topic Re: Adding Event Handler - Delete Graphic Element in ArcObjects SDK Questions

Adding Event Handler - Delete Graphic Element

deleted-user-VeC5jUIlNXtq — Thu, 05 Sep 2013 00:26:48 GMT

Hey all,

I've got a quick question regarding event handlers. I have a program to lock and unlock graphic elements in the page layout (text, etc...).

The issue is that "locked" (IElement.Locked = True) elements, can still be deleted, which I would like to prevent.

I have the code to prevent the delete, however I don't know how to add the actual event handler so that when I try to delete a locked element, it catches it and prevents it.

I guess this event handler should work independently of the actual lock/unlock Add-In, however I'm lost at where to begin.

Any assistance would be greatly appreciated (I'm a bit of an amateur at all of this so more detail is better).

Thanks, and let me know if more information is required for this.

Re: Adding Event Handler - Delete Graphic Element

NeilClemmons — Thu, 05 Sep 2013 13:01:58 GMT

The IGraphicsContainerEvents interface has the event you're looking for. You may not be able to prevent the actual delete from taking place but you can probably just add the element back.

Re: Adding Event Handler - Delete Graphic Element

deleted-user-VeC5jUIlNXtq — Fri, 06 Sep 2013 17:22:04 GMT

Thanks Neil,

I'll look at implementing this. Related question: do you know of any current issues with IElement.Locked?

I know that many years ago there was a bug associated with it, but I have no details (other than an old bug number which I'm unable to find any info on). I was curious if you (or anyone else) know of anything currently wrong with this property.

Thanks again!