WPF DataGrid programmatically go to First Row

Question

This is my code

Version 1

public void scrollIntoGrid(DataGrid grid)
        {
            object item = grid.Items[0];
            grid.SelectedItem = item;
            grid.ScrollIntoView(item);
            grid.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
            grid.SelectedIndex = 0;
            //DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);         
            //row.MoveFocus(new TraversalRequest(FocusNavigationDirection.Left));
            //row.MoveFocus(new TraversalRequest(FocusNavigationDirection.Up));
        }

Version 2

public void scrollIntoGrid(DataGrid grid)
        {
            object item = grid.Items[0];
            grid.SelectedItem = item;
            grid.ScrollIntoView(item);
            //grid.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
            //grid.SelectedIndex = 0;
            DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(grid.SelectedItem);
            row.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
            //row.MoveFocus(new TraversalRequest(FocusNavigationDirection.Up));
        }

and all iterations go to second row in grid and not the first.

Answer 1

coming back to this after some time, the solution I found working is on KeyUp event in text box.

if (e.Key == Key.Down)
 {
  object item = dgProductSaleInvSm.Items[0];
  dgProductSaleInvSm.SelectedItem = item;
  dgProductSaleInvSm.ScrollIntoView(item);
  DataGridRow row = (DataGridRow)dgProductSaleInvSm.ItemContainerGenerator.ContainerFromIndex(0);
 row.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
 }