探討:如何使用委託,匿名方法對集合進行萬能排序

下面Demo中我使用了2種排序方式
1.讓Employee繼承IComparable 介面，實現CompareTo方法排序
2.定義一個方法使用Comparison<T>委託，排序的操作交給匿名方法
看完下面的代碼，你知道使用Comparison<T>委託的好處嗎？
複製代碼 代碼如下: class Employee:IComparable
{
public string Name { get; set; }
public int Age { get; set; }
public static List<Employee> GetEmployees()
{
return new List<Employee>()
{
new Employee(){Name ="GuoHu",Age =25},
new Employee(){Name ="LeiHu",Age =23},
new Employee(){Name ="JunWenLi",Age =24},
new Employee(){Name ="JinHaoLiu",Age =25},
new Employee(){Name ="ChengFang",Age =24}
};
}
public int CompareTo(object obj)
{
Employee employee = obj as Employee;
if (employee != null)
{
return Name.CompareTo(employee.Name);
}
else
{
throw new ArgumentException("obj is not Employee");
}
}
}
class Test
{
static void SortAndShowFiles(string title, Comparison<Employee> employeeInfo)
{
List<Employee> employee = Employee.GetEmployees();
employee.Sort(employeeInfo);
Console.WriteLine(title);
foreach(Employee e in employee)
{
Console.WriteLine("Name:{0},Age:{1}", e.Name, e.Age);
}
}
static void Main()
{
List<Employee> employeeInfo = Employee.GetEmployees();
//Using IComparable sort
employeeInfo.Sort();
employeeInfo.ForEach(e => Console.WriteLine("Name:{0},Age{1}/t", e.Name, e.Age));
SortAndShowFiles("Sort by name", delegate(Employee e1, Employee e2) { return e1.Name.CompareTo(e2.Name); });
SortAndShowFiles("Sort by age", delegate(Employee e1, Employee e2) { return e1.Age.CompareTo(e2.Age); });
}

}