Double-clicking on a ListBox in MVVM

Here is a quick code snippet that demonstrates doubleclicking on a WPF ListBox in MVVV. Note: This is using AttachedCommandBehavior V2.

<ListBox Name="MyListBox">

<ListBox.Resources>

<Style
TargetType="{x:Type ListBoxItem}">

<Setter
Property="IsSelected"
Value="{Binding
Path=IsSelected, Mode=TwoWay}"/>

<Setter
Property="acb:CommandBehavior.Event"
Value="MouseDoubleClick" />

<Setter
Property="acb:CommandBehavior.Command"

Value="{Binding ElementName=Window1,
Path=DataContext.MyDoubleClickCommand}" />

<Setter
Property="acb:CommandBehavior.CommandParameter"
Value="{Binding}"
/>

</Style>

   


</ListBox.Resources>

</ListBox>

Key points to note:

• Setting the CommandParameter to "{Binding}" passes the item that is bound to this ListBoxItem as a parameter to the command we are calling (answering the question: "What item was double clicked?".
• Using a Style is a quick way to insert the stuff we want into each ListBoxItem.
• This example is also binding IsSelected so that we can determine the SelectedItem(s) from within the view model (this isn't required to make double click work... I just thought it was interesting to leave it in the code snippet since it took me a while to figure it out...)