.NET Month Calendar control and User Events

[Eric1977]

I am playing around with creating a user event for the .NET MonthCalendar Control. I would like for the user event to fire when a user selects a day on the Month Calendar control, however, I cant seem to even see a list of user events when I select the Register for Events - User Events pick list.

Am I doing something incorrectly here? This is my first time using the User Events portion of LabVIEW (actually, I am looking to enhance one of my existing programs) and I'd figure I'd play in a VI first.

[ben64]

With .net control you have to register an Event Callback. You can trig a user event from the callback vi or perform the action in the callback vi.

Ben64

[Eric1977]

Another dumb question. How do I get the DateSelected to trigger an event in my Event Handler (or really, anywhere) so I can place the date into an indicator?

[ben64 · Accepted solution]

You can pass user parameters to the Callback VI. In the attached example I'm passing a string indicator reference. You can expand the Reg Event Callback node to pass more than one user parameter.

Ben64

[Eric1977]

Ben - Thank you for the help. Learned something too!

[_EMG_]

Hi,

....could you kindly post the VIs converted to LV2015? Thanks in advance!!

[arob]

how can i edit the code for the callback vi? it seems to be running even though it isnt

[StevenD]

Huh.... Seems to be a bug with .NET callback in LabVIEW. I had the same behavior, not being able to edit the callback VI after running the top level VI. This is from NI's own example located at "C:\Program Files (x86)\National Instruments\LabVIEW 201x\examples\Connectivity\Dot NET"

Before running "Passing Data to a .NET Event Callback.vi"

During execution.

After hitting stop, the callback VI is uneditable.

LV 2019 32 bit

[drjdpowell]

The workaround is to call GC.collect, shown here:

https://forums.ni.com/t5/LabVIEW/net-event-callback-VIs-Why-do-they-never-leave-running-state/m-p/32...