frmviewsnippet.frm

一个完整的HTML编辑器

VERSION 5.00
Begin VB.Form frmViewCD 
   Caption         =   "View CD"
   ClientHeight    =   8790
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   10170
   LinkTopic       =   "Form1"
   ScaleHeight     =   8790
   ScaleWidth      =   10170
   StartUpPosition =   3  'Windows Default
   Begin VB.TextBox txtCDID 
      Height          =   285
      Left            =   840
      TabIndex        =   4
      Top             =   240
      Width           =   855
   End
   Begin VB.TextBox txtTitle 
      Height          =   285
      Left            =   840
      TabIndex        =   3
      Top             =   600
      Width           =   2415
   End
   Begin VB.TextBox txtArtist 
      Height          =   7005
      Left            =   840
      MultiLine       =   -1  'True
      ScrollBars      =   3  'Both
      TabIndex        =   2
      Top             =   960
      Width           =   8655
   End
   Begin VB.CommandButton cmdView 
      Caption         =   "View CD"
      Height          =   375
      Left            =   3600
      TabIndex        =   1
      Top             =   120
      Width           =   1095
   End
   Begin VB.CommandButton cmdDone 
      Caption         =   "Done"
      Height          =   375
      Left            =   4800
      TabIndex        =   0
      Top             =   120
      Width           =   1095
   End
   Begin VB.Label Label1 
      Caption         =   "CD ID:"
      Height          =   255
      Index           =   0
      Left            =   240
      TabIndex        =   6
      Top             =   240
      Width           =   495
   End
   Begin VB.Label Label1 
      Caption         =   "Title:"
      Height          =   255
      Index           =   1
      Left            =   360
      TabIndex        =   5
      Top             =   600
      Width           =   375
   End
End
Attribute VB_Name = "frmViewCD"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
'##########################
Dim NumRecords As Integer
Dim intFileNum As Integer
Dim lngRecLength As Long
'##########################



Private Type ViewCD
    intID As Integer
    strTitle As String * 30
    strArtist As String * 30
End Type

Private Sub cmdDone_Click()
Unload frmViewCD
End Sub

Private Sub cmdView_Click()
Dim udtCDToView As ViewCD
Dim intCDFile As Integer, lngRecLength As Long
Dim lngTotalRecords As Long, lngCDID As Long
Dim intFileNum As Integer
Dim NumRecords As Long
intFileNum = FreeFile
'Open File
intCDFile = FreeFile
lngRecLength = LenB(udtCDToView)
Open "c:\CdIndex.dat" For Random As #intCDFile Len = lngRecLength

'# of Rec.
If LOF(intFileNum) Mod lngRecLength = 0 Then
NumRecords = (LOF(intCDFile) \ lngRecLength)
Else
NumRecords = (LOF(intCDFile) \ lngRecLength) + 1
End If
lngTotalRecords = NumRecords

'View Rec if Valid
    If lngTotalRecords = 0 Then
MsgBox "No CD to View"
cmdView.Enabled = False
Else
lngCDID = txtCDID.Text
   If lngCDID > 0 And lngCDID <= lngTotalRecords Then
Get #intCDFile, lngCDID, udtCDToView
txtTitle.Text = udtCDToView.strTitle
txtArtist.Text = udtCDToView.strArtist

Else
Call InitializeForm
MsgBox "Please Enter Valid CD ID"
    End If
   End If
Close #intCDFile
End Sub

Private Sub Form_Load()
Call InitializeForm
End Sub

Sub InitializeForm()
txtCDID.Text = ""
txtArtist.Text = ""
txtTitle.Text = ""
End Sub

Private Sub txtCDID_Change()
txtArtist.Text = ""
txtTitle.Text = ""
End Sub