Implementing an IComparable interface to a Class

Here I have given an example of how to sort an Person class on the basis of its attribute by implementing IComparable interface.

Many time we need to use sorting with our objects of custom classes.

Here I have given an example of how to sort an Person class on the basis of its attribute by implementing IComparable interface.

using System;

//Add refrence to Collections namespace
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;
    }

   //Overriding the ToString() method to show the output formatted
    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);
        }
    }
}

Happy coding.

Cheers.