c#如何对ArrayList排序?

[puzhichen]

具体代码如下：

            ArrayList list = new ArrayList();
            for (int i = 0; i < 10; i++)
            {
                var obj = new { a=i, b=i+1, c=i+2 };
                list.Add(obj);
            }

            foreach (var m in list)
            {
                this.Response.Write(m);
            }

要求：输出的新集合是对b进行排序了的！

[l171147904]

list.sort()

[liherun]

up

[huming_h]

加进去不是有序的吗？

[puzhichen]

不自己实现IComparable接口这种方法 ，有其他方法么。

[Lovely_baby]

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(   "jumped"   );   
              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(   1,   3,   null   );   
              Console.WriteLine(   "After   sorting   from   index   1   to   index   3   with   the   default   comparer:"   );   
              PrintIndexAndValues(   myAL   );   
    
              //   Sorts   the   values   of   the   ArrayList   using   the   reverse   case-insensitive   comparer.   
              IComparer   myComparer   =   new   myReverserClass();   
              myAL.Sort(   1,   3,   myComparer   );   
              Console.WriteLine(   "After   sorting   from   index   1   to   index   3   with   the   reverse   case-insensitive   comparer:"   );   
              PrintIndexAndValues(   myAL   );   
    
        }   
      
        public   static   void   PrintIndexAndValues(   IEnumerable   myList   )     {   
    
              int   i   =   0;   
              System.Collections.IEnumerator   myEnumerator   =   myList.GetEnumerator();   
              while   (   myEnumerator.MoveNext()   )   
                    Console.WriteLine(   "\t[{0}]:\t{1}",   i++,   myEnumerator.Current   );   
              Console.WriteLine();   
    
        }   
  }   

转~

[puzhichen]

加进去的数据是我自己填进去测试的，只是想给大家说清楚下集合结构而已！

[l171147904]

或

class Person {
public String name;
public int id;
public Person (String name,int id) {
this.name=name;this.id=id;
}
..//other methods
}

List l=new ArrayList();
l.add(new Person("张三",1));
...//add some other Person object
Collections.sort(l,new Comparator () {
public int compare(Object o1,Object o2) {
Person p1=(Person)o1;
Person p2=(Person)o2;
return p1.name.compareTo(p2.name);
}
});

[puzhichen]

谢谢楼上几位兄弟，问题解决！给分

[puzhichen]

汗,真对不住5楼，分子给错人了！

[yaowang_11]

汗……害我多看了几眼7楼的代码