c#反射调用方法示例

class MyClass
    {
        int x;
        int y;
        public MyClass(int i, int j)
        {
            this.x = i;
            this.y = j;
        }
        public int Sum()
        {
            return x + y;
        }
        public bool IsBetween(int i)
        {
            if (x < i && i < y)
            {
                return true;
            }
            return false;
        }
        public void Set(int a, int b)
        {
            x = a;
            y = b;
        }
        public void Set(double a, double b)
        {
            x = (int)a;
            y = (int)b;
        }
        public void Show()
        {
            Console.WriteLine("x: " + x + "  y:  " + y);
        }
    }

MyClass

Type t = typeof(MyClass);//获得一个表示MyClass类的Type对象
            Console.WriteLine("获取当前成员的名称" + t.Name);
            Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
            Console.WriteLine("支持的方法");
            #region 第一种形式
            //MethodInfo[] mi = t.GetMethods();//显示Class类中被支持的方法
            // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            //方法GetMethods() 把 MyClass 的基类 object方法都显示出来了
            //下面我们说说  GetMethods() 的另外一种形式，有限制的显示
            #endregion
            #region 第二种形式
            MethodInfo[] mi = t.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public);
            #endregion
            foreach (MethodInfo m in mi)
            {
                //返回后打印出MyClass类中成员的类型(方法的返回值类型)极其方法名称
                Console.Write("  " + m.ReturnType.Name + "  " + m.Name + " (");//ReturnType获取此方法的返回类型
                ParameterInfo[] pi = m.GetParameters();//获得方法的参数
                for (int i = 0; i < pi.Length; i++)
                {
                    Console.Write(pi[i].ParameterType.Name + "   " + pi[i].Name);//ParameterType 获取该参数的Type（类型）
                    if (i+1<pi.Length)
                    {
                        Console.Write(", ");
                    }

                }
                Console.WriteLine(")");
                Console.WriteLine();
            }       

            Console.ReadKey();

public void Set(int a, int b)
        {
Console.WriteLine("Set(int,int)");
x = a;
y = b;
Show();
        }
        public void Set(double a, double b)
        {
Console.WriteLine("Set(double,double)");
x = (int)a;
y = (int)b;
Show();
        }

Type t = typeof(MyClass);
MyClass reflectOb = new MyClass(10, 20);
int val;
Console.WriteLine("Invoke methods in " + t.Name);//调用MyClass类的方法
Console.WriteLine();
MethodInfo[] mi = t.GetMethods();

foreach (MethodInfo m in mi)//调用每个方法
{
    //获得方法参数
    ParameterInfo[] pi = m.GetParameters();
    if (m.Name.Equals("Set",StringComparison.Ordinal)&&pi[0].ParameterType==typeof(int))
    {
        //     指定 System.String.Compare(System.String,System.String) 和 System.String.Equals(System.Object)
        //     方法的某些重载要使用的区域、大小写和排序规则。
        //StringComparison.Ordinal   使用序号排序规则比较字符串
        object[] obj = new object[2];
        obj[0] = 9;
        obj[1] = 18;
        m.Invoke(reflectOb, obj);
    }
    else if (m.Name.Equals("Set",StringComparison.Ordinal)&&pi[0].ParameterType==typeof(double))
    {
        object[] obj = new object[2];
        obj[0] = 1.12;
        obj[1] = 23.4;
        m.Invoke(reflectOb, obj);
    }
    else if (m.Name.Equals("Sum",StringComparison.Ordinal))
    {
        val = (int)m.Invoke(reflectOb, null);
        Console.WriteLine("Sum is : " + val);
    }
    else if (m.Name.Equals("IsBetween", StringComparison.Ordinal))
    {
        object[] obj = new object[1];
        obj[0] = 14;
        if ((bool)m.Invoke(reflectOb, obj))
        {
Console.WriteLine("14 is between x and y");
        }
    }
    else if (m.Name.Equals("Show",StringComparison.Ordinal))
    {
        m.Invoke(reflectOb,null);
    }
}

Main