C#中练习属性使用的一个例子

属性有四个种类：可读属性（需实现get和set访问器）、只读属性（实现get访问器）、只写属性（实现set访问器）和Static属性（只能访问静态数据）参考下面这个例子：

 

//这个例子是在vs2008中实现的

 

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

namespace shuxing

{

    class program

    {

        static void Main()

        {

            User zs = new User();

            User ls = new User();

            zs.Name = "张三";

            zs.Sex = "女";

            zs.Birthday = Convert.ToDateTime("1980-1-1");

            Console.WriteLine(User.LoginCount);

            Console.WriteLine("姓名：" + zs.Name + "   性别：" + zs.Sex+ "  年龄："+zs.Age);

        }

    }

    class User

    {

        private string m_Name;

        private string m_Sex;

        private DateTime m_Birthday;

        private static int m_LoginCount;

        public User()

        {

            m_LoginCount++;

        }

        public static int LoginCount    //静态只读属性

        {

            get

            {

                return m_LoginCount;

            }

        }

        public DateTime Birthday       //只写属性

        {

            set

            {

                if (value < Convert.ToDateTime("1900-1-1") || value.Year > DateTime.Now.Year - 3)

                    Console.WriteLine("用户年龄非法");

                else

                {

                    m_Birthday = value;

                }

            }

        }

        public int Age          //只读属性

        {

            get

            {

                return DateTime.Now.Year - m_Birthday.Year;

            }

        }

        public string Name      //读写属性

        {

            get

            {

                return m_Name;

            }

            set

            {

                m_Name = value;

            }

        }

        public string Sex     //读写属性

        {

            get

            {

                return m_Sex;

            }

            set

            {

                if (value == "男" || value == "女")

                {

                    m_Sex = value;

                }

                else

                {

                    Console.WriteLine("性别只能为“男”或“女”");

                }

            }

        }

     }

}

 

 

 

注：上面这个例子使用了属性，使代码更加清晰还逻辑严密。