executed="ExecuteMyCommand" />
             </TabItem.CommandBindings>
             <StackPanel>
                 <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
                 <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
             </StackPanel>
         </TabItem>
         <TabItem Header="tabItem2" Name="tabItem2">
             <TabItem.CommandBindings>
                 <CommandBinding Command="local:Window8.MyCommand2" Executed="ExecuteMyCommand"/>
             </TabItem.CommandBindings>
             <StackPanel>
                 <Button Content="MyCommand1" Command="local:Window8.MyCommand1" />
                 <Button Content="MyCommand2" Command="local:Window8.MyCommand2" />
             </StackPanel>
         </TabItem>
     </TabControl>
</StackPanel>

Answer 2

Your don't have any code that could disable buttons. You can do it in several ways:

1. Define CanExecute event handler.

<CommandBinding Command="local:MainWindow.MyCommand1" 
        Executed="ExecuteMyCommand" 
        CanExecute="MyCommand_CanExecute"/>

Code behind:

private void MyCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
    e.CanExecute = tabItem1.IsSelected;
}

2. Bind button IsEnabled property to tab item IsSelected property

<Button IsEnabled="{Binding ElementName=tabItem1, Path=IsSelected}" 
        Content="MyCommand1" Command="local:MainWindow.MyCommand1" />

Answer 3

Is this all the code?

You have a special CanExecute defined, that disables the MyCommandsX ?
Or you have a binding on the Enabled Property of the bound buttons, and you implement INotifyPropertyChanged or something?

Or why should they be enabled/disabled in your code sample?
I you ask me, I wouldn't expect the code to disable the buttons..

Update 1:

You could enable the buttons the same way you did it, by adding the command bindings in the surrounding stackpanel for example.

    <StackPanel>
    <StackPanel.CommandBindings>
            <CommandBinding Command="local:MainWindow.MyCommand1"  
                            Executed="ExecuteMyCommand" />
    </StackPanel.CommandBindings>
    <Button Content="MyCommand1" Command="local:MainWindow.MyCommand1" />
    <Button Content="MyCommand2" Command="local:MainWindow.MyCommand2" />
    <TabControl>

You can use the CanExecute part of the command binding to verify the conditions under which the bound buttons enabled. Instead you should handle the command itself I think.