I'm having issues clearing a Selection in either InkOverlay or InkPicture.
I'm trying to create an application that lets you select strokes within an
InkPicture, perform an action with those selected strokes via a button press,
and then clear the selection. Unfortunately, the following command never
works:

inkPicture.Selection.Clear();

Instead of emptying the selected strokes container, .Clear() does nothing.
I've also tried to set the Selection to null, but that only produces a
NullReferenceException.

Any ideas as to how I can empty the Selection?

Thanks,
-Aaron

Hey Aaron, whenever working with a read/write property that takes a Strokes
object, you can be pretty sure that modifying it will do nothing.

For example, if you tried to do Ink.Strokes.Clear() it would similarly have
no effect. The reason being, the Strokes object is more like a recordset.
It's a collection of references to strokes. When you access the Selection
property, you are getting a copy of that collection and clearing it doesn't
actually modify the selection. It's not exactly the most intuitive behavior,
but it comes in handy sometimes.

But to achieve what you're trying to do, you can set the selection to an
empty Strokes collection.

Strokes emptyStrokes = inkPicture.Ink.CreateStrokes();
inkPicture.Selection = emptyStrokes;

Let me know if this helps.

--
Josh Einstein (Tablet PC MVP)
Einstein Technologies
Tablet Enhancements for Outlook - Try it free: www.tabletoutlook.com


"Aaron W." <Aaron W.@discussions.microsoft.com> wrote in message
news:80E4E41F-42F8-492A-97DD-3A30573BB90B@microsoft.com...
> I'm having issues clearing a Selection in either InkOverlay or InkPicture.
> I'm trying to create an application that lets you select strokes within an
> InkPicture, perform an action with those selected strokes via a button
> press,
> and then clear the selection. Unfortunately, the following command never
> works:
>
> inkPicture.Selection.Clear();
>
> Instead of emptying the selected strokes container, .Clear() does nothing.
> I've also tried to set the Selection to null, but that only produces a
> NullReferenceException.
>
> Any ideas as to how I can empty the Selection?
>
> Thanks,
> -Aaron