Re-sort WPF DataGrid after bounded Data has changed

Question

I am looking for a way to re-sort my DataGrid when the underlying data has changed.

(The setting is quite standard: Th

Answer 1

I cannot see any obviously easy ways, so I would try an Attached Behavior. It is a bit of a bastardization, but will give you what you want:

public static class DataGridAttachedProperty
{
     public static DataGrid _storedDataGrid;
     public static Boolean GetResortOnCollectionChanged(DataGrid dataGrid)
     {
         return (Boolean)dataGrid.GetValue(ResortOnCollectionChangedProperty);
     }

     public static void SetResortOnCollectionChanged(DataGrid dataGrid, Boolean value)
     {
         dataGrid.SetValue(ResortOnCollectionChangedProperty, value);
     }

    /// 

    /// Exposes attached behavior that will trigger resort
    /// 
    public static readonly DependencyProperty ResortOnCollectionChangedProperty = 
         DependencyProperty.RegisterAttached(
        "ResortOnCollectionChangedProperty", typeof (Boolean),
         typeof(DataGridAttachedProperty),
         new UIPropertyMetadata(false, OnResortOnCollectionChangedChange));

    private static void OnResortOnCollectionChangedChange
        (DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
    {
      _storedDataGrid = dependencyObject as DataGrid;
      if (_storedDataGrid == null)
        return;

      if (e.NewValue is Boolean == false)
        return;

      var observableCollection = _storedDataGrid.ItemsSource as ObservableCollection;
      if(observableCollection == null)
        return;
      if ((Boolean)e.NewValue)
        observableCollection.CollectionChanged += OnCollectionChanged;
      else
        observableCollection.CollectionChanged -= OnCollectionChanged;
    }

    private static void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
    {
      if (e.OldItems == e.NewItems)
        return;

      _storedDataGrid.Items.Refresh()
    }
}

Then, you can attach it via: