WPF: How to bind a command to the ListBoxItem using MVVM?

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Unfortunately, only ButtonBase derived controls have the possibility for binding ICommand objects to their Command properties (for the Click event).

However, you can use an API provided by Blend to map an event (like in your case MouseDoubleClick on the ListBox) to an ICommand object. 

<ListBox>
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseDoubleClick">
            <i:InvokeCommandAction Command="{Binding YourCommand}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</ListBox>

You’ll have to define: xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" and have a reference to System.Windows.Interactivity.dll.

— EDIT —
This is part of WPF4, but u can use Microsoft.Windows.Interactivity if you’re not using WPF4. This dll is from Blend SDK, which doesn’t require Blend, from here:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=f1ae9a30-4928-411d-970b-e682ab179e17&displaylang=en

Update: I found something that should help you. check this link on MVVM Light Toolkit which contains a walkthrough on how to do this, along with a link to the needed libraries. MVVM Light Toolkit is a very interesting framework for applying MVVM with Silverlight, WPF, and WP7.

Hope this helps 🙂

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