Message: AddToGroup() takes exactly 3 arguments (2 given)?

Rhino Developer
,
1

I don’t get it…

Rhino.DocObjects.Tables.GroupTable.AddToGroup(sc.doc.Groups.Add(), objID)

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2

The error message is not helpful, but what you’re doing is calling an instance method like a static method. The group table exists in the context of a Rhino document.

sc.doc.Groups.AddToGroup(sc.doc.Groups.Add(), objID)

sc.doc is the instance of the document you need to get the group table of, then call AddToGroup on that.

3

No idea what this means. I’m learning rhinocommon from no object oriented programming background. :confused:

Did this instead:

            grpIdx = sc.doc.Groups.Add()
            pnlref.Attributes.AddToGroup(grpIdx)
            pnlref.CommitChanges()
4

No worries. An instance method is where you have an object (sc.doc.Groups in this case), then you call a method on it, sc.doc.Groups.AddToGroup(...)

In your original post, it said Rhino.DocObjects.Tables.GroupTable.AddToGroup(sc.doc.Groups.Add(), objID) and then there is no instance, you’re just using the full namespace+class name, Rhino.DocObjects.Tables.GroupTable.

HTH