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HomeBackend DevelopmentC#.Net Tutorialc# Dynamically load the dll file and implement the analysis of calling the methods in it (recommended)

下面小编就为大家带来一篇c# 动态加载dll文件,并实现调用其中的方法(推荐)。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧

以下是测试代码:

新建一个classlibrary,包含两个类class1和class2,这两个类中分别有一个方法,都是返回一个字符串,代码如下:

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

namespace mydll
{
  public class Class1
  {
    public Class1()
    {

    }
    public string sayhello()
    {
      return "hello,word!";
    }
  }

  public class Class2
  {
    public Class2()
    {

    }

    public string saybeautiful()
    {
      return "beautiful,very good!";
    }
  }

}

在编译完成后会生成一个mydll.dll动态链接库,然后新建一个winform项目(其他也可以,调试用):

private void button1_Click(object sender, EventArgs e)
    {
      string path = @"D:\123\mydll\mydll\bin\Debug\mydll.dll";


      //Byte[] byte1 = System.IO.File.ReadAllBytes(path);//也是可以的
      //Assembly assem = Assembly.Load(byte1);

      Assembly assem = Assembly.LoadFile(path);


      //string t_class = "mydll.Class1";//理论上已经加载了dll文件,可以通过命名空间加上类名获取类的类型,这里应该修改为如下:

      //string t_class = "mydll.Class1,mydll";//如果你想要得到的是被本工程内部的类,可以“命名空间.父类……类名”;如果是外部的,需要在后面加上“,链接库名”;

      //再次感谢thy38的帮助。

      //Type ty = Type.GetType(t_class);//这儿在调试的时候ty=null,一直不理解,望有高人可以解惑

      Type[] tys = assem.GetTypes();//只好得到所有的类型名,然后遍历,通过类型名字来区别了
      foreach (Type ty in tys)//huoquleiming
      {
        if (ty.Name == "Class1")
        {
          ConstructorInfo magicConstructor = ty.GetConstructor(Type.EmptyTypes);//获取不带参数的构造函数
          object magicClassObject = magicConstructor.Invoke(new object[] { });//这里是获取一个类似于类的实例的东东

          //object magicClassObject = Activator.CreateInstance(t);//获取无参数的构造实例还可以通过这样
          MethodInfo mi = ty.GetMethod("sayhello");
          object aa=mi.Invoke(magicClassObject, null);
          MessageBox.Show(aa.ToString());//这儿是执行类class1的sayhello方法
        }
        if (ty.Name == "Class2")
        {
          ConstructorInfo magicConstructor = ty.GetConstructor(Type.EmptyTypes);
          //获取不带参数的构造函数,如果有构造函数且没有不带参数的构造函数时,这儿就不能这样子啦
          object magicClassObject = magicConstructor.Invoke(new object[] { });
          MethodInfo mi = ty.GetMethod("saybeautiful");
          object aa = mi.Invoke(magicClassObject, null);//方法有参数时,需要把null替换为参数的集合
          MessageBox.Show(aa.ToString());
        } 
      }

      //AppDomain pluginDomain = (pluginInstanceContainer[key] as PluginEntity).PluginDomain;
      //if (pluginDomain != null)
      //{
      //  AppDomain.Unload(pluginDomain);
      // } 

    }

 以上就是c# 动态加载dll文件,并实现调用其中的方法(推荐)分析的内容,更多相关内容请关注PHP中文网(www.php.cn)!


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