Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
C# Program to find a key in a Hashtable
Set Hashtable 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 any key, then use the Contains() method. We are finding key 3 here −
h.Contains(3);
The following is the complete example.
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("Key 3 exists? "+h.Contains(3));
}
}Output
Keys and Values list: Key = 4, Value = Chris Key = 3, Value = Ben Key = 2, Value = Henry Key = 1, Value = Jack Key 3 exists? True
Updated on: 23-Jun-2020
412 Views
Advertisements