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How to create a shallow copy of Hashtable in C#?
To create a shallow copy of 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("1", "AB");
hash.Add("2", "BC");
hash.Add("3", "DE");
hash.Add("4", "EF");
hash.Add("5", "GH");
hash.Add("6", "IJ");
hash.Add("7", "KL");
hash.Add("8", "MN");
hash.Add("9", "OP");
hash.Add("10", "QR");
Console.WriteLine("Hashtable elements...");
foreach(DictionaryEntry d in hash) {
Console.WriteLine("Key = "+d.Key + ", Value = " + d.Value);
}
Hashtable hash2 = (Hashtable)hash.Clone();
Console.WriteLine("
Hashtable elements...cloned");
foreach(DictionaryEntry d in hash2) {
Console.WriteLine("Key = "+d.Key + ", Value = " + d.Value);
}
}
}Output
This will produce the following output −
Hashtable elements... Key = 10, Value = QR Key = 1, Value = AB Key = 2, Value = BC Key = 3, Value = DE Key = 4, Value = EF Key = 5, Value = GH Key = 6, Value = IJ Key = 7, Value = KL Key = 8, Value = MN Key = 9, Value = OP Hashtable elements...cloned Key = 10, Value = QR Key = 1, Value = AB Key = 2, Value = BC Key = 3, Value = DE Key = 4, Value = EF Key = 5, Value = GH Key = 6, Value = IJ Key = 7, Value = KL Key = 8, Value = MN Key = 9, Value = OP
Example
Let us see another example −
using System;
using System.Collections;
public class Demo {
public static void Main() {
Hashtable hash = new Hashtable();
hash.Add("A", "Electronics");
hash.Add("B", "Appliances");
hash.Add("C", "Pet Supplies");
hash.Add("D", "Books");
hash.Add("E", "Toys");
hash.Add("F", "Footwear");
hash.Add("G", "Clothing");
Console.WriteLine("Hashtable elements...");
foreach(DictionaryEntry d in hash) {
Console.WriteLine("Key = "+d.Key + ", Value = " + d.Value);
}
ICollection col = hash.Keys;
Console.WriteLine("
Displaying only the keys...");
foreach(string str in col)
Console.WriteLine(str + ": " + hash[str]);
Hashtable hash2 = (Hashtable)hash.Clone();
Console.WriteLine("
Hashtable elements...cloned");
foreach(DictionaryEntry d in hash2) {
Console.WriteLine("Key = "+d.Key + ", Value = " + d.Value);
}
}
}Output
This will produce the following output −
Hashtable elements... Key = G, Value = Clothing Key = A, Value = Electronics Key = B, Value = Appliances Key = C, Value = Pet Supplies Key = D, Value = Books Key = E, Value = Toys Key = F, Value = Footwear Displaying only the keys... G: Clothing A: Electronics B: Appliances C: Pet Supplies D: Books E: Toys F: Footwear Hashtable elements...cloned Key = G, Value = Clothing Key = A, Value = Electronics Key = B, Value = Appliances Key = C, Value = Pet Supplies Key = D, Value = Books Key = E, Value = Toys Key = F, Value = Footwear
Updated on: 10-Dec-2019
156 Views
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