How to call .dll without header file

DLL is generated from C# code. So there's no header file. I want to call this dll from matlab.

Loadlibrary requiries .h file which is not available in my case. What is the best way to run the dll from matlab.?

Answer 1

[Walter Roberson]

The header files is necessary for identifying function "signatures" -- knowing what datatype each function parameter is.

So the answer is "You don't call a C# dll without a header file. Write the header file yourself if need be.

The main alternative is to create the C# as a .NET assembly and use https://www.mathworks.com/help/matlab/ref/net.addassembly.html

[Kiruthika]

Hi Walter,

Thanks for replying. I used addassembly. It loads the all the structures, classes, etc. How do I call the methods from the dll.?

I'm not very clear on how to instantiate the class and use it. Attached the screenshot of the workspace after running addassembly and the c# code.

I'm trying to connect to http link. Any leads will be appreciated.

Thanks.

Answer 2

[TED MOSBY]

Hi Kiruthika,

Loadlibrary is only for native (un‑managed) DLLs. A DLL that comes from C# is managed code—a .NET assembly—so you should use MATLAB’s built‑in .NET interface instead of loadlibrary.

dllPath = fullfile('C:\path\to','MyDotNetLib.dll');  
asmInfo = NET.addAssembly(dllPath);

Here's a link to the above MATLAB function: https://www.mathworks.com/help/matlab/ref/net.addassembly.html

Hope ths helps!