MVVM - How ListView ItemClick Execute RelayCommand with Bindig

Question

I would like to add a command to my listview. When an item is clicked I would like to execute my relayCommand. Now I have these solution, it works, but I think it is not so MVVM :)

<ListView ItemsSource="{Binding Taxons}" IsItemClickEnabled="True" ItemClick="ListViewBase_OnItemClick">
       <ListView.ItemTemplate>
            <DataTemplate>
                  <TextBlock Text="{Binding Name}"/>
            </DataTemplate>
       </ListView.ItemTemplate>
</ListView>

Code Behind:

private void ListViewBase_OnItemClick(object sender, ItemClickEventArgs e)
{
       viewModel.TreeItemSelected.Execute(((Taxon)e.ClickedItem).Name);
}

I would like to use this way without any code behind, but it is not possible as the VS tells me:

<ListView ItemsSource="{Binding Taxons}" IsItemClickEnabled="True" ItemClick="{Binding TreeItemSelected}">
       <ListView.ItemTemplate>
            <DataTemplate>
                  <TextBlock Text="{Binding Name}"/>
            </DataTemplate>
       </ListView.ItemTemplate>
</ListView>

I use the following extra dll-s, but i dont want to install anything else if it possible. GalaSoft.MvvmLight.Extras.Win8 GalaSoft.MvvmLight.Win8

Can you suggest a solution to me?

Answer 1

Here's a working example :

<ListBox x:Name="name_here" 
      ItemsSource="{Binding your_item_source}"
      SelectedItem="{Binding your_selected_item, UpdateSourceTrigger=PropertyChanged}"
     ...
      >
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="MouseDoubleClick">
            <Command:EventToCommand Command="{Binding your_command_here}" 
                                CommandParameter="{Binding ElementName=name_here, Path=SelectedItem}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</ListBox>

It make use of Blend's Interaction triggers (you don't have to install blend, the dll is enough if you don't have it). also, if you're using the CommandParameter, bind the ElementName to the name of the control (in this example it's name_here )