using System;
using ;
using ;
using ;
namespace hgoApp
{
class Comparer
{
static void Main()
{
Employee[] Employees = new Employee[5];
Employees[0] = new Employee("Zhang San", 2800);
Employees[1] = new Employee("Li Si", 1800);
Employees[2] = new Employee("Wang Wu", 5800);
Employees[3] = new Employee("Maliu", 12800);
Employees[4] = new Employee("Qian Qi", 8800);
("Sort by name");
(Employees);
foreach (Employee em in Employees)
{
(em);
}
("Sorted by salary");
(Employees, );
foreach (Employee em in Employees)
{
(em);
}
}
}
class Employee : IComparable
{
private string _Name;
public string Name
{
get { return _Name; }
}
private int _Salary;
public int Salary
{
get { return _Salary; }
}
public Employee(string Name, int Salary)
{
_Name = Name;
_Salary = Salary;
}
//Display interface implementation
int (object obj)
{
if (!(obj is Employee))
{
throw new ArgumentException("not Employee class");
}
return _Name.CompareTo(((Employee)obj)._Name);
}
//Providing a common strongly typed overloaded version
public int CompareTo(Employee Em)
{
return _Name.CompareTo(Em._Name);
}
//When the Employee is instantiated for the first time, _SalaryCom is empty. When using SalaryCom, a SalaryCompare object will be created. The second or third times, you can use _SalaryCom directly.
private static SalaryCompare _SalaryCom = null;
public static IComparer SalaryCom
{
get
{
if (_SalaryCom == null)
{
_SalaryCom = new SalaryCompare();
}
return _SalaryCom;
}
}
//Nested class (this class is a class that sorts for salary)
private class SalaryCompare:IComparer
{
//Sort elements in Array using the specified IComparer
int (object obj1,object obj2)
{
if (!(obj1 is Employee) || !(obj2 is Employee))
{
throw new ArgumentException("not Employee class");
}
return ((Employee)obj1)._Salary.CompareTo(((Employee)obj2)._Salary);
}
}
public override string ToString()
{
return _Name +" "+ _Salary.ToString();
}
}
}