ctime2.cls

Visual Basic 6 大学教程的代码

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "CTime2"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' Fig. 16.4
' Class definition for CTime2
' This class enhances CTime1 by providing Property procedures
' for Hour, Minute and Second properties

Option Explicit

Private mHour As Integer
Private mMinute As Integer
Private mSecond As Integer

Public Sub SetTime(ByVal h As Integer, ByVal m As Integer, _
                   ByVal s As Integer)
   
   mHour = ValidateHour(h)
   mMinute = ValidateMinute(m)
   mSecond = ValidateSecond(s)
End Sub

Public Function ToUniversalTime() As String
   ToUniversalTime = Format$(mHour, "00") & ":" & _
                     Format$(mMinute, "00") & ":" & _
                     Format$(mSecond, "00")
End Function

Public Function ToStandardTime() As String
   Dim h As Integer
   
   h = IIf((mHour = 12 Or mHour = 0), 12, mHour Mod 12)
   
   ToStandardTime = h & ":" & _
                    Format$(mMinute, "00") & ":" & _
                    Format$(mSecond, "00") & " " & _
                    IIf(mHour < 12, "AM", "PM")
End Function

Public Property Get Hour() As Integer
   Hour = mHour
End Property

Public Property Let Hour(ByVal h As Integer)
   mHour = ValidateHour(h)
End Property
Public Property Get Minute() As Integer
   Minute = mMinute
End Property

Public Property Let Minute(ByVal m As Integer)
   mMinute = ValidateMinute(m)
End Property
Public Property Get Second() As Integer
   Second = mSecond
End Property
Public Property Let Second(ByVal s As Integer)
   mSecond = ValidateSecond(s)
End Property

Private Function ValidateHour(ByVal h As Integer)
   ValidateHour = IIf((h >= 0 And h < 24), h, 0)
End Function

Private Function ValidateMinute(ByVal m As Integer)
   ValidateMinute = IIf((m >= 0 And m < 60), m, 0)
End Function

Private Function ValidateSecond(ByVal s As Integer)
   ValidateSecond = IIf((s >= 0 And s < 60), s, 0)
End Function