how to handle WPF listbox selectionchanged event using MVVM

Question

I am trying to perform listbox changed event in WPF using MVVM. Please let me know how to do this selectionchanged event.

Answer 1

You can do it using

1. Add reference to System.Windows.Interactivity in your project
2. in XAML add xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

Then

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