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C# calls C++ dynamic link library dll

黄舟
黄舟Original
2017-02-27 11:28:102275browse

在过程中发现两种方法解决问题:一种是非托管C++创建的dll库,需要用静态方法调用。这种方法无法在C#的reference中直接引用,而是要用静态调用的方法,其他博客已经介绍的很详尽,唯一需要补充的是,C#文件需要先:

using System.Runtime.InteropServices;

之后才可以调用[DllImport]方法。

另一种方法是直接使用CLR,生成托管C++dll库。

创建流程

例程如下
C++ dll:

// CPPlibdemo.h
#pragma once

using namespace System;

namespace CPPlibdemo {

	public ref class Class1
	{
		// TODO: Add your methods for this class here.
	public:
			String ^getgreating(){

			return "hello world";
		}
	};
}

C#语言:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CPPlibdemo;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            Class1 clrdemo = new Class1();

            Console.Write(clrdemo.getgreating());
            Console.ReadLine();
        }
    }
}

           

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