Use IComparer : Compare « Collections Data Structure « C# / C Sharp
Use IComparer
/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Use IComparer.
using System;
using System.Collections;
// Create an IComparer for Inventory objects.
class CompInv : IComparer {
// Implement the IComparable interface.
public int Compare(object obj1, object obj2) {
Inventory a, b;
a = (Inventory) obj1;
b = (Inventory) obj2;
return a.name.CompareTo(b.name);
}
}
class Inventory {
public 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);
}
}
public class MailList {
public static void Main() {
CompInv comp = new CompInv();
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 using an IComparer.
inv.Sort(comp);
Console.WriteLine("Inventory list after sorting:");
foreach(Inventory i in inv) {
Console.WriteLine(" " + i);
}
}
}
