this关键字之一个有趣的用法

this关键字

1.首先一个用处就是代表当前类的对象。

2.当我们对构造函数进行重载的时候代码如下：

 public class Class1
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Grade { get; set; }
        public int English { get; set; }
        public int Math { get; set; }
        public int Chinese { get; set; }
        public Class1(string name,int age,string grade,int english,int math,int chinese)
        {
            this.Name = name;
            this.Age = age;
            this.Grade = grade;
            this.English = english;
            this.Math = math;
            this.Chinese = chinese;
        }
        public Class1(string name,int english, int math, int chinese)
        {
            this.Name = name;
            this.English = english;
            this.Math = math;
            this.Chinese = chinese;
        }
        public Class1(string name, int age)
        {
            this.Name = name;
            this.Age = age;
        }
        public Class1()
        {

        }
    }

以上代码完全没有问题，但是不免有些代码冗余的现象。我们可以使用this关键字

 public class Class1
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public string Grade { get; set; }
        public int English { get; set; }
        public int Math { get; set; }
        public int Chinese { get; set; }
        public Class1(string name,int age,string grade,int english,int math,int chinese)
        {
            this.Name = name;
            this.Age = age;
            this.Grade = grade;
            this.English = english;
            this.Math = math;
            this.Chinese = chinese;
        }
        public Class1(string name,int english, int math, int chinese):this(name,0,"c",english,math,chinese)
        {
            //this.Name = name;
            //this.English = english;
            //this.Math = math;
            //this.Chinese = chinese;
        }
        public Class1(string name, int age)
        {
            this.Name = name;
            this.Age = age;
        }
        public Class1()
        {

        }

    }

即this的第二个用处为在类中显式的调用本类的构造函数