<%@ page language="vb" runat="server" Debug="true"%>
Public Class Key
Private _Shape As Integer
Public Sub New(newshape As Integer)
_Shape = newshape
End Sub
Public ReadOnly Property Shape As Integer
Get
Return _Shape
End Get
End Property
End Class
Public Class Car
Private _Color As String
Private _Gear As Integer
Private _Ignition As Integer
Private _EngineRunning As Boolean
Private Shared _Count = 0
Public Shared ReadOnly Property Count As Integer
Get
Return _Count
End Get
End Property
Public Property Color As String
Get
Return _Color
End Get
Set(value As String)
_Color = value
End Set
End Property
Public ReadOnly Property Gear As Integer
Get
Return _Gear
End Get
End Property
Public ReadOnly Property IsRunning As String
Get
If _EngineRunning Then
Return "The engine is running."
Else
Return "The engine is not running."
End If
End Get
End Property
Overloads Public Sub ChangeGear(direction As Integer)
If direction < 0 Then _Gear -= 1
If direction > 0 Then _Gear += 1
If _Gear > 5 Then _gear = 5
If _Gear < -1 Then _gear = -1
End Sub
Overloads Public Sub ChangeGear(direction As String)
If direction = "down" Then ChangeGear(-1)
If direction = "up" Then ChangeGear(+1)
End Sub
Public Sub Ignition(IgnitionKey as Key)
If IgnitionKey.Shape = _Ignition Then _EngineRunning = True
End Sub
Public Sub EngineOff()
_EngineRunning = False
End Sub
Sub New(IgnitionShape as Integer)
_Color = "cold grey steel"
_Ignition = IgnitionShape
_Count += 1
End Sub
End Class
Sub Page_Load()
Dim AlexKey As New Key(0987654321)
Dim RobKey As New Key(1861005040)
Dim MyKey As New Key(1234567890)
Dim MyCar As New Car(1234567890)
Response.Write("New object 'MyCar' created.")
Response.Write("
Color: " & MyCar.Color)
Response.Write("
Gear: " & MyCar.Gear)
MyCar.Color = "Black"
MyCar.ChangeGear(+1)
Response.Write("
Properties updated.")
Response.Write("
New color: " & MyCar.Color)
Response.Write("
New gear: " & MyCar.Gear)
MyCar.ChangeGear("up")
Response.Write("
Shifted 'up' one gear.")
Response.Write("
New gear: " & MyCar.Gear)
Response.Write("
Attempting to start MyCar with AlexKey: ")
MyCar.Ignition(AlexKey)
Response.Write(MyCar.IsRunning)
Response.Write("
Attempting to start MyCar with RobKey: ")
MyCar.Ignition(RobKey)
Response.Write(MyCar.IsRunning)
Response.Write("
Attempting to start MyCar with MyKey: ")
MyCar.Ignition(MyKey)
Response.Write(MyCar.IsRunning)
Response.Write("
Attempting to stop MyCar: ")
MyCar.EngineOff()
Response.Write(MyCar.IsRunning)
End Sub