Để kiểm tra xem Hashtable có chứa một giá trị cụ thể hay không, mã như sau -
Ví dụ
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 value? = "+hash.ContainsValue("H")); } }
Đầu ra
Điều này sẽ tạo ra kết quả sau -
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 value? = True
Ví dụ
Hãy để chúng tôi xem một ví dụ khác -
using System; using System.Collections; public class Demo { 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")); Console.WriteLine("The Hashtable consists of the value? = "+hash.ContainsValue("Illeana")); } }
Đầu ra
Điều này sẽ tạo ra kết quả sau -
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 The Hashtable consists of the value? = True