Drag and Drop ListboxItems in WPF

Question

I am trying to figure out how to move the items in a pre-populated listbox with MediaElements up and down via mouse drags. I would appreciate any help. Thanks

Answer 1

With this dll:

 xmlns:ex="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions"

You can then use interaction triggers and call your method in the viewmodel.

   <i:Interaction.Triggers>
       <i:EventTrigger EventName="Drop">
          <ex:CallMethodAction TargetObject="{Binding }" MethodName="DocumentListBox_Drop" />
       </i:EventTrigger>
   </i:Interaction.Triggers>

And then in viewmodel:

 Public Sub DocumentListBox_Drop(sender As Object, e As DragEventArgs)         
        Dim droppedFilePaths As String() = TryCast(e.Data.GetData(DataFormats.FileDrop, True), String())
        If Not droppedFilePaths Is Nothing Then
            For Each filepath As String In droppedFilePaths

            Next
        End If
End Sub

You should have this dll in your list of references already, if not you may have to look for it on google. Also Note: there is a little more to all this then what I just showed you like making sure allowdrop is set to true and so forth.