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C# Program to find a value in a Hashtable
Set Hahtable collection with elements.
Hashtable h = new Hashtable(); h.Add(1, "Jack"); h.Add(2, "Henry"); h.Add(3, "Ben"); h.Add(4, "Chris");
Let’s say now you need to find a value, then use the ContainsValue() method.
We are finding value “Chris” here −
h.ContainsValue(“Chris”);
Example
using System; using System.Collections; public class Demo { public static void Main() { Hashtable h = new Hashtable(); h.Add(1, "Jack"); h.Add(2, "Henry"); h.Add(3, "Ben"); h.Add(4, "Chris"); Console.WriteLine("Keys and Values list:"); foreach (var key in h.Keys ) { Console.WriteLine("Key = {0}, Value = {1}",key , h[key]); } Console.WriteLine("Value Chris exists? "+h.ContainsValue("Chris")); Console.WriteLine("Value Tom exists? "+h.ContainsValue("Tom")); } }
Output
Keys and Values list: Key = 4, Value = Chris Key = 3, Value = Ben Key = 2, Value = Henry Key = 1, Value = Jack Value Chris exists? True Value Tom exists? False
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