Mega Code Archive
Implements IComparer
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using System;
using System.Collections.Generic;
// Create an IComparer<T> for Product objects.
class ProductComparer<T> : IComparer<T> where T : Product {
// Implement the IComparer<T> interface.
public int Compare(T obj1, T obj2) {
return obj1.name.CompareTo(obj2.name);
}
}
class Product {
public string name;
double cost;
int onhand;
public Product(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);
}
}
class MainClass {
public static void Main() {
ProductComparer<Product> comp = new ProductComparer<Product>();
List<Product> inv = new List<Product>();
// Add elements to the list
inv.Add(new Product("A", 5.5, 3));
inv.Add(new Product("B", 8.9, 2));
inv.Add(new Product("C", 3.0, 4));
inv.Add(new Product("D", 1.8, 8));
Console.WriteLine("Product list before sorting:");
foreach(Product i in inv) {
Console.WriteLine(" " + i);
}
Console.WriteLine();
// Sort the list using an IComparer.
inv.Sort(comp);
Console.WriteLine("Product list after sorting:");
foreach(Product i in inv) {
Console.WriteLine(" " + i);
}
}
}
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