I am using a DataGridControl with the ItemSource bound to a DataGridCollectionViewSource.  When I change the DataGridCollectionViewSource.ItemsSource I would like to reselect a specific Row if it still resides in the Grid.

My code looks like this:

  // Rerun last query to get changes
  ReRunLastQuery();
  ipIssueGrid.Items.Refresh();

  // Get Grid to rebind
  DataGridCollectionView viewSource = (DataGridCollectionView)ipIssueGrid.ItemsSource;
  viewSource.Refresh();
  ipIssueGrid.Items.Refresh();

  // Select Added Issue
  foreach (IpIssueQuery ipQuery in ipIssueGrid.Items)
  {
      if (ipQuery.IpIssue.IpIssueId == ipIssueToAdd.IpIssueId)
      {
          ipIssueGrid.CurrentItem = ipQuery;
          ipIssueGrid.SelectedItem = ipQuery;
          break;
      }
  }

I see that the DataGridCollectionViewSource has seen my OnPropertyChanged() event for the ItemSource and has called my Get Property before I set my CurrentItem and SelectedItem but it looks like the Grid hasn't really rebuilt it's ItemSource and I end up with the 1st row in the grid always selected.

 Any suggestions?

I have a similar issue. I have tried iterating through the grid items using Dispatcher with a low priority but I can't get that to work as the rows are always null because the grid is probably still updating or whatever. I have come to the conclusion that you can't adequately set a CurrentItem in the grid and have thus swapped the grid out and redesigned the GUI to not use a grid. Annoying, as I have wasted a lot of time trying to do something which a grid should be able to do but I feel a lot happier now I have abandoned using a grid.

Calling dataGrid.UpdateLayout(); will force the rows to load so that it's ready for you do the row selection, but it slows down the load time tremendously (by about 300% for me).

For me, I was trying to auto fit the width of all columns as soon as a new dataset was assigned to the grid, but I found that increase in loading time was not worth the feature, so I dropped the idea of doing any sort of work on the grid when it is first loaded with data.