C#中Arraylist的sort函数用法实例分析

本文实例讲述了C#中Arraylist的sort函数用法。分享给大家供大家参考。具体如下：

ArrayList的sort函数有几种比较常用的重载：

1.不带参数

2.带一个参数

public virtual void Sort(
 IComparer comparer
)

参数

comparer

类型：System.Collections.IComparer

比较元素时要使用的 IComparer 实现。

- 或 -

null 引用（Visual Basic 中为 Nothing）将使用每个元数的 IComparable 实现。

示例:

using System;
using System.Collections;
public class SamplesArrayList {
 public class myReverserClass : IComparer {
  // Calls CaseInsensitiveComparer.Compare with the parameters reversed.
  int IComparer.Compare( Object x, Object y ) {
    return( (new CaseInsensitiveComparer()).Compare( y, x ) );
  }
 }
 public static void Main() {
  // Creates and initializes a new ArrayList.
  ArrayList myAL = new ArrayList();
  myAL.Add( "The" );
  myAL.Add( "quick" );
  myAL.Add( "brown" );
  myAL.Add( "fox" );
  myAL.Add( "jumps" );
  myAL.Add( "over" );
  myAL.Add( "the" );
  myAL.Add( "lazy" );
  myAL.Add( "dog" );
  // Displays the values of the ArrayList.
  Console.WriteLine( "The ArrayList initially contains the following values:" );
  PrintIndexAndValues( myAL );
  // Sorts the values of the ArrayList using the default comparer.
  myAL.Sort();
  Console.WriteLine( "After sorting with the default comparer:" );
  PrintIndexAndValues( myAL );
  // Sorts the values of the ArrayList using the reverse case-insensitive comparer.
  IComparer myComparer = new myReverserClass();
  myAL.Sort( myComparer );
  Console.WriteLine( "After sorting with the reverse case-insensitive comparer:" );
  PrintIndexAndValues( myAL );
 }
 public static void PrintIndexAndValues( IEnumerable myList ) {
  int i = 0;
  foreach ( Object obj in myList )
    Console.WriteLine( "\t[{0}]:\t{1}", i++, obj );
  Console.WriteLine();
 }
}
/*
This code produces the following output.
The ArrayList initially contains the following values:
   [0]:  The
   [1]:  quick
   [2]:  brown
   [3]:  fox
   [4]:  jumps
   [5]:  over
   [6]:  the
   [7]:  lazy
   [8]:  dog
After sorting with the default comparer:
   [0]:  brown
   [1]:  dog
   [2]:  fox
   [3]:  jumps
   [4]:  lazy
   [5]:  over
   [6]:  quick
   [7]:  the
   [8]:  The
After sorting with the reverse case-insensitive comparer:
   [0]:  the
   [1]:  The
   [2]:  quick
   [3]:  over
   [4]:  lazy
   [5]:  jumps
   [6]:  fox
   [7]:  dog
   [8]:  brown
*/

希望本文所述对大家的C#程序设计有所帮助。