[Mono-winforms-list] NullReferenceException calling SWF.Control.set_AccessibleRole

[Rafael Teixeira]

Hi Nick,

First, I think you can't disclose such details of infragistics and
.NET code, that you may be obtaining from disassembling their
assemblies. I'm quite sure their licenses prohibit it.

For what I can help...

> But in MWF.Control, as I'm sure you know, it's doing:
>
> public AccessibleRole AccessibleRole {
>             set {
>                 AccessibilityObject.role=value;
>             }
>
> That doesn't look like a problem unless the AccessibleObject is for some
> reason not getting initialized before the set.

AcessibilityObject is here a get acessor that lazily creates on first
usage such object using the protected virtual method
CreateAccessibilityInstance to do so, that is why I asked if it was
overriden, as the default implementation simply creates an instance of
the Control.ControlAccessibleObject class, and therefore it never
should return a null (it would throw some other exception if bad
things wen't wrong on creating it).

You could try to put breakpoints by running MWF on .NET/VS, or use
some tracing or console messages while running on  Mono to help
pinpoint the location of the probable out-of-order initialization or
race condition.

The good thing about Mono is that you have the sources, so it may be
easier to find the problem and to devise/propose a solution...

:)

-- 
Rafael "Monoman" Teixeira
---------------------------------------
"The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man." George Bernard Shaw