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。