frmbooksort.frm

很好的学习资料可供参考有实例从图书馆着的希望有帮祝

VERSION 5.00
Object = "{F0D2F211-CCB0-11D0-A316-00AA00688B10}#1.0#0"; "MSDATLST.OCX"
Begin VB.Form frmBookSort 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "图书分类编目"
   ClientHeight    =   4680
   ClientLeft      =   1125
   ClientTop       =   1740
   ClientWidth     =   6630
   HelpContextID   =   2
   Icon            =   "frmBookSort.frx":0000
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   4680
   ScaleWidth      =   6630
   ShowInTaskbar   =   0   'False
   StartUpPosition =   1  '所有者中心
   WhatsThisButton =   -1  'True
   WhatsThisHelp   =   -1  'True
   Begin VB.Frame Frame1 
      Height          =   4095
      Left            =   120
      TabIndex        =   7
      Top             =   0
      Width           =   6375
      Begin VB.TextBox txtDescribe 
         Height          =   300
         Left            =   2040
         MaxLength       =   10
         TabIndex        =   2
         Top             =   1200
         Width           =   2535
      End
      Begin VB.TextBox txtRemark 
         Height          =   1965
         Left            =   2040
         MaxLength       =   255
         MultiLine       =   -1  'True
         ScrollBars      =   2  'Vertical
         TabIndex        =   3
         Top             =   1920
         Width           =   4095
      End
      Begin VB.CommandButton cmdDel 
         Caption         =   "删除(&D)"
         Height          =   360
         Left            =   4800
         TabIndex        =   5
         Top             =   795
         Width           =   1275
      End
      Begin VB.CommandButton cmdAdd 
         Caption         =   "添加(&A)"
         Height          =   360
         Left            =   4800
         TabIndex        =   4
         Top             =   360
         Width           =   1275
      End
      Begin VB.TextBox txtSort 
         Height          =   300
         IMEMode         =   3  'DISABLE
         Left            =   2040
         MaxLength       =   2
         TabIndex        =   1
         Top             =   480
         Width           =   855
      End
      Begin MSDataListLib.DataList dblSort 
         Height          =   3420
         Left            =   240
         TabIndex        =   0
         Top             =   480
         Width           =   1575
         _ExtentX        =   2778
         _ExtentY        =   6033
         _Version        =   393216
         ListField       =   ""
         BoundColumn     =   ""
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         Caption         =   "主题词:"
         Height          =   180
         Index           =   1
         Left            =   2040
         TabIndex        =   11
         Top             =   960
         Width           =   630
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         Caption         =   "备注:"
         Height          =   180
         Index           =   3
         Left            =   2040
         TabIndex        =   10
         Top             =   1680
         Width           =   450
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         Caption         =   "分类号:"
         Height          =   180
         Index           =   0
         Left            =   2040
         TabIndex        =   9
         Top             =   240
         Width           =   630
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         Caption         =   "图书分类列表:"
         Height          =   180
         Index           =   2
         Left            =   240
         TabIndex        =   8
         Top             =   240
         Width           =   1170
      End
   End
   Begin VB.CommandButton cmdExit 
      Cancel          =   -1  'True
      Caption         =   "关闭"
      Height          =   360
      Left            =   4800
      TabIndex        =   6
      Tag             =   "确定"
      Top             =   4200
      Width           =   1260
   End
End
Attribute VB_Name = "frmBookSort"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim WithEvents rs As ADODB.Recordset
Attribute rs.VB_VarHelpID = -1
Private Sub cmdAdd_Click()
        '追加新记录
        rs.AddNew
        rs("类别代码") = ""
        rs("命名描述") = ""
        rs("说明") = ""
        txtSort.SetFocus
End Sub

Private Sub cmdDel_Click()
    '删除记录
    Dim intBook As Integer
    Dim rsBook As ADODB.Recordset
    Set rsBook = mCdt.rsBookSortStat(rs("类别代码"))
    intBook = rsBook(0)
    rsBook.Close
    
    If intBook > 0 Then
        MsgBox "该图书类别下已有图书,不能被删除!", vbInformation
        Exit Sub
    End If
    
    If Not (rs.EOF Or rs.BOF) Then
        rs.Delete
        rs.MoveNext
    End If
End Sub

Private Sub cmdExit_Click()
    On Error Resume Next
    rs.Update
    Unload Me
End Sub

Private Sub dblSort_Click()
    Dim strSortID As String
    strSortID = dblSort.Text
    rs.MoveFirst
    rs.Find "类别代码='" & strSortID & "'"
End Sub

Private Sub Form_Load()
    Set rs = mCdt.rsBookSortRegister
    Set dblSort.RowSource = rs
    dblSort.ListField = "类别代码"
    Set txtSort.DataSource = rs
    txtSort.DataField = "类别代码"
    Set txtDescribe.DataSource = rs
    txtDescribe.DataField = "命名描述"
    Set txtRemark.DataSource = rs
    txtRemark.DataField = "说明"
End Sub

Private Sub Form_Unload(Cancel As Integer)
    On Error Resume Next
    rs.Close
    Set rs = Nothing
End Sub

Private Sub rs_MoveComplete(ByVal adReason As ADODB.EventReasonEnum, ByVal pError As ADODB.Error, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
    rsRefresh
End Sub

Private Sub txtSort_GotFocus()
    txtSort.SelStart = 0
    txtSort.SelLength = Len(txtSort)
End Sub

Private Sub txtSort_LostFocus()
    '检验数据
    On Error Resume Next
    If Trim(txtSort) = "" Then
        MsgBox "类别代码不能为空字串!", vbExclamation
        txtSort.SetFocus
        Exit Sub
    End If
    rs.Update
    
    Select Case Err
        Case 0
            rsRefresh
        Case -2147467259
            MsgBox Error
            MsgBox "类别代码发生重复冲突!", vbExclamation
            txtSort.SetFocus
        Case Else
            txtSort.SetFocus
    End Select
End Sub

Private Sub rsRefresh()
    If rs.AbsolutePosition < 1 Then
        txtSort.Enabled = False
        txtRemark.Enabled = False
        cmdDel.Enabled = False
    Else
        txtSort.Enabled = True
        txtRemark.Enabled = True
        cmdDel.Enabled = True
    End If
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
    On Error Resume Next
    If rs.BOF Or rs.EOF Then
        Exit Sub
    End If
    
    If (rs.EditMode = adEditAdd Or rs.EditMode = adEditInProgress) Then
        Cancel = 1
    End If
End Sub