Invalid CommandBar button reference, Need Workaround for KB 230876

[A Johnson]

I'm developing several office addin applications with VS
2003 in C#, primarily for Word, and have run into the
issue outlined in the Knowledge Base article 230876.

I'm trying to Enable/Disabling several buttons in my
custom menu and toolbar during the application life cycle
but after several documents are opened and closed I
receive error when referencing the button object, Invalid
object.

I catch the error and use the suggested FindControl()
(tried using the CommandBar.Controls[] collection as well)
to get another reference to the object. This works but
then the event hander stops and the buttons no longer
respond to user interaction. If I re-register the Click
event (remove then add), the next time the user clicks I
get 2 events.

I'd appreciate any insight into a workaround to this known
issue in the office applications. I have sample code if
needed.

Thanks,
Al

 

[Linas Mikutaitis]

Hi,

I have the same problem with Word 2k. Have you found any workaround or
solution?

Thanks,
LM

 

[A Johnson]

No resolution yet. I've moved on for now but will need to
address it soon. My next step is to use a support
incident and see what MS has to say. If I get a
resolution I'll post back.

Al

-----Original Message-----
Hi,

I have the same problem with Word 2k. Have you found any workaround or
solution?

Thanks,
LM

I'm developing several office addin applications with VS
2003 in C#, primarily for Word, and have run into the
issue outlined in the Knowledge Base article 230876.

I'm trying to Enable/Disabling several buttons in my
custom menu and toolbar during the application life cycle
but after several documents are opened and closed I
receive error when referencing the button object, Invalid
object.

I catch the error and use the suggested FindControl()
(tried using the CommandBar.Controls[] collection as well)
to get another reference to the object. This works but
then the event hander stops and the buttons no longer
respond to user interaction. If I re-register the Click
event (remove then add), the next time the user clicks I
get 2 events.

I'd appreciate any insight into a workaround to this known
issue in the office applications. I have sample code if
needed.

Thanks,
Al

.

 

[AlfontzCel]

I have a resolution to this issues as suggested by MS Support
Use the CommandBar.FindControl method to get a temp object every time you need access to the button. It’s fairly fast and I’ve noticed only a small performance hit. Note don’t use the CommandBars.FindControl, call the method associated with the toolbar you want.
Psudo code
public bool Enable

se

cbb = CommandBars[“MyToolbarâ€].FindControl(…,“MyButtonTagâ€,…)
cbb.Enabled = value



Also I’m working with C# and I needed to cache the CommandBarControl object returned from the Add method and never reassign it. Otherwise the GC will release the object along with the Click event registration


----- Linas Mikutaitis wrote: ----

Hi

I have the same problem with Word 2k. Have you found any workaround o
solution

Thanks
L

I'm developing several office addin applications with V

2003 in C#, primarily for Word, and have run into th
issue outlined in the Knowledge Base article 230876

I'm trying to Enable/Disabling several buttons in m

custom menu and toolbar during the application life cycl
but after several documents are opened and closed
receive error when referencing the button object, Invali
object

I catch the error and use the suggested FindControl(

(tried using the CommandBar.Controls[] collection as well
to get another reference to the object. This works bu
then the event hander stops and the buttons no longe
respond to user interaction. If I re-register the Clic
event (remove then add), the next time the user clicks
get 2 events

I'd appreciate any insight into a workaround to this know

issue in the office applications. I have sample code i
needed

Thanks

A

 

[Linas Mikutaitis]

Thanks a lot! It really did help.

I have a resolution to this issues as suggested by MS Support.
Use the CommandBar.FindControl method to get a temp object every time you

need access to the button. It's fairly fast and I've noticed only a small
performance hit. Note don't use the CommandBars.FindControl, call the
method associated with the toolbar you want.

Psudo code:
public bool Enabled
{
set
{
cbb = CommandBars["MyToolbar"].FindControl(.,"MyButtonTag",.);
cbb.Enabled = value;
}
}

Also I'm working with C# and I needed to cache the CommandBarControl

object returned from the Add method and never reassign it. Otherwise the GC
will release the object along with the Click event registration.

----- Linas Mikutaitis wrote: -----

Hi,

I have the same problem with Word 2k. Have you found any workaround or
solution?

Thanks,
LM

I'm developing several office addin applications with VS

2003 in C#, primarily for Word, and have run into the
issue outlined in the Knowledge Base article 230876.

I'm trying to Enable/Disabling several buttons in my

custom menu and toolbar during the application life cycle
but after several documents are opened and closed I
receive error when referencing the button object, Invalid
object.

I catch the error and use the suggested FindControl()

(tried using the CommandBar.Controls[] collection as well)
to get another reference to the object. This works but
then the event hander stops and the buttons no longer
respond to user interaction. If I re-register the Click
event (remove then add), the next time the user clicks I
get 2 events.

I'd appreciate any insight into a workaround to this known

issue in the office applications. I have sample code if
needed.

Thanks,

Al