Does WPF DataGrid fire an event when a row is added / removed?

Question

I wish to recalculate things everytime a DataGrid gets more rows or some are removed. I tried to use the Loaded event, but that was fired only once.

I found

Answer 1

If you want you can go down the RowUnloading route as others have described here, however note that this event fires also every time a row is losing focus.

However by playing around I found that when a row is removed the SelectedItem property of the grid is null while the CurrentItem property is not null, and so far I have seen this combination only for a deleted row, (although I can't guarantee that I have not missed an exotic situation... however for the basic situations of moving away from the row I have not seen it so far).

So when can use the following code to filter for deleted rows only:

private void CategoriesGrid_UnloadingRow(object sender, DataGridRowEventArgs e)
{     
        if (((DataGrid)sender).SelectedItem != null || ((DataGrid)sender).CurrentItem == null)
        {
            return;
        }

        // The rest of your code goes here
}