Hi,

I want to set the selected node in my treeview by the programm. I tried the following:

testTree.SetSelected(testTree.Selected);

So just select the selected Node again to invoke the function private void Tree_NodeClick(object sender, TreeEventArgs e)

But I get the error: Message: Unhandled Error in Silverlight 2 Application Object reference not set to an instance of an object.   at SLApp2.MainPage.Tree_NodeClick(Object sender, TreeEventArgs e)   at Liquid.Tree.RaiseEvent(TreeEventHandler handler, Object sender, TreeEventArgs args)   at Liquid.Tree.set_Selected(Node value)   at Liquid.Tree.SetSelected(Node node)

Anbody an idea how to just invoke the Tree_NodeClick function again for the selected node?

bilik

Hi Bilik,

You could try setting Selected = null before your call to SetSelected this should then raise the NodeClick event.

Thanks!

Hi dan,

I tried the following:

Node selected = ProductTree.Selected;

ProductTree.Selected = null;

ProductTree.SetSelected(selected);

But I get the same error message as above. It seems that the Tree_NodeClick function does not get the parameters it needs.

Bilik

Hi Dan,

Calling Tree.SetSelected(Node)

Raises the event "NodeClick"  Howerver, in the event, if you check the variable "e.Source" the source is Nothing. The source should be the "Node", because when the event is called by a mouse click, the "e.Source" is set.

Hi inexcon,

Thanks for pointing that out.  I have made the change to the code and the fix will be present in the next version.

Thanks!

Hi Dan,

This question is along these lines.

How do I send a click message to check the box of a specific node programatically?

would it be something like this?

testTree.SelectChild("10");

                    Node selected = testTree.Selected;

                    selected.CheckAll();