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[ASP.net教程]ArrayList,Hashtable,ListT,DictionaryK,V


1.ArrayList  

      ArrayList list = new ArrayList();//for遍历      for (int i = 0; i < list.Count; i++)      {        SE se=(SE)list[i];        Console.WriteLine(se.Name);      }//foreach遍历     foreach(Object obj in list)     {       SE se=(SE)list[i];       Console.WriteLine(se.Name);         }

2.Hashtable

Hashtable list=new Hashtable();//Hashtable不能用索引访问,所以遍历一个Hashtable只能用foreache()方法//遍历Keyforeach(Object obj in list.Keys){ Console.WriteLine((string)obj);}//遍历Valueforeach(Object obj in list.Values){ SE se=(SE)obj; Console.WriteLine(se.Name);}//同时遍历,DictionaryEntry一个结构foreach(DictionaryEntry en in list){ Console.WriteLine(se.Keys); COnsole.WriteLine(((SE)en.Value).Name);}

3.List<T>

     //for遍历      for (int i = 0; i < list.Count; i++)      {        //遍历时不需要类型转换        Console.WriteLine(list[i]);      }//foreach遍历     foreach(SE obj in list)     {        //遍历时不需要类型转换       Console.WriteLine(obj);         }//

4.Dictionary<K,V>

//遍历Valuesforeach(SE se in list.Values){   //遍历时不需要类型转换   Console.WriteLine(se);}//同时遍历foreach(KeyValuePair<string,SE> en in list){ Console.WriteLine(en.Key); Console.WriteLine(en.Value.Name);}//KeyValuePair<TKey,TValue>是一个泛型结构