WPF TreeView focusing on newly added item

Question

I have a sorted tree view with a lot of item. When I am adding a new item I would like the newly added item to be selected and shown on the screen. For example: if I am seeing the first 10 items on the screen and the new item is added on 20th position then the view should change to present the new added item (it can be the first one on the screen, the last one or in the middle - it doesn't matter). I am able to get selection working after reading some blog posts. Please help me to find out how to achieve the desired functionality concerning showing on the screen.

Lukasz Glaz

Answer 1

If you already got the TreeViewItem corresponding to your newly added item, all you have to do is to call yourItem.BringIntoView().

Answer 2

I suggestion you take a look at this article where the author show how to use an attached behavior. With this behavior, you can do everything in XAML:

 <TreeView.ItemContainerStyle>
  <Style TargetType="{x:Type TreeViewItem}">
    <Setter 
      Property="local:TreeViewItemBehavior.IsBroughtIntoViewWhenSelected" 
      Value="True" 
      />
    </Setter>
   </Style>
  </TreeView.ItemContainerStyle>

Where IsBroughtIntoViewWhenSelected is an attached property.