How can I access .net assembly Enums?

I have a Net assembly with Enums like below: FPGA3_Library.InitiateBoard+FPGABoardStates

In Matlab R2016a, I can directly access it by using enumtest = FPGA3_Library.FPGABoardStates;

But in Matlab R2018b, when I use the code, I get an error Undefined variable "FPGA3_Library" or class "FPGA3_Library.FPGABoardStates".

Could anyone give me some clue on this?

Thanks.

Answer 1

[Charles Chen]

I found a working solution from other source.

To access nested Enum, use below command: enumtest = FPL.AssemblyHandle.GetType('FPGA3_Library.InitiateBoard+FPGABoardStates');

Then use enumtest.GetEnumValues to get all enum values.

Answer 2

[David]

And perhaps add a slight bit of clarity, you definitely do need the round brackets and single quotes.

So continuing the original post example: if the valid enum FPGABoardStates are "On" or "Off" you can assign a matlab variable like so:

stateOn = FPGA3_Library.('InitiateBoard+FPGABoardStates').On;
stateOff = FPGA3_Library.('InitiateBoard+FPGABoardStates').Off;

then

whos stateOn

would let you confirm the type of this variable.

Then you could pass this variable (as an argument of the specific enum type) to a method/function of the class as appropriate.

Answer 3

[Telencephalon]

Just ran into this issue, too, and the accepted answer helped me solve it. To elaborate a bit more: When an assembly is added like this:

myAssemblyObject = NET.addAssembly('C:\path\to\myAssembly.dll');

then a handle to a nested enum (i.e., an enum that is a member of a class) can be accessed by using

myEnumHandle = myAssemblyObject.AssemblyHandle.GetType('My.Namespace.MyClass+MyNestedEnum');

Now, a list of the values of the enum can be accessed by

myEnumHandle.GetEnumValues()

and an individual value at index ix by

myEnumHandle.GetEnumValues().Get(ix)

All the handles (to the assembly, the enum, and the enum values) offer a wealth of additional properties and methods that can be explored by using tab completion in the Matlab command window.

[Raha]

This was very helpful thanks fso much