从C ++ / CLI调用C＃DLL函数 [英] Call C# dll function from C++/CLI

问题描述

我有C＃DLL。贝娄是代码

I have C# dll. Bellow is code

public class Calculate
{
    public static  int GetResult(int arg1, int arg2)
    {
        return arg1 + arg2;
    }

    public static  string GetResult(string arg1, string arg2)
    {
        return arg1 + " " + arg2;
    }

    public static   float GetResult(float arg1, float arg2)
    {
        return arg1 + arg2;
    }

    public Calculate()
    {
    }
}

现在，我计划从调用C ++这个DLL在这条路上。

Now, I am planning to call this dll from C++ on this way.

[DllImport("CalculationC.dll",EntryPoint="Calculate", CallingConvention=CallingConvention::ThisCall)]
extern void Calculate();

[DllImport("CalculationC.dll",EntryPoint="GetResult", CallingConvention=CallingConvention::ThisCall)]
extern int GetResult(int arg1, int arg2);

下面是函数，其中被称为调用getResult

Here is function where is called GetResult

private: System::Void CalculateResult(int arg1, int arg2)
{
    int rez=0;

    //Call C++ function from dll
    Calculate calculate=new Calculate();
    rez=GetResult(arg1,arg2);
}

我得到了错误：语法错误：标识符'计算'。
谁能帮我这个可怕的错误？

I got the error : "syntax error : identifier 'Calculate'". Can someone help me with this terrible error?

推荐答案

您必须使用C ++ CLI，否则你不能打电话的DllImport。
。如果这是你可以参考C＃DLL的情况下

You must be using c++ CLI, otherwise you could not call DllImport. If that is the case you can just reference the c# dll.

在C ++ CLI中，您可以做如下：

In c++ CLI you can just do as follows:

using namespace Your::Namespace::Here;

#using <YourDll.dll>

YourManagedClass^ pInstance = gcnew YourManagedClass();

其中YourManagedClass'与输出单元YourDll.dll的C＃项目定义。

where 'YourManagedClass' is defined in the c# project with output assembly 'YourDll.dll'.

**编辑**
增加了你的榜样。

** EDIT ** Added your example.

这是你的榜样，需要怎样的样子在CLI（为清楚起见，我假设使得G
etResult不是一个静态的功能，否则，你只会调用计算::调用getResult（...）

This is how your example needs to look like in CLI (for clarity I am assuming that G etResult is not a static function, otherwise you would just call Calculate::GetResult(...)

private: System::Void CalculateResult(int arg1, int arg2)
{
    int rez=0;
    //Call C++ function from dll
    Calculate^ calculate= gcnew Calculate();
    rez=calculate->GetResult(arg1,arg2);   
}

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