GetType()与Typeof()的区别 举了2个案例

GetType()与Typeof()区别

GetType(）返回的是对象的类名
案例1：

int i = 5;
Console.WriteLine(i.GetType());//System.Int32
var x = 127.25m;
Console.WriteLine(x.GetType());//System.Decimal

案例2：

namespace _2011._12._15
{
    class Program
    {
        static void Main(string[] args)
        {
            Test testone = new Test();
            string s = testone.GetType().ToString();
            Console.WriteLine(s);//_2011._12._15.Test  命名空间的Test类
        }
    }
    class Test
    {     
    }
}

Typeof()返回的是类名的对象，也可以返回类名，也可以返回特定类内部的方法和字段

namespace _2011._12._15
{
    class Program
    {
        static void Main(string[] args)
        {
            Test testone = new Test();
            string s = testone.GetType().ToString();
            Console.WriteLine("GetType():");
            Console.WriteLine(s);//_2011._12._15.Test  命名空间的Test类

            Type type = typeof(Test);
            Console.WriteLine("Typeof():");
            Console.WriteLine(type);//_2011._12._15.Test  命名空间的Test类
            Console.WriteLine();

           MethodInfo[] methodinfo = type.GetMethods();

           Console.WriteLine(methodinfo.GetType());//System.Reflection.MethodInfo[]
            foreach (var i in methodinfo)
            {
                Console.WriteLine(i);//输出Test类的所有方法及继承Object的实例方法
            }
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            Console.WriteLine();
            MemberInfo[] memberinfo = type.GetMembers();
            Console.WriteLine(memberinfo.GetType());
            foreach(var i in memberinfo)
            {
                Console.WriteLine(i);//输出Test类字段和System.type类型
            }
        }


    }

    class Test
    {

        private int age;
        public string name;
        public void speaking()
        {
            Console.WriteLine("Welcome to cnblog!");
        }


        public void writing()
        {
            Console.WriteLine("Please writing something!");
        }
    }
}

运行结果：

GetType():
_2011._12._15.Test
Typeof():
_2011._12._15.Test

System.Reflection.MethodInfo[]
Void speaking()
Void writing()
System.Type GetType()
System.String ToString()
Boolean Equals(System.Object)
Int32 GetHashCode()




System.Reflection.MemberInfo[]
Void speaking()
Void writing()
System.Type GetType()
System.String ToString()
Boolean Equals(System.Object)
Int32 GetHashCode()
Void .ctor()
System.String name