frmreturnbook.frm

中小型图书馆管理系统开发

VERSION 5.00
Begin VB.Form frmReturnBook 
   Caption         =   "还书"
   ClientHeight    =   1695
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4125
   LinkTopic       =   "Form1"
   ScaleHeight     =   1695
   ScaleWidth      =   4125
   StartUpPosition =   3  'Windows Default
   Begin VB.CommandButton Command2 
      Caption         =   "返回(&C)"
      Height          =   375
      Left            =   2280
      TabIndex        =   4
      Top             =   1200
      Width           =   1215
   End
   Begin VB.CommandButton cmdOk 
      Caption         =   "归还(&Y)"
      Height          =   375
      Left            =   600
      TabIndex        =   3
      Top             =   1200
      Width           =   1215
   End
   Begin VB.Frame Frame1 
      Height          =   855
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   3975
      Begin VB.TextBox txtBookid 
         Height          =   495
         Left            =   1680
         TabIndex        =   2
         Top             =   240
         Width           =   2175
      End
      Begin VB.Label Label1 
         Caption         =   "请输入图书编号："
         Height          =   255
         Left            =   120
         TabIndex        =   1
         Top             =   360
         Width           =   1575
      End
   End
End
Attribute VB_Name = "frmReturnBook"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim conn As New ADODB.Connection
Dim cmd As New ADODB.Command
Dim rs As New ADODB.Recordset
Dim sql As String

Private Sub cmdOk_Click()
sql = "SELECT * FROM lendBook where bookid='" & txtBookid & "' AND hasreturned=false"
cmd.CommandText = sql
rs.Open cmd, , adOpenDynamic, adLockOptimistic
rs.MoveFirst
rs.Update "hasreturned", True

MsgBox "图书已归还！！"
rs.Close

End Sub

Private Sub Command2_Click()
Unload Me

End Sub

Private Sub Form_Load()

'窗体居中显示
Me.Top = (Screen.Height - Me.Height) \ 2
Me.Left = (Screen.Width - Me.Width) \ 2


'使用Connection对象与具体的数据库文件相连接
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db\library.mdb"

'每个Command必须与一个Connection对象连接
Set cmd.ActiveConnection = conn

'设置命令的类型是使用SQL语句
cmd.CommandType = adCmdText

End Sub