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法律研究检查哈希表中是否包含特定的键，代码如下 -
检查哈希表中是否包含特定键，代码如下 -
示例
using System;
using System.Collections;
public class Demo {
public static void Main()
public static void Main(){
Hashtable hash = new Hashtable();
hash.Add("One", "Katie");
hash.Add("Two", "John");
hash.Add("Three", "Barry");
hash.Add("Four", "Mark");
hash.Add("Five","Harry");
hash.Add("Six", "Nathan");
hash.Add("Seven", "Tom");
hash.Add("Eight","Andy");
hash.Add("Nine", "Illeana");
hash.Add("Ten", "Tim");
Console.WriteLine("Hashtable Key and Value pairs...");
foreach(DictionaryEntry entry in hash){
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("Is Hashtable having fixed size? = "+hash.IsFixedSize);
Console.WriteLine("If Hashtable read-only? = "+hash.IsReadOnly);
Console.WriteLine("The Hashtable consists of the key? = "+hash.ContainsKey("Seven"));
}
}输出
这将产生如下输出 -
Hashtable Key and Value pairs... One and Katie Ten and Tim Five and Harry Three and Barry Seven and Tom Two and John Four and Mark Eight and Andy Nine and Illeana Six and Nathan Is Hashtable having fixed size? = False If Hashtable read-only? = False The Hashtable consists of the key? = True
示例
让我们看另一个示例 -
using System;
using System.Collections;
public class Demo {
public static void Main(){
Hashtable hash = new Hashtable();
hash.Add("1", "A");
hash.Add("2", "B");
hash.Add("3", "C");
hash.Add("4", "D");
hash.Add("5","E");
hash.Add("6", "F");
hash.Add("7", "G");
hash.Add("8","H");
hash.Add("9", "I");
hash.Add("10", "J");
Console.WriteLine("Hashtable Key and Value pairs...");
foreach(DictionaryEntry entry in hash){
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("Is Hashtable having fixed size? = "+hash.IsFixedSize);
Console.WriteLine("If Hashtable read-only? = "+hash.IsReadOnly);
Console.WriteLine("The Hashtable consists of the key? = "+hash.ContainsKey("5"));
}
}输出
这将产生如下输出 -
Hashtable Key and Value pairs... 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I Is Hashtable having fixed size? = False If Hashtable read-only? = False The Hashtable consists of the key? = True
更新于: 04-Dec-2019
236 次浏览
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