C#反射

首先我们建立一个类库,将它生成为HelloWorld.dll,

using System;

 namespace Webtest
 {

    public interface interface1
     {
          int add();
     
     }
     public class ReflectTest:interface1
     {
         
         public String Write;
         private String Writec;

         public String Writea
         {
             get
             {
                 return Write;
             }
             set
             {
                 Write = value;
             }
         
         }

         private String Writeb
         {
             get
             {
                 return Writec;
             }
             set
             {
                 Writec = value;
             }

         }

          public ReflectTest()
          {
              this.Write = "Write";
              this.Writec = "Writec";
          }

         public ReflectTest(string str1,string str2)
         {
             this.Write = str1;
             this.Writec = str2;
         }

         public string WriteString(string s,int b)
         {
             return "欢迎您，" + s + "---" + b; ;
         }

          public static string WriteName(string s)
          {
             return "欢迎您光临，" + s;
          }

         public string WriteNoPara()
         {
            return "您使用的是无参数方法";
         }

         private string WritePrivate()
         {
             return "私有类型的方法";
         }


         public int add()
         {
             return 5;
         }
     }
}

 然后,建立再建立一个项目引入该HelloWorld.dll,

using System;

using System.Threading;
using System.Reflection;


class Test
{
    delegate string TestDelegate(string value,int value1);

   static void Main()
    {
        //Assembly t = Assembly.LoadFrom("HelloWorld.dll"); 与下面相同的效果
        Assembly t = Assembly.Load("HelloWorld");

//**********************************************************************     
       foreach (Type aaa in t.GetTypes())
       {
            //Console.Write(aaa.Name);   //显示该dll下所有的类
        }

//**********************************************************************
        Module[] modules = t.GetModules();

        foreach (Module module in modules)
        {
            //Console.WriteLine("module name:" + module.Name);//显示模块的名字本例为"HelloWorld.dll"
        }

//**********************************************************************
        Type a = typeof(Webtest.ReflectTest);//得到具体的类的类型,和下面一个效果
        //Type a = t.GetType("Webtest.ReflectTest");//
        //Console.Write(a.Name);

//**********************************************************************
        string[] bb ={ "aaaa", "bbbbb" };
        object obj = Activator.CreateInstance(a,bb); //创建该类的实例,后面的bb为有参构造函数的参数
        //object obj = t.CreateInstance("Webtest.ReflectTest");//与上面方法相同

//**********************************************************************        
        MethodInfo[] miArr = a.GetMethods();
        foreach (MethodInfo mi0 in miArr)
       {
            //Console.Write(mi0.Name);  //显示所有的共有方法
       }

//**********************************************************************
        MethodInfo mi = a.GetMethod("WriteString");//显示具体的方法
        object[] aa={"使用的是带有参数的非静态方法",2};
        string s = (string)mi.Invoke(obj,aa); //带参数方法的调用

        MethodInfo mi1 = a.GetMethod("WriteName");
        String[] aa1 ={"使用的是静态方法"};
        string s1 = (string)mi1.Invoke(null, aa1); //静态方法的调用

        MethodInfo mi2 = a.GetMethod("WriteNoPara");
        string s2 = (string)mi2.Invoke(obj, null); //不带参数的方法调用

        MethodInfo mi3 = a.GetMethod("WritePrivate",BindingFlags.Instance | BindingFlags.NonPublic);
        string s3 = (string)mi3.Invoke(obj, null); //私有类型方法调用

        //Console.Write(s3);

//**********************************************************************
        PropertyInfo[] piArr = a.GetProperties(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
        foreach (PropertyInfo pi in piArr)
        {
         //Console.Write(pi.Name);  //显示所有的属性
        }

//**********************************************************************
        PropertyInfo pi1=a.GetProperty("Writea");
        //pi1.SetValue(obj, "Writea", null);
        //Console.Write(pi1.GetValue(obj,null));

        PropertyInfo pi2 = a.GetProperty("Writeb", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
        pi2.SetValue(obj, "Writeb", null);
        //Console.Write(pi2.GetValue(obj, null));

        FieldInfo fi1 = a.GetField("Write");
        //Console.Write(fi1.GetValue(obj));

//**********************************************************************
        ConstructorInfo[] ci1 = a.GetConstructors();
        foreach (ConstructorInfo ci in ci1)
        {
            //Console.Write(ci.ToString()); //获得构造函数的形式
        }

        ConstructorInfo asCI = a.GetConstructor(new Type[] { typeof(string), typeof(string) });
        //Console.Write(asCI.ToString());

//**********************************************************************
        Webtest.interface1 obj1 = (Webtest.interface1)t.CreateInstance("Webtest.ReflectTest");
        Webtest.ReflectTest obj2 = (Webtest.ReflectTest)t.CreateInstance("Webtest.ReflectTest");
        //Console.Write(obj1.add());典型的工厂模式

//**********************************************************************
        foreach (Type tt in t.GetTypes())
        {
            if (tt.GetInterface("interface1")!=null)
            {
                Webtest.interface1 obj3 = (Webtest.interface1)Activator.CreateInstance(a);
                //Console.Write(obj3.add());
            }
        }

//**********************************************************************
        TestDelegate method = (TestDelegate)Delegate.CreateDelegate(typeof(TestDelegate), obj, "WriteString");
       //动态创建委托的简单例子
        //Console.Write(method("str1", 2));

//**********************************************************************
        ConstructorInfo asCI1 = a.GetConstructor(new Type[0]);
        Webtest.ReflectTest obj5 = (Webtest.ReflectTest)asCI1.Invoke(null);
            //通过无参构造函数实例化的方法
        //Console.Write(obj5.Writea);

        ConstructorInfo asCI2 = a.GetConstructor(new Type[] { typeof(string), typeof(string) });
          //通过有参构造函数实例化的方法
        Webtest.ReflectTest obj6 = (Webtest.ReflectTest)asCI2.Invoke(bb);
        Console.Write(obj6.Writea);
//**********************************************************************

        Console.Read();
    }   
}