删除旧书.frm

这是一个书店售书管理系统

VERSION 5.00
Begin VB.Form form6 
   Caption         =   "Form2"
   ClientHeight    =   4545
   ClientLeft      =   60
   ClientTop       =   390
   ClientWidth     =   5880
   LinkTopic       =   "Form2"
   ScaleHeight     =   4545
   ScaleWidth      =   5880
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text2 
      Height          =   495
      Left            =   1800
      TabIndex        =   6
      Top             =   1800
      Width           =   2295
   End
   Begin VB.CommandButton Command2 
      Caption         =   "取消"
      Height          =   495
      Left            =   3360
      TabIndex        =   3
      Top             =   3480
      Width           =   1095
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   495
      Left            =   1560
      TabIndex        =   2
      Top             =   3480
      Width           =   1095
   End
   Begin VB.TextBox Text1 
      Height          =   615
      Left            =   1680
      TabIndex        =   1
      Top             =   840
      Width           =   2895
   End
   Begin VB.Label Label3 
      Caption         =   "数量"
      Height          =   495
      Left            =   480
      TabIndex        =   5
      Top             =   1920
      Width           =   1095
   End
   Begin VB.Label Label2 
      Caption         =   "删除书库的某些图书"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H000000C0&
      Height          =   495
      Left            =   360
      TabIndex        =   4
      Top             =   120
      Width           =   4455
   End
   Begin VB.Label Label1 
      Caption         =   "输入书号"
      Height          =   615
      Left            =   480
      TabIndex        =   0
      Top             =   840
      Width           =   1575
   End
End
Attribute VB_Name = "form6"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Dim note As New ADODB.Recordset

Private Sub Command1_Click()
Dim sql As String
Dim answer As Integer
sql = "select * from  书库表 where 书号='" & Trim(Text1.Text) & "'"
note.Open sql, cnn, 3, 2
If note.BOF And note.EOF Then
   MsgBox ("无此记录！")
   note.Close
   Text1.Text = ""
Else
    answer = MsgBox("你确定要删除此类图书吗？", vbYesNo, "提示")
If answer = vbYes Then
 If note.Fields("数量").Value = 0 Then
   note.Delete
   note.Close
   Text1.Text = ""
 ElseIf note.Fields("数量").Value = Val(Text2.Text) Then
   note.Delete
   note.Close
   Text1.Text = ""
   MsgBox "此图书已全部删除！"
 ElseIf note.Fields("数量").Value > Val(Text2.Text) Then
   note.Fields("数量").Value = note.Fields("数量").Value - Val(Text2.Text)
   note.Update
   note.Close
   Text1.Text = ""
 
  
   MsgBox "此图书已删掉" + Text2.Text
 Else
   MsgBox "此类图书没有这么多，请重新输入数量！"
   note.Close
   Text1.Text = ""
   Text2.Text = ""
End If
End If
End If
End Sub

Private Sub Command2_Click()
Unload Me
End Sub