How to invoke a .NET-method which expects a .NET-struct as parameter?

Hello,

is this possible at all in Matlab? I have a .NET assembly with a method that expects a .NET struct as parameter. I can't figure out how to create an appropriate struct for the method. I always get the error

"No method 'TestNETNameSpace.TestNETClass.passStructToMe' with matching signature found."

with this Matlab code or my other attempts:

asmbl = NET.addAssembly('C:\Test\testNETAssembly.dll');
import TestNETNameSpace.*
result1 = TestNETClass.passIntToMe(42); % This works fine.

% Question: How to make this right?
Matlabstruct.stringInStruct = "hello";
Matlabstruct.doubleInStruct = 12.5;
result2 = TestNETClass.passStructToMe(Matlabstruct); % This throws an error. 

This is the C# -code of my assembly testNETAssembly.dll.

namespace TestNETNameSpace
{
    public static class TestNETClass
    {
        public struct TestNETStruct
        {
            public string stringInStruct;
            public double doubleInStruct;
        }
    
        public static string passStructToMe(TestNETStruct str)
        {
            return str.stringInStruct;
        } 
        
        public static int passIntToMe(int i)
        {
            return i; 
        }
    }
}

Answer 1

[Mohammad Sami]

You can follow the type converstion between Matlab and .NET here

https://www.mathworks.com/help/matlab/matlab_external/handle-matlab-data-in-net-applications.html

In particular your .NET function would need to accept the following type of variable.

MathWorks.MATLAB.Types.MATLABStruct

MathWorks.MATLAB.Types.MATLABStruct[]

MathWorks.MATLAB.Types.MATLABStruct[,,...]

If you are trying to use a third parties code, I assume you will then have to write your own wrapper functions in .NET which covert your matlab data into the type required for your third party library to work.