学步园

private void Form1_Load(object sender, EventArgs e)<br /> {<br /> Hashtable ht = new Hashtable();</p> <p> ht.Add("job", "a");<br /> ht.Add("jobmon", "20");</p> <p> //单个取值，方法比较特别<br /> string a = ht["jobmon"].ToString();<br /> //Console.WriteLine(a);</p> <p> //第一种方法遍历<br /> foreach(DictionaryEntry de in ht)<br /> {<br /> Console.WriteLine(de.Key);<br /> Console.WriteLine(de.Value);<br /> }</p> <p> Console.WriteLine("-------------------------");</p> <p> //第二种方法遍历<br /> IDictionaryEnumerator enumerator = ht.GetEnumerator();<br /> while (enumerator.MoveNext())<br /> {<br /> Console.WriteLine(enumerator.Key);<br /> Console.WriteLine(enumerator.Value);<br /> }</p> <p> Console.WriteLine("++++++++++++++++++++++++++");<br /> //hashtable的排序第一种方法，按照键的大小排序</p> <p> ArrayList al = new ArrayList(ht.Keys);</p> <p> al.Sort();<br /> al.Reverse(); //反向排序</p> <p> foreach (string str in al)<br /> {<br /> Console.WriteLine(str + " " + ht[str]);<br /> }</p> <p> Console.WriteLine("++++++++++++++++++++++++++");<br /> //hashtable的排序第二种方法，按照值的大小排序</p> <p> ArrayList alv = new ArrayList(ht.Values);<br /> alv.Sort();</p> <p> foreach (string str in alv)<br /> {<br /> IDictionaryEnumerator enumerator2 = sl.GetEnumerator();</p> <p> while (enumerator2.MoveNext())<br /> {<br /> if (str.Equals(enumerator2.Value.ToString()))<br /> {</p> <p> Console.WriteLine(enumerator2.Key + ":" + enumerator2.Value);<br /> }</p> <p> }</p> <p> }</p> <p> Console.WriteLine("++++++++++++++++++++++++++");<br /> //hashtable的排序第三种方法，用SortedList代替hashtable</p> <p> SortedList sl = new SortedList();</p> <p> sl.Add("a", "a1");<br /> sl.Add("c", "c1");<br /> sl.Add("b", "b1");</p> <p> IDictionaryEnumerator enumerator1 = sl.GetEnumerator();<br /> while (enumerator1.MoveNext())<br /> {<br /> Console.WriteLine(enumerator1.Key);<br /> Console.WriteLine(enumerator1.Value);<br /> }</p> <p> }