原创 Visual 2005 C# 中 DLL 创建/调用

刚开始学习C#,需要用到DLL，看网上资料，借用前辈的例子，自己搞了搞：

 C#中生成DLL

1.选择New Project中的C#, Class Library, 命名MyDll

2.打开Class1.cs, 在namespace MyDll中添加public class CSwap; public class CMaxCD.

3.在CSwap中添加public static bool Swap(ref long i, ref long j)；

   在CMaxCD中添加public static long MaxCD(long i, long j)；

4.存盘, Build MyDll.

C#中调用DLL

1.选择New Project ->C#->Console Application,命名MyDllApp

2.在Program.cs中添加using MyDll.  在project中选择add references,选择MyDll.dll。

3.在main()中就可以调用Dll中的函数了。

Class1.cs代码

using System;
using System.Collections.Generic;
using System.Text;

namespace MyDll
{
    public class CSwap
    {
        public static bool Swap(ref long i, ref long j)
        {
            //
            // TODO: Add constructor logic here
            //
            i = i + j;
            j = i - j;
            i = i - j;
            return true;
        }
    }
    public class CMaxCD
    {
        public static long MaxCD(long i, long j)
        {
            //
            // TODO: Add constructor logic here
            //
            long a, b, temp;
            if (i > j)
            {
                a = i;
                b = j;
            }
            else
            {
                b = i;
                a = j;
            }
            temp = a % b;
            while (temp != 0)
            {
                a = b;
                b = temp;
                temp = a % b;
            }
            return b;
        }
    }
}

Program.cs代码

using System;
using System.Collections.Generic;
using System.Text;
using MyDll;
namespace MyDllApp
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length != 2)
            {
                Console.WriteLine("Usage: MyClient<Num1><Num2>");
                return;
            }
            long num1 = long.Parse(args[0]);
            long num2 = long.Parse(args[1]);
            CSwap.Swap(ref num1, ref num2);

            Console.WriteLine("The result of Swap is num1= {0} and num2= {1}", num1, num2);
            long maxcd = CMaxCD.MaxCD(num1, num2);
            Console.WriteLine("The MaxCD of {0} and {1} is {2}", num1, num2, maxcd);
            Console.ReadKey();
        }
    }
}