Christof Nordiek

Hi,

I want to create a WebPart, that shows a TreeView. So i created a class that
derives from WebPart created an TreeView control therein and added it to the
Controls collection. I also added some root and child nodes. The TreeView
shows up in the WebPart allright and if I set the Expanded property to true
ot shows expanded. So far so good.

The only problem is, the expand / collaps buttons don't work. It shows
"error on the page" in the status bar, and in the details of the error it
says "childNode.1 is null or not an object"

Does anyone know, what's wrong and how to fox the problem?

Thanks
Christof