How to do a refresh of a ListCollectionView without a reset

Question

Good morning,

 

I am working on a WPF application which is using an  ObservableCollection.

I have an ObservableCollection of object  ( ObservableCollection<FileData> data; ) which is binding with a WPF datagrid. I bind the both with thoses following instructions :

 

ListCollectionView collection = new ListCollectionView(data);
collection.GroupDescriptions.Add(new PropertyGroupDescription("PathFile"));
datagridFile.ItemsSource = collection;

 

It is working fine and I have on my main window a list of object sorting by "PathFile". By a contextual menu when I click on the file name on the window, I would like to reorder the files. For example put the first to the second position.  I do this by using those following instructions :

 

 private int m_indexSelectedToMove;

 private void MenuItem_Click(object sender, RoutedEventArgs e)
 {
      data.Move(m_indexSelectedToMove, m_indexSelectedToMove + 1);
      m_indexSelectedToMove = -1;
      var itemList = (ListCollectionView)datagridFile.ItemsSource;
      itemList.Refresh();
 }

 

But I noticed with debug that the command Refresh() reset the ListCollectionView and I would like to know how to do the same behavior without reset the data ?

 

Thank you in advance for any advice.