从C#应用程序内部调用Matlab编译器会引发异常 [英] Calling Matlab Compiler from inside C# app throws exception

问题描述

我找到了这段代码来调用Matlab编译器，当从Matlab命令提示符处调用该函数时，它可以正常工作，我将此函数构建为.Net Assembly，但是每当我尝试在我的C#应用​​程序中使用它以构建一些代码时， .m文件我例外，您认为我的问题在哪里?

I found this code to invoke the Matlab compiler, it works fine when the function is called from Matlab command prompt, I build this function to .Net Assembly but whenever I try to use it in my C# app in order to build some .m file I get an exception, where do you think my problem is?

Matlab代码:

function compileCode(mfile,dllName , dnetdir)

    %% Create directories if needed
    if (exist(dnetdir, 'dir') ~= 7)
        mkdir(dnetdir);
    end

    %% Build .NET Assembly
    eval(['mcc -N -d ''' dnetdir ''' -W ''dotnet:' dllName ',' ...
          '' dllName ',0.0,private'' -T link:lib ''' mfile '''']);
    end

C#代码:

var cmm = new compiler.MatlabCompiler();
MWCharArray x = new MWCharArray(@"C:\Users\ePezhman\Documents\MATLAB\Graph2D.m");
MWCharArray y = new MWCharArray("Graph");
MWCharArray z = new MWCharArray(@"C:\Matlab\dotnet");
cmm.compileCode(x,y,z);

例外:

... MWMCR :: EvaluateFunction错误...的未定义函数'mcc' 类型为"char"的输入参数.第9行=> compileCode.m错误.

... MWMCR::EvaluateFunction error ... Undefined function 'mcc' for input arguments of type 'char'. Error in => compileCode.m at line 9.

... Matlab M代码堆栈跟踪... 在文件C:\ Users \ ePezhman \ AppData \ Local \ Temp \ ePezhman \ mcrCache8.0 \ compil0 \ compiler \ compileCode.m中， 名称compileCode，第9行.

... Matlab M-code Stack Trace ... at file C:\Users\ePezhman\AppData\Local\Temp\ePezhman\mcrCache8.0\compil0\compiler\compileCode.m, name compileCode, line 9.

推荐答案

有趣的是，我假设您正在尝试编译一个可以动态编译其他函数的函数.

Interesting, I assume you are trying to compile a function that can dynamically compile other functions..

不幸的是，我不认为mcc函数本身可以编译/部署

Unfortunately, I dont think the mcc function can be compiled/deployed itself

确切地说，您看到的问题是因为MATLAB需要知道在编译时调用的所有函数，并且通过使用eval，它不会自行解决(因为它不会在字符串内部进行解析) .您可以通过为编译器编写特殊注释来解决此特定问题. /p>

To be exact, the problem you are seeing is because MATLAB needs to know all functions called at compile-time, and by using eval, it wont figure it out on its own (since it wont parse inside the string). You can fix this particular issue by writing special comments for the compiler..

function myEval()
    %#function foo
    eval('...');
end

(另一种替代方法是使用功能句柄).

(Another alternative is using function handles).

即使执行此操作，它也会在运行时在mcc函数内部失败，提示:"License checkout failed, [...] Cannot find a valid license for Compiler".

Still even if you do that, it will fail at runtime inside the mcc function saying that: "License checkout failed, [...] Cannot find a valid license for Compiler".

原因如注释中所述，mcc是开发工具，不能部署到仅依赖于免费MCR运行时的独立程序中.

The reason is as mentioned in the comments, mcc is a development tool and cannot be deployed to standalone programs which only depends on the free MCR runtime.

考虑一下，如果可能的话，它将破坏购买产品许可证的全部目的，因为您可以创建一个独立的程序，该程序可以在没有编译器工具箱的情况下编译其他代码:)

Think about it, if it was possible, it would defeat the whole purpose of buying licenses for the product, as you could create a standalone program that can compiler other codes without having the Compiler toolbox :)

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