WPF DataGrid：绑定到父对象

Here is my code behind

这是我背后的代码

public partial class ChallanListView : UserControl
{
    public ObservableCollection<ChallanDS> challans = ChallanModel.GetChallansList();
    public ObservableCollection<QualityDS> qualities = ChallanModel.GetQualitiesList();

    public ChallanListView()
    {
        InitializeComponent();
        ChallansDataGrid.DataContext = this;
        ChallansDataGrid.ItemsSource = this.challans;
    }
}
public part