1.ArrayList动态数组，保存值的时候比较好用

4.Dictionary<K,V>

3.List<T>

二、各种集合的遍历方法演示

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Key foreach (Object obj in list.Keys) { Console.WriteLine((string)obj); } //遍历Value foreach (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); }

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); }

//遍历Values foreach (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

//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); }

1.ArrayList

一、先来分别介绍一下ArrayList，Hashtable，List<T>，Dictionary<K,V>