Implement IComparable : Compare « Collections Data Structure « C# / C Sharp
Implement IComparable
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Implement IComparable.
using System;
using System.Collections;
class Inventory : IComparable {
string name;
double cost;
int onhand;
public Inventory(string n, double c, int h) {
name = n;
cost = c;
onhand = h;
}
public override string ToString() {
return
String.Format("{0,-10}Cost: {1,6:C} On hand: {2}",
name, cost, onhand);
}
// Implement the IComparable interface.
public int CompareTo(object obj) {
Inventory b;
b = (Inventory) obj;
return name.CompareTo(b.name);
}
}
public class IComparableDemo {
public static void Main() {
ArrayList inv = new ArrayList();
// Add elements to the list
inv.Add(new Inventory("Pliers", 5.95, 3));
inv.Add(new Inventory("Wrenches", 8.29, 2));
inv.Add(new Inventory("Hammers", 3.50, 4));
inv.Add(new Inventory("Drills", 19.88, 8));
Console.WriteLine("Inventory list before sorting:");
foreach(Inventory i in inv) {
Console.WriteLine(" " + i);
}
Console.WriteLine();
// Sort the list.
inv.Sort();
Console.WriteLine("Inventory list after sorting:");
foreach(Inventory i in inv) {
Console.WriteLine(" " + i);
}
}
}
