学习.frm

以上所有操作应用程序及数据库均要对其进行合法性有效性验证及相关约束条件检查

VERSION 5.00
Begin VB.Form Libads 
   Caption         =   "Form2"
   ClientHeight    =   4425
   ClientLeft      =   165
   ClientTop       =   855
   ClientWidth     =   7170
   LinkTopic       =   "Form2"
   ScaleHeight     =   4425
   ScaleWidth      =   7170
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "退出"
      Height          =   735
      Left            =   3840
      TabIndex        =   3
      Top             =   2160
      Width           =   1935
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   735
      Left            =   1080
      TabIndex        =   2
      Top             =   2160
      Width           =   2055
   End
   Begin VB.TextBox Text2 
      Height          =   735
      Left            =   3360
      TabIndex        =   1
      Top             =   960
      Width           =   2175
   End
   Begin VB.TextBox Text1 
      Height          =   735
      Left            =   960
      TabIndex        =   0
      Top             =   960
      Width           =   2055
   End
   Begin VB.Label 借书 
      Caption         =   "图书馆借书系统"
      Height          =   615
      Left            =   960
      TabIndex        =   4
      Top             =   120
      Width           =   4455
   End
   Begin VB.Menu QUERY 
      Caption         =   "图书查询"
   End
   Begin VB.Menu COUNT 
      Caption         =   "统计借书情况"
   End
   Begin VB.Menu SET 
      Caption         =   "管理员设置"
   End
End
Attribute VB_Name = "Libads"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim ADORS1 As New ADODB.Recordset
Dim ADORS2 As New ADODB.Recordset
Private Sub Command1_Click()
Dim STR1 As String    '要执行的SQL语句
Dim STR2 As String

STR1 = Text1.Text
STR2 = Text2.Text

r = 1
If Not ADORS1.BOF Then
    ADORS1.MoveFirst
    While Not ADORS1.EOF And r = 1
        If Trim(ADORS1.Fields("door_no").Value) = Trim(Text1.Text) Then
            r = 0
        Else
            ADORS1.MoveNext
        End If
    Wend
    If r = 1 Then
         MsgBox "无此用户"
    Exit Sub
    End If
Else
    MsgBox "无此用户"
    Exit Sub
End If
        
        
r = 1
If Not ADORS2.BOF Then
    ADORS2.MoveFirst
    While Not ADORS2.EOF And r = 1
        If Trim(ADORS2.Fields("isbn").Value) = Trim(Text2.Text) Then
            r = 0
        Else
            ADORS2.MoveNext
        End If
    Wend
    If r = 1 Then
         MsgBox "无此书"
    Exit Sub
    End If
Else
    MsgBox "无此书"
    Exit Sub
End If

  
With adoRs
   .ActiveConnection = Nothing
   .AddNew
   .Fields("door_no") = Text1.Text
   .Fields("isbn") = Text2.Text
   .Fields("return_books") = "60"
   .ActiveConnection = Aconnection
   .Update
End With

MsgBox "借书成功"




End Sub

Private Sub Command2_Click()
Bianmu.Show
End Sub

Private Sub Form_Load()


Dim str As String
Dim STR1 As String    '要执行的SQL语句
Dim STR2 As String

STR1 = "select door_no from student_books "
ADORS1.Open STR1, Aconnection, adOpenKeyset, adLockOptimistic

STR2 = "select isbn from library_books "
ADORS2.Open STR2, Aconnection, adOpenKeyset, adLockOptimistic


  str = "select * from borrower_books"
ExecSql (str)
End Sub

Private Sub SET_Click()
Form1.Show
End Sub