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C#中Arraylist的sort函数用法实例分析

作者:dongfengkuayue

这篇文章主要介绍了C#中Arraylist的sort函数用法,较为详细的分析了ArrayList的sort函数的功能、定义及具体使用技巧,具有一定参考借鉴价值,需要的朋友可以参考下

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。

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