Hi, there

 Is there any way that I can get the vertical scrollbar in a datagrid control? Since I need to mannual scroll over the grid when some action is taken.

Thanks,

Ricky

Hi,

You can get a hold of the vertical Scrollbar as follow:

ScrollViewer sv = grid.Template.FindName( "PART_ScrollViewer", this.grid ) as ScrollViewer;
ScrollBar verticalScrollBar = sv.Template.FindName( "PART_VerticalScrollBar", sv ) as ScrollBar;

I tried this in order to set the verticalScrollBar.Value property manually, but it results in the scrollbar becoming defunct and operating strangely.  The thumb no longer slides, but scrolling is still possible.  I've attached a simple example project demonstrating this odd behaviour.  Press the 'Test' button then try and slide the thumb on the vertical ScrollBar.

Is this a bug - is there a solution?

Thanks,

Jason

This is a normal behaviour of the Scrollbar, it is not inherent to the Xceed Datagrid for WPF. To ensure yourself, you could use the ListBox as follow:

private void btnTest_Click(object sender, RoutedEventArgs e)
        {
          ScrollViewer sv = Page1.GetScrollViewer( dgcMyData );
          ScrollBar verticalScrollBar = sv.Template.FindName( "PART_VerticalScrollBar", sv ) as ScrollBar;
          verticalScrollBar.Value = 45; // verticalScrollBar.Value;
        }

        public static ScrollViewer GetScrollViewer( ListBox listBox )
        {
          Border scroll_border = VisualTreeHelper.GetChild( listBox, 0 ) as Border;
          if( scroll_border is Border )
          {
            ScrollViewer scroll = scroll_border.Child as ScrollViewer;
            if( scroll is ScrollViewer )
            {
              return scroll;
            }
            else
            {
              return null;
            }
          }
          else
          {
            return null;
          }
        }

The thumb will no longer move since its value is logically set on the ScrollViewer.

Ok, thanks for your clarification on that.  Is there any way of manually setting the scrollbar position then?

According to http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.rangebase.value.aspx the value is a get/set property and that "the slider and scrollbar controls have a thumb that is synchronized with the Value of the control".

Is there any way perhaps to get the thumb and set its value instead?