How do I run MATLAB code after an event from a .NET class?

I am loading a .NET class into MATLAB from an assembly using “NET.addAssembly”. The .NET class has an event, and I want to run some MATLAB code based on this event taking place.

Answer 1

[MathWorks Support Team]

In order to run MATLAB code based on a .NET event, you can add a listener for the event and run code in a custom callback function. You can use the anonymous function syntax to pass in any of your own MATLAB data into the callback function.

Here is a template of what the code would look like:

myData = 0 

function myCallback(src, eventData, myData)
// perform action
end 

listener = addlistener(class, ‘Event’, @(src, eventData) myCallback(src, eventData, myData)); 

• where "class" is the name of the .NET class 
• "Event" is the name of the event of the .NET class you want to listen to
• and "myData" is some data from the MATLAB workspace you want to use in the callback

When "Event" in the .NET class "class" occurs, "myCallback" will be called, and "eventData" will contain any properties from the .NET event.

Here are some documentation pages that explain using .NET events and listeners in MATLAB:

https://www.mathworks.com/help/releases/R2023a/matlab/matlab_external/use-net-events-in-matlab.html

https://www.mathworks.com/help/releases/R2023a/matlab/matlab_oop/listener-callback-functions.html#bu0abkz