Use the ContainsValue() method to check if Hashtable contains a value
using System;
using System.Collections;
class MainClass
{
public static void Main()
{
Hashtable myHashtable = new Hashtable();
myHashtable.Add("AL", "Alabama");
myHashtable.Add("CA", "California");
myHashtable.Add("FL", "Florida");
myHashtable.Add("NY", "New York");
myHashtable.Add("WY", "Wyoming");
foreach (string myKey in myHashtable.Keys)
{
Console.WriteLine("myKey = " + myKey);
}
foreach(string myValue in myHashtable.Values)
{
Console.WriteLine("myValue = " + myValue);
}
if (myHashtable.ContainsValue("Florida"))
{
Console.WriteLine("myHashtable contains the value Florida");
}
}
}
Output
myKey = NY
myKey = CA
myKey = FL
myKey = WY
myKey = AL
myValue = New York
myValue = California
myValue = Florida
myValue = Wyoming
myValue = Alabama
myHashtable contains the value Florida