Timothy

類別

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace mod01
{
    public class Employee:System.IComparable<Employee>,IEquatable<Employee>
    {
        //Data Field
        private Int32 _id;

        public Int32 Id
        {
            get { return _id; }
            set { _id = value; }
        }
        private Decimal _salary;

        public Decimal Salary
        {
            get { return _salary; }
            set { _salary = value; }
        }
        private String _name;

        public String Name
        {
            get { return _name; }
            set { _name = value; }
        }
        public Employee() { }
        //解構子
        ~Employee()
        {
            //類別成員
            AppUtil.writeMsg(@"c:\mylog.txt","Employee解構了!!"+DateTime.Now.ToString());
        }

        #region IComparable<Employee> 成員

        public int CompareTo(Employee other)
        {
            Int32 r = 0; // 相等
            if (this.Id > other.Id)
            {
                r = 1;
            }
            if (this.Id < other.Id)
            {
                r = -1;
            }
            return r;
        }

        #endregion

        #region IEquatable<Employee> 成員

        public bool Equals(Employee other)
        {
            Boolean r = false;
            if((this.Id==other.Id) && (this.Name.Equals(other.Name)))
            {
                r=true;
            }
            return r;
        }

        #endregion
    }
}

主程式

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace mod01
{
    class TestEmployeeEquals
    {
        public static void Main()
        {
            Employee emp1 = new Employee() { Id = 1, Salary = 50000, Name = "eric" };
            Employee emp2 = new Employee() { Id = 1, Salary = 50000, Name = "eric" };
            //兩個物件內容比對
            if (emp1 == emp2) //比位址
            {
                System.Console.WriteLine("相同!!");
            }
            else
            {
                System.Console.WriteLine("不相同!!");
            }
            if (emp1 .Equals(emp2)) //比位址
            {
                System.Console.WriteLine("相同!!");
            }
            else
            {
                System.Console.WriteLine("不相同!!");
            }
        }
    }
}

輸出

不相同!!

相同!!