Hi!

First of all thanks for a great set of controls.

I was trying out the TreeView control but couldn't get the ScrollIntoPosition() function to work. I tried a workaround with treeView.SetSelected(treeView.Selected, true), where true is supposed to scroll into position, but this didn't work either.

The control works gret but when I move a node up and down I would really like the scroll to follow the selected node. If I display a node at the bottom and use a button to move it down the scroll needs to follow the node.

Is this function implemented yet? Am I perhaps using it incorrectly?

Hi,

This is a strange one.  I did I test of the ScrollIntoPosition() method and it works as expected.  How are you moving the nodes up and down?  Could you post your code or maybe email your project I I'll take a closer look?

Thanks!

I was trying to achive something like your demo of the TreeView with a separate Up and Down button that moves the selected node. Here is the code for move down:

private void MoveDownButton_Click(object sender, RoutedEventArgs e)

{

if(uxTreeView.Selected != null)

{

Node node = uxTreeView.Selected;

node.SwapNext();

uxTreeView.ScrollIntoPosition();

}

}

Say I selected a node right at the bottom part of the viewable area of my treeview and want to move this down one step (provided there are more nodes below). The node is then still selected but I can't see it. My assumption of ScrollIntoPosition() was that this would automatically scroll me down so that my selected node always is visible.

Hi,

Having tested it in your scenario there is a delay in Silverlight calculating a nodes new position when using the SwapNext/SwapPrevious methods which results in the ScrollIntoPosition() method failing.

The solution is to force Silverlight to recalculate the position by calling node.UpdateLayout() after the call to SwapNext() like this:

Node node = uxTreeView.Selected;

node.SwapNext();

node.UpdateLayout();

uxTreeView.ScrollIntoPosition();

Hope this helps!

That worked for me. Thanks!

Hi Dan,

I tried this but not working may be i worte in wrong event.

My requirement is when i expand last node which has more child nodes, need to auto scroll up and should be in visible area.

can you please help on this....

Hi,

The problem here is that when the node expand method is called the size of the child node collection is unknown until the layout of thie children has completed.  Have you tried to update the scroll position using the NodeExpanded event?

Thanks!