C#：通过类名和方法名调用方法

1.我们先定义三个方法

using System;

namespace Testrun
{
    public class Testclass
    {
        public void PrintTxt()
        {
            Console.WriteLine("void&noparameter");
        }
        public void PrintTxt(int value1)
        {
            Console.WriteLine("void&1parameter:" + value1);
        }
        public string PrintTxt(int value1, int value2)
        {
            var resStr = "string&2parameter: " + value1 + ", " + value2;
            //Console.WriteLine(resStr);
            return resStr;
        }
    }
}

2.调用的方式：

using System;
using System.Reflection;

namespace Testrun
{
    class Program
    {
        static void Main(string[] args)
        {
            string strClass = "Testrun" + "." + "Testclass";
            const string strMethod = "PrintTxt";
            Type type = Type.GetType(strClass);
            if (type != null)
            {
                Object obj = Activator.CreateInstance(type);
                MethodInfo method = type.GetMethod(strMethod, new Type[] { });
                object[] parameters = null;
                method.Invoke(obj, parameters);

                method = type.GetMethod(strMethod, new Type[] { typeof(int) });
                parameters = new Object[] { 18 };
                method.Invoke(obj, parameters);

                method = type.GetMethod(strMethod, new Type[] { typeof(int), typeof(int) });
                parameters = new Object[] { 18, 2 };
                var res = (string)method.Invoke(obj, parameters);
                Console.WriteLine(res);

            }
        }
    }
}

3.运行结果