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Adding an element into the Hashtable in C#
To add an element into the Hashtable, the code is as follows −
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("Count of entries in Hashtable = "+ hash.Count);
hash.Add("11", "K");
Console.WriteLine("Hashtable Key and Value pairs...UPDATED");
foreach(DictionaryEntry entry in hash){
Console.WriteLine("{0} and {1} ", entry.Key, entry.Value);
}
Console.WriteLine("Count of entries in Hashtable (updated) = "+hash.Count);
}
}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 Count of entries in Hashtable = 10 Hashtable Key and Value pairs...UPDATED 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 11 and K Count of entries in Hashtable (updated) = 11
Example
Let us now see another example −
using System;
using System.Collections;
public class Demo {
public static void Main(){
Hashtable hash = new Hashtable(10);
hash.Add("1", "SUV");
hash.Add("2", "Electric Cars");
hash.Add("3", "AUV");
hash.Add("4", "Utility Vehicle");
hash.Add("5","Compact Car");
hash.Add("6", "Sedan");
hash.Add("7","Crossover");
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 −
Enumerator to iterate through the Hashtable... Key = 1, Value = SUV Key = 2, Value = Electric Cars Key = 3, Value = AUV Key = 4, Value = Utility Vehicle Key = 5, Value = Compact Car Key = 6, Value = Sedan Key = 7, Value = Crossover
Updated on: 10-Dec-2019
226 Views
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