How to Add Node to Group by code?

catamount · November 5, 2010, 11:41am

Hi Walter,

How can I add/remove a Node to a Group by code?

I need to remove a Node from a Group and put to another Group by code.

Thanks!

walter · November 5, 2010, 2:10pm

myDiagram.StartTransaction("change subgraph membership"); var ndata = someNode.Data as NodeData; var gdata = someGroup.Data as NodeData; ndata.SubGraphKey = gdata.Key; myDiagram.StartTransaction("change subgraph membership");

Or you could call Graph…Model.SetGroupNodeKey.

catamount · November 5, 2010, 2:57pm

Thanks, Walter!

But when I use the code aboe, the Node is still sitting in the previous Group. What should I do if I want the Node to be drawn inside the new Group?

Thanks!

walter · November 5, 2010, 3:14pm

Well, the Group.Layout is invalidated and then performed, so it’s responsible.

If you haven’t set the Group.Layout, the default layout is the same as for the Diagram.Layout – it just tries to make sure each node has a Location. Since your node already has a Location, it isn’t changed.

So you’ll need to set the Node.Location, either directly or (if the go:Node.Location is data-bound) by setting the …NodeData.Location property.