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我正在做一些简单的应用程序重构以跟随MVVM,我的问题是如何将SelectionChanged事件从我的代码中移出到viewModel？我已经看了一些绑定元素到命令的例子,但是并没有完全掌握它.谁能帮忙解决这个问题.谢谢!

有人可以使用下面的代码提供解决方案吗？非常感谢!

public partial class MyAppView : Window 
{
    public MyAppView()
    {
        InitializeComponent();

        this.DataContext = new MyAppViewModel ();

        // Insert code required on object creation below this point.
    }

    private void contactsList_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        //TODO: Add event handler implementation here.           
        //for each selected contact get the labels and put in collection 

        ObservableCollection<AggregatedLabelModel> contactListLabels = new ObservableCollection<AggregatedLabelModel>();

        foreach (ContactListModel contactList in contactsList.SelectedItems)
        {
            foreach (AggregatedLabelModel aggLabel in contactList.AggLabels)
            {
                contactListLabels.Add(aggLabel);
            }
        }
        //aggregate the contactListLabels by name
        ListCollectionView selectedLabelsView …