Getting Listbox Item Index from Button Click

问题

So I'm using a button in the DataTemplate of my Listbox ItemTemplate. Any ideas how I would grab the index of the item of the Listbox from the button click? I can't see to grab the button's parent.

<ListBox.ItemTemplate>
            <DataTemplate DataType="{x:Type local:Img}">
                <Button Click="lstButton_Click">...

回答1:

     private void lstButton_Click(object sender, RoutedEventArgs e)
     {
                Button button = sender as Button;           
                int index = _myListBoxName.Items.IndexOf(button.DataContext);
//or try this
                index = _myListBoxName.ItemContainerGenerator.IndexFromContainer(button.DataContext);
     }

回答2:

You could add a Index property in your view model and set it when you add the view model object into your collection. And then you can access it in your event handler.

private void lstButton_Click(object sender, RoutedEventArgs e)
    {
        Img t = (sender as Button).DataContext as Img
        //Access t.Index here
    }

来源：https://stackoverflow.com/questions/17057022/getting-listbox-item-index-from-button-click