Question

There are some posts discussing adding data-binding ability for ListView.SelectedItems with non-trivial amount of code. In my scenario I don’t need to set it from the ViewModel, just getting selected items in order to perform action on them and it is triggered by command so push update is also not necessary.

Is there a simple solution (in terms of lines of code), maybe in code-behind? I am fine with code-behind as long as View and ViewModel don’t need to reference each other. I think this is a more generic question: “best practice for VM to get data from the View on-demand“, but I can’t seem to find anything…

Answer 1

To get the SelectedItems only when a command is executed then use CommandParameter and pass in the ListView.SelectedItems.

<ListBox x:Name="listbox" ItemsSource="{Binding StringList}" SelectionMode="Multiple"/>
<Button Command="{Binding GetListItemsCommand}" CommandParameter="{Binding SelectedItems, ElementName=listbox}" Content="GetSelectedListBoxItems"/>