sample39.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.Collections;
	public class TestHashtableClass
	{
		public static void Main()  
		{	
			TestHashtableClass t=new TestHashtableClass();
			Hashtable testHT = new Hashtable();
			testHT.Add( "1", "one" );
			//使用Add方法添加键和值
			testHT.Add( "2", "two" );
			testHT.Add( "3", "three" );
			testHT.Add( "4", "four" );
			testHT.Add( "5", "five" );
			Console.WriteLine( "该Hashtable对象元素是：" );
			t.PrintValues( testHT );
			testHT.Remove("4");
			Console.WriteLine( "删除键为4的元素后：" );
			t.PrintValues( testHT );
			Console.Write( "查找该Hashtable对象是否有键为5的元素：" );
			Console.WriteLine(testHT.Contains("5"));
			//使用Contains方法来确定
			Console.Write( "查找该Hashtable对象是否有键为4的元素：" );
			Console.WriteLine(testHT.ContainsKey("4"));
			//使用ContainsKey方法来判断，它和Contains方法是一样的
			Console.Write( "查找该Hashtable对象是否有值为three的元素：" );
			Console.WriteLine(testHT.ContainsValue("three"));
			Hashtable synHT=Hashtable.Synchronized(testHT);
			//使用Synchronized方法获取testHT的同步Hashtable对象
			Console.WriteLine("下面查看synHT=Hashtable.Synchronized(testHT)操作后的同步情况");
			Console.WriteLine("testHT是否被同步？"+testHT.IsSynchronized);
			Console.WriteLine("synHT是否被同步？"+synHT.IsSynchronized);
		}
		public void PrintValues( Hashtable hashTable)  
		{
			IDictionaryEnumerator testEnumerator = hashTable.GetEnumerator();
			//使用GetEnumerator方法获取IDictionaryEnumerator
			Console.WriteLine( " 关键字：值 " );
			while ( testEnumerator.MoveNext() )
			
				Console.WriteLine( " "+testEnumerator.Key+":"+ testEnumerator.Value );
		
			Console.WriteLine();
		}
	}
}