关于C#基础知识回顾--反射(三)

class MyClass
{
    int x;
    int y;
    public MyClass(int i)
    {
        Console.WriteLine("一个参数的构造函数：");
        x = y = i;
    }
    public MyClass(int i, int j)
    {
        Console.WriteLine("两个参数构造函数：");
        x = i;
        y = j;
        Show();
    }
    public int Sum()
    {
        return x + y;
    }
    public bool IsBetween(int i)
    {
        if (x < i && i < y)
            return true;
        else
            return false;
    }
    public void Set(int a, int b)
    {
        Console.Write("函数：Set(int a, int b)");
        x = a;
        y = b;
        Show();
    }
    public void Set(double a, double b)
    {
        Console.Write("函数：Set(double a, double b)");
        x = (int)a;
        y = (int)b;
        Show();
    }
    public void Show()
    {
        Console.WriteLine("x:{0},y:{1}", x, y);
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
namespace Reflection
{
    class Program
    {
        static void Main(string[] args)
        {
            InvokeConsDemo();
            Console.ReadKey();
        }

        static void InvokeConsDemo()
        {
            Type t = typeof(MyClass);
            int val;
            ConstructorInfo[] ci = t.GetConstructors();
            Console.WriteLine("类构造函数如下：");
            foreach (ConstructorInfo c in ci)
            {
                Console.Write("" + t.Name + "(");
                ParameterInfo[] pi = c.GetParameters();
                for (int i = 0; i < pi.Length; i++)
                {
                    Console.Write(pi[i].ParameterType.Name + " " + pi[i].Name);
                    if (i + 1 < pi.Length) Console.Write(", ");
                }
                Console.WriteLine(") ");
            }
            Console.WriteLine();
            int x;
            for (x = 0; x < ci.Length; x++)
            {
                ParameterInfo[] pi = ci[x].GetParameters();
                if (pi.Length == 2) break;
            }
            if (x == ci.Length)
            {
                Console.WriteLine("没有找到两个参数的构造函数"); return;
            }
            else
            {
                object[] consargs = new object[2];
                consargs[0] = 10;
                consargs[1] = 20;
                object reflectOb = ci[x].Invoke(consargs);
                Console.WriteLine("用reflectOb调用方法");
                Console.WriteLine();
                MethodInfo[] mi = t.GetMethods();
                foreach (MethodInfo m in mi)
                {
                    ParameterInfo[] pi = m.GetParameters();
                    if (m.Name.CompareTo("Set") == 0 && pi[0].ParameterType == typeof(int))
                    {
                        object[] args = new object[2];
                        args[0] = 12;
                        args[1] = 7;
                        m.Invoke(reflectOb, args);
                    }
                    else if (m.Name.CompareTo("Set") == 0 && pi[0].ParameterType == typeof(double))
                    {
                        object[] args = new object[2];
                        args[0] = 1.25;
                        args[1] = 7.5;
                        m.Invoke(reflectOb, args);
                    }
                    else if (m.Name.CompareTo("Sum") == 0)
                    {
                        val = (int)m.Invoke(reflectOb, null);
                        Console.WriteLine("Sum is {0}",val);
                    }
                    else if (m.Name.CompareTo("IsBetween") == 0)
                    {
                        object[] args = new object[1];
                        args[0] = 13;
                        if ((bool)m.Invoke(reflectOb, args))
                        {
                            Console.WriteLine("13 is between x and y");
                        }
                    }
                    else if (m.Name.CompareTo("Show") == 0)
                    {
                        m.Invoke(reflectOb, null);
                    }
                }
            }
        }
    }
}