topic Re: Restore the Previous selectionset in .NET Forum

Restore the Previous selectionset

Anonymous — Thu, 26 Mar 2015 15:35:28 GMT

Hi all,

I often use Editor.SelectAll() (with a filter) to collect Entities in the drawing, cause it's much faster than iterating through all ObjectIds in the database and open each Entity to check it's properties.

But now I have the following scenario: I use a Document.CommandEnded eventhandler to trap the MOVE command and update some BlockReferences afterwards. What happens is this:

The user selects a Polyline and moves it
My code collects some BlockReferences (with Editor.SelectAll) and updates them, not noticeable for the user.
The user starts MOVE again and types "P" (Previous). Not the Polyline is selected, but the BlockReferences instead.

For now I handle this by clearing the last selectionset, like this: draw a point, call Editor.SelectLast(), then erase the point. I'm not using Editor.SetImpliedSelection(new ObjectId[0]) since it does not clear the Previous selection (due to Application-/DocumentContext issues?).

But the user is not satisfied with an empty set, he wants his previous selection back.

So my question is: Is it possible to prevent the resulting SelectionSet from being stored as the last Selectionset in the drawing, and leave the Previous selection intact?

Also tried this workaround:

Call Editor.SelectPrevious() to collect the Polyline in a SelectionSet SS -> works very well
Collect the BlockReferences with Editor.SelectAll()
Using Editor.SetImpliedSelection(SS) -> doesn't do anything, the collection of BlockReferences still is the Previous selection

I hope someone has a solution or workaround for this.

Re: Restore the Previous selectionset

Anonymous — Fri, 27 Mar 2015 07:25:10 GMT

I have no knowledge of NET (but I wish) so I can only try some logic workaround

could you use your SS to make a new selection and have SelectPrevious get it?

Re: Restore the Previous selectionset

Anonymous — Mon, 30 Mar 2015 10:48:51 GMT

That is exactly what I try in my workaround.

Re: Restore the Previous selectionset

Anonymous — Tue, 31 Mar 2015 10:46:35 GMT

I got SetImpliedSelection working now, but also conclude this is no solution. The entities get selected in the editor, but are not stored as a (previous) selectionset in the drawing. Only a next AutoCAD command will pick these entities and store it as a selectionset.

Maybe I can use COM for this, but then it would be my first COM implementation in .NET since five years.

Dear Autodesk people, will there be a .NET method Editor.SetPreviousSelection(SelectionSet ss) in the future?