LabVIEW 8.2 .NET Event Callback

[Joe_Gerhardstein]

I have an app that uses some custom .NET dlls for asynchronous communication.  This app uses a .NET event callback in LabVIEW for incoming messages.  This app worked fine in LabVIEW 8.0.1, but in LabVIEW 8.2.1, the callback is never triggered.

Any thoughts on the differences in 8.0 vs. 8.2 in how .NET event callbacks are handled?  The example callback VIs (using .NET front panel controls) work fine.

[Matt_W1]

I'm having an issue with .Net in 8.2.1 vs 8.0 as well
http://forums.ni.com/ni/board/message?board.id=170&message.id=243960

I'm not sure if it's different symptom of the same problem or a different problem entirely.
But it might offer some insight.

Matt W

[AdnanZ]

Hi Joe,

I hope you are doing well today! Is it possible for you to post an isolated version of this code which replicates the issue?

[Joe_Gerhardstein]

Adnan:

The .NET code communicates with proprietary hardware.  I'll look at it and see if there is a subset I can post that will function without the hardware, but without the hardware it may not be useful.

FYI: I opened a support request on this, #7154467.


Joe

[Matt_W1]

After working around the cause of my problem and messing around more with .NET I think I might have stumbled upon the same problem your having. I also wrote an example that shows the problem.

It's simular to the "NET Event Callback for DataWatcher", except it passes strings around, one version passes objects the other strings. The string version works but the object version doesn't, I think the object version is registered as a callback but is never run (hard to tell though).

Matt W

[Joe_Gerhardstein]

I went back in 8.2.1 this week, and everything is working fine now.  I have no idea what I did to get it to work, but I built an EXE this morning that even runs.  This was done in LV 8.2.1.

[Rudi_N]

Joe:

Please keep us posted on any issues you run into.

Regards,

Rudi N.