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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Person scott = new Person("A", "B");
Person bill = new Person("C", "D");
Person srini = new Person("E", "F");
Person[] people = { scott, bill, srini };
Response.Write("Unsorted. We used foreach.<BR/>");
foreach (Person p in people)
{
Response.Write(p.FullName + "<BR/>");
}
Response.Write("Sort...<BR/>");
Array.Sort(people);
Response.Write("Sorted. We used foreach.<BR/>");
foreach (Person p in people)
{
Response.Write(p.FullName + "<BR/>");
}
}
}
public class Person : IComparable
{
string FirstName;
string LastName;
public Person(string first, string last)
{
FirstName = first;
LastName = last;
}
public string FullName
{
get
{
return FirstName + " " + LastName;
}
}
int IComparable.CompareTo(object obj)
{
Person p2 = obj as Person;
if (p2 == null) throw new ArgumentException("Object is not a Person!");
int lastNameResult = this.LastName.CompareTo(p2.LastName);
if (lastNameResult == 0)
{
int firstNameResult = this.FirstName.CompareTo(p2.FirstName);
return firstNameResult;
}
else
{
return lastNameResult;
}
}
}
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