Bind a ICommand to a WPF tabcontrol/tabitem using XAML (MVVM)

I have a WPF 3.5 app built using MVVM pattern. I have a tabcontrol and I want to excecute an ICommand on the view model when the user clicks a certain tab (jn my case the "Preview" tab). How do I hook up my ICommand to the tabitem or tabcontrol using just the XAML? I am using M开发者_Go百科VVM so I dont want to use events and get filthy, dirty code in the code-behind.

I think Im missing something simple here! Thanks,P

Please refer this article : hooking up commands to events

Or you can use this approach

You should use InvokeCommandAction, Looks like this:

        <TabItem Header="TabItem">
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="MouseLeftButtonDown">
                    <i:InvokeCommandAction Command="SomeCommand"/>
                </i:EventTrigger>
            </i:Interaction.Triggers>
            <Grid />
        </TabItem>

Be sure to include the xmlns in the top:

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

and of course to reference System.Windows.Interactivity (new in WPF4)