Check value existance in Hashtable - CSharp Collection

CSharp examples for Collection:Hashtable

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Description

Check value existance in Hashtable

Demo Code

using System;//from w  w w .  ja va2s.c o m
using System.Collections;
class Program {
   static void Main(string[] args) {
      Hashtable ht = new Hashtable();
      ht.Add("001", "Z");
      ht.Add("002", "A");
      ht.Add("003", "J");
      ht.Add("004", "M");
      if (ht.ContainsValue("N")) {
         Console.WriteLine("This student name is already in the list");
      } else {
         ht.Add("008", "N");
      }
      // Get a collection of the keys.
      ICollection key = ht.Keys;
      foreach (string k in key) {
         Console.WriteLine(k + ": " + ht[k]);
      }
   }
}

Result


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