1、List.Sort (泛型 Comparison) 法
此方法的参数是Comparison类型,其实是一个包含两个参数的委托,因此使用此方法,我们只需要定义一个委托,其两个参数均为Student类型,在委托实现的方法比较两个Student对象的Age属性即可。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GenericCompare
{
class Program
{
static void Main(string[] args)
{
List<Student> students = new List<Student>();
students.Add(new Student("001","kenshincui",25));
students.Add(new Student("002", "miaoer", 23));
students.Add(new Student("003", "shenjinjuan", 22));
students.Add(new Student("004", "nieyanxin", 24));
Console.WriteLine("未进行排序之前:");
foreach (Student st in students)
{
Console.WriteLine(st.No+","+st.Name+","+st.Age+";");
}
Console.WriteLine("List.Sort (泛型 Comparison) 排序之后:");
students.Sort(delegate(Student a, Student b) { return a.Age.CompareTo(b.Age); });
foreach (Student st in students)
{
Console.WriteLine(st.No + "," + st.Name + "," + st.Age + ";");
}
Console.ReadKey();
}
}
}
2、List.Sort (泛型 IComparer)
此方法需要一个泛型IComparer接口类型,因此只要定义一个类实现此接口然后再调用此方法即可。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GenericCompare
{
class StudentCompare :IComparer<Student>
{
public int Compare(Student a, Student b)
{
return a.Age.CompareTo(b.Age);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace GenericCompare
{
class Program
{
static void Main(string[] args)
{
List<Student> students = new List<Student>();
students.Add(new Student("001","kenshincui",25));
students.Add(new Student("002", "miaoer", 23));
students.Add(new Student("003", "shenjinjuan", 22));
students.Add(new Student("004", "nieyanxin", 24));
Console.WriteLine("未进行排序之前:");
foreach (Student st in students)
{
Console.WriteLine(st.No+","+st.Name+","+st.Age+";");
}
Console.WriteLine("List.Sort (泛型 IComparer) 排序之后:");
students.Sort(new StudentCompare());
foreach (Student st in students)
{
Console.WriteLine(st.No + "," + st.Name + "," + st.Age + ";");
}
Console.ReadKey();
}
}
}
参考资料: c#中list排序 http://www.studyofnet.com/news/531.html
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