static void Main(string[] args)
{
string[] s = { "a", "A", "-1", "1a", "2B", "AB", "b", "B" };
//Array.Sort(s, (a, b) => string.Compare(a, b, StringComparison.OrdinalIgnoreCase)); //匿名函数lamb表达式
Array.Sort(s, new Comparison<string>(comp));
foreach (object a in s)
{
Console.WriteLine(a);
}
Console.Read();
}
public static int comp(string m, string n)
{
return string.Compare(m, n, StringComparison.OrdinalIgnoreCase);
}
例2、ArrayList排序
1>基础类
class Program
{
static void Main(string[] args)
{
ArrayList list = new ArrayList(new string[9] { "c", "a", "b", "B", "A", "C", "1", "2", "3" });
IComparer myComparer = new myClass();
list.Sort(myComparer);
foreach (object a in list)
{
Console.WriteLine(a);
}
Console.Read();
}
}
public class myClass : IComparer
{
int IComparer.Compare(Object x, Object y)
{
return Comparer.Default.Compare(x, y);
}
}
2>自定义类：非泛型集合类
i)
using System.Collections;
public class Person
{
private string name;
private int age;
public string Name
{
get { return name; }
set { name = value; }
}
public int Age
{
get { return age; }
set { age = value; }
}
public Person(string name, int age)
{
this.name = name;
this.age = age;
}
}
class Program
{
static void Main(string[] args)
{
//Person p1 = new Person("c", 3);
//Person p2 = new Person("b", 4);
//Person p3 = new Person("s", 5);
//ArrayList list = new ArrayList();
//list.Add(p1);
//list.Add(p2);
//list.Add(p3);
Person[] persons = new Person[3];
persons[0] = new Person("c", 10);
persons[1] = new Person("b", 4);
persons[2] = new Person("s", 5);
ArrayList lists = new ArrayList();
lists.AddRange(persons);
foreach (Person P in lists)
{
Console.WriteLine("{0},{1}", P.Name, P.Age);
}
IComparer myComparer = new myClass();
lists.Sort(myComparer);
foreach (Person P in lists)
{
Console.WriteLine("{0},{1}", P.Name, P.Age);
}
}
}
public class myClass : IComparer
{
int IComparer.Compare(Object x, Object y)
{
Person personX = (Person)x;
Person personY = (Person)y;
//if (personX.Age > personY.Age)
// return 1;
//if (personX.Age < personY.Age)
// return -1;
//else
// return 0;
return personX.Age.CompareTo(personY.Age); //按年龄比较
//return personX.Name.CompareTo(personY.Name); //按名字比较
}
}
ii)
public class CustomerInfo
{
private static ArrayList CustomerList = new ArrayList();
private string id;
private string name;
private string address;
public string ID
{
get { return id; }
set { id = value; }
}
public string Name
{
get { return name; }
set { name = value; }
}
public string Address
{
get { return address; }
set { address = value; }
}
public CustomerInfo()
{
}
public CustomerInfo(string id, string name, string address)
{
this.id = id;
this.name = name;
this.address = address;
}
public static void AddCustomer(CustomerInfo aCustomerInfo)
{
CustomerList.Add(aCustomerInfo);
}
public static void Delete(CustomerInfo oo)
{
int i = CustomerList.IndexOf(oo);
if (i < 0)
{
Console.WriteLine("no!");
}
else
{
CustomerList.RemoveAt(i);
}
}
public static void Show()
{
foreach (CustomerInfo s in CustomerList)
{
Console.WriteLine(s.ID + ", " + s.Name + ", " + s.Address);
}
}
public static void SortByName() //通过接口实现按照客户姓名排序的方法
{
CustomerList.Sort(new CustomerNameCompare()); //实现自定义排序的接口
}
public static void SortByID() //通过接口实现按照客户ID排序的方法
{
CustomerList.Sort(new CustomerIdCompare()); //实现自定义排序的接口
}
public static void DeleteByName(string name)
{
for (int i = 0; i < CustomerList.Count; i++)
{
CustomerInfo aCustomerInfo = (CustomerInfo)CustomerList[i];
if (aCustomerInfo.Name == name)
{
//CustomerInfo.Delete(aCustomerInfo);
CustomerList.RemoveAt(i);
break;
}
}
}
}
public class CustomerNameCompare : IComparer //按名字排序
{
public int Compare(object x, object y)
{
//CustomerInfo customerInfoX = (CustomerInfo)x;
//CustomerInfo customerInfoY = (CustomerInfo)y;
//return new CaseInsensitiveComparer().Compare(customerInfoX.Name, customerInfoY.Name);
return new CaseInsensitiveComparer().Compare(((CustomerInfo)x).Name, ((CustomerInfo)y).Name); //CaseInsensitiveComparer类：比较两个对象相等，忽略大小写的字符串。
}
}
public class CustomerIdCompare : IComparer //按ID排序
{
public int Compare(object x, object y)
{
return new CaseInsensitiveComparer().Compare(((CustomerInfo)x).ID, ((CustomerInfo)y).ID);
}
}
