C#中的Hashtable 类使用详解

public virtual void Add (object key, object value);

// 创建并初始化新的哈希表.
var myHT = new Hashtable();
myHT.Add("one", "The");
myHT.Add("two", "quick");
myHT.Add("three", "brown");
myHT.Add("four", "fox");

// 显示哈希表.
Console.WriteLine("哈希表包含以下内容:");
Console.WriteLine("\t-KEY-\t-VALUE-");
foreach (DictionaryEntry de in myHT)
{
    Console.WriteLine($"\t{de.Key}:\t{de.Value}");
}

public virtual object Clone ();

// 创建并初始化新的哈希表.
var myHT = new Hashtable();
myHT.Add(1, "Freedom");
myHT.Add(2, "Justice");
myHT.Add(3, "destiny");
myHT.Add(4, "GUNDAM");

// 克隆新的哈希表.
var myHT2 = (Hashtable)myHT.Clone();

// 显示克隆的哈希表.
Console.WriteLine("哈希表包含以下内容:");
Console.WriteLine("\t-KEY-\t-VALUE-");
foreach (DictionaryEntry de in myHT2)
{
    Console.WriteLine($"\t{de.Key}:\t{de.Value}");
}

public virtual bool ContainsKey (object key);
public virtual bool ContainsValue (object value);

// 创建并初始化新的哈希表.
var myHT = new Hashtable();
myHT.Add(1, "Freedom");
myHT.Add(2, "Justice");
myHT.Add(3, "destiny");
myHT.Add(4, "GUNDAM");

Console.WriteLine("The key \"{0}\" is {1}.", 3, myHT.ContainsKey(3) ? "在哈希表中" : "不在在哈希表中");
Console.WriteLine("The key \"{0}\" is {1}.", 6, myHT.ContainsKey(6) ? "在哈希表中" : "不在在哈希表中");

Console.WriteLine("The value \"{0}\" is {1}.", "Freedom", myHT.ContainsValue("Freedom") ? "在哈希表中" : "不在在哈希表中");
Console.WriteLine("The value \"{0}\" is {1}.", "GUNDAM", myHT.ContainsValue("GUNDAM") ? "在哈希表中" : "不在在哈希表中");

public virtual void Remove (object key);

// 创建并初始化新的哈希表.
var myHT = new Hashtable();
myHT.Add(1, "Freedom");
myHT.Add(2, "Justice");
myHT.Add(3, "destiny");
myHT.Add(4, "GUNDAM");
myHT.Remove(4);//移除指定键的元素

foreach (DictionaryEntry de in myHT)
{
    Console.WriteLine($"\t{de.Key}:\t{de.Value}");
}