数据备份.frm

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VERSION 5.00
Begin VB.Form 数据备份 
   Caption         =   "图书管理系统"
   ClientHeight    =   4305
   ClientLeft      =   5880
   ClientTop       =   1920
   ClientWidth     =   4470
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   ScaleHeight     =   4305
   ScaleWidth      =   4470
   Begin VB.DriveListBox Drv1 
      Height          =   300
      Left            =   1320
      TabIndex        =   3
      Top             =   240
      Width           =   2895
   End
   Begin VB.DirListBox Dir1 
      Height          =   2190
      Left            =   1320
      TabIndex        =   2
      Top             =   720
      Width           =   2895
   End
   Begin VB.TextBox Txtfilename1 
      Height          =   375
      Left            =   1320
      TabIndex        =   1
      Top             =   3000
      Width           =   2895
   End
   Begin VB.CommandButton save 
      Caption         =   "存储"
      Height          =   375
      Left            =   1680
      TabIndex        =   0
      Top             =   3720
      Width           =   855
   End
   Begin VB.Label Label21 
      AutoSize        =   -1  'True
      Caption         =   "文件路径"
      Height          =   180
      Left            =   240
      TabIndex        =   6
      Top             =   720
      Width           =   720
   End
   Begin VB.Label Label22 
      AutoSize        =   -1  'True
      Caption         =   "文件名称"
      Height          =   180
      Left            =   240
      TabIndex        =   5
      Top             =   3000
      Width           =   720
   End
   Begin VB.Label Label23 
      AutoSize        =   -1  'True
      Caption         =   "逻辑盘符"
      Height          =   180
      Left            =   240
      TabIndex        =   4
      Top             =   240
      Width           =   720
   End
End
Attribute VB_Name = "数据备份"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Drv1_Change()
    Dir1.Path = Drv1.Drive
End Sub

Private Sub Dir1_Change()
    If Trim(Txtfilename1) = "" Then
        Txtfilename1 = Dir1.Path + "\"
    Else
        Txtfilename1 = Dir1.Path + "\" + Right(Txtfilename1, Len(Txtfilename1) - InStrRev(Txtfilename1, "\"))
    End If
End Sub

Private Sub Form_Load()
    Txtfilename1 = Dir1.Path + "\"
End Sub

Private Sub Form_Unload(Cancel As Integer)
    系统操作.Show
End Sub

Private Sub save_Click()
    On Error GoTo ERR
    Dim strSource As String
    Dim strDestfile As String
    Dim fso As New Scripting.FileSystemObject
    Dim fil As Scripting.File
    
    '输入备份文件名
    strDestfile = Trim(Right(Txtfilename1, Len(Txtfilename1) - InStrRev(Txtfilename1, "\")))
    If strDestfile = "" Then
        MsgBox "请您输入备份文件名!"
        Txtfilename1.SetFocus
        ERR.Raise 3001
    Else
        strSource = App.Path + "\Libarary.mdb"
        '若不存在源文件，则报错
        If Not fso.FileExists(strSource) Then MsgBox "源文件不存在": ERR.Raise 3001
        '若存在目的备份文件,则先删除
        If fso.FileExists(Txtfilename1) Then
            If MsgBox("是否要删除目的备份文件？", vbOKCancel) = vbCancel Then MsgBox "请你换个备份文件名": Txtfilename1.SetFocus: ERR.Raise 3001
            fso.DeleteFile Txtfilename1
        End If
        fso.CopyFile strSource, Txtfilename1, True
        MsgBox "备份完毕"
        Unload Me
    End If
    Exit Sub
ERR:
    If ERR.Number = 3001 Then Exit Sub
End Sub