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<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" 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.vb
Imports System
Imports System.Collections
Imports Microsoft.VisualBasic
Public Class Person
Implements IComparable
Dim FirstName As String
Dim LastName As String
Public Sub New(ByVal First As String, ByVal Last As String)
FirstName = First
LastName = Last
End Sub
Public ReadOnly Property FullName() As String
Get
Return FirstName & " " & LastName
End Get
End Property
Public Function CompareTo(ByVal obj As Object) _
As Integer Implements IComparable.CompareTo
If Not TypeOf (obj) Is Person Then
Throw New ArgumentException("Object is not a Person!")
End If
Dim p2 As Person = CType(obj, Person)
Dim lastNameResult As Integer = Me.LastName.CompareTo(p2.LastName)
If lastNameResult = 0 Then
Dim firstNameResult As Integer = Me.FirstName.CompareTo(p2.FirstName)
Return firstNameResult
Else
Return lastNameResult
End If
End Function
End Class
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Me.Load
Dim scott As New Person("A", "B")
Dim bill As New Person("C", "D")
Dim srini As New Person("E", "F")
Dim people As New ArrayList()
people.Add(scott)
people.Add(bill)
people.Add(srini)
Response.Write("Unsorted. We used foreach.<BR/>")
For Each p As Person In people
Response.Write(p.FullName & "<BR/>")
Next
Response.Write("Sort...<BR/>")
people.Sort()
Response.Write("Sorted. We used foreach.<BR/>")
For Each p As Person In people
Response.Write(p.FullName & "<BR/>")
Next
Dim scott2 As New Person("A", "B")
Dim indexOfA2 As Integer = people.IndexOf(scott2)
Response.Write("A #2 is at " & indexOfA2 & "<BR/>")
Dim indexOfEquivalentA As Integer = people.BinarySearch(scott2)
Response.Write("An Equivalent A is at " & _
indexOfEquivalentA & "<BR/>")
Response.Write("We used a for loop.<BR/>")
For i As Integer = 0 To people.Count - 1
Response.Write(CType(people(i), Person).FullName & "<BR/>")
Next
End Sub
End Class
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