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
Count the number of key/value pairs in the Hashtable in C#
To count the number of key/value pairs in the Hashtable, the code is as follows −
Example
using System;
using System.Collections;
public class Demo {
public static void Main() {
Hashtable hash = new Hashtable();
hash.Add("A", "SUV");
hash.Add("B", "MUV");
hash.Add("C", "AUV");
Console.WriteLine("Hashtable elements...");
foreach(DictionaryEntry d in hash) {
Console.WriteLine(d.Key + " " + d.Value);
}
Console.WriteLine("Count of Key/value pairs = "+hash.Count);
hash.Add("D", "Utility Vehicle");
hash.Add("E", "Convertible");
Console.WriteLine("Count of Key/value pairs (Updated) = "+hash.Count);
}
}Output
This will produce the following output −
Hashtable elements... C AUV A SUV B MUV Count of Key/value pairs = 3 Count of Key/value pairs (Updated) = 5
Example
Let us see another example −
using System;
using System.Collections;
public class Demo {
public static void Main() {
Hashtable hash = new Hashtable(10);
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 the Hashtable having fixed size? = "+hash.IsFixedSize);
Console.WriteLine("Count of key/value pairs in Hashtable = "+ hash.Count);
Console.WriteLine("
Enumerator to iterate through the Hashtable...");
IDictionaryEnumerator demoEnum = hash.GetEnumerator();
while (demoEnum.MoveNext())
Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);
}
}Output
This will produce the following output −
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 the Hashtable having fixed size? = False Count of key/value pairs in Hashtable = 10 Enumerator to iterate through the Hashtable... Key = 10, Value = J Key = 1, Value = A Key = 2, Value = B Key = 3, Value = C Key = 4, Value = D Key = 5, Value = E Key = 6, Value = F Key = 7, Value = G Key = 8, Value = H Key = 9, Value = I
Updated on: 11-Dec-2019
235 Views
Advertisements