How to bind multiple selection of listview to viewmodel?

Question

I am implementing a listview, and a button next to it. I have to be able that when i select multiple items in a listview, and then click on a button, then the selected items

Answer 1

What you can do is you can handle the Button_Click(...) in your code-behind. Then in that code-behind method you can create a List of selected items by iterating over the selected items of the listView.

Since it is allowed to access the ViewModel from the View you can now call a method on your ViewModel and pass the list of selected items as a parameter.

I'm not sure if this would also work with Bindings only, however it is not bad practice to use code-behind as well.

Example Code:

public void Button_Click(object sender, EventArguments arg)
{
  List mySelectedItems = new List();

  foreach(ListViewItem item in myListView.SelectedItems)
  {
    mySelectedItems.Add(item);
  }

  ViewModel.SomeMethod(mySelectedItems);
}

EDIT

Here is a minimalist example, XAML:

CODE-BEHIND:

public void Button_Click(object sender, EventArguments arg)
    {
      List mySelectedItems = new List();

      foreach(Car item in myListView.SelectedItems)
      {
        mySelectedItems.Add(item);
      }

      ViewModel.SomeMethod(mySelectedItems);
    }