frmclassinfo.frm

该压缩包包含有很多关于数据库原理与应用的课件以及课程设计

VERSION 5.00
Begin VB.Form frmClassInfo 
   Caption         =   "班级信息"
   ClientHeight    =   4515
   ClientLeft      =   120
   ClientTop       =   420
   ClientWidth     =   9750
   LinkTopic       =   "Form2"
   MDIChild        =   -1  'True
   ScaleHeight     =   4515
   ScaleWidth      =   9750
   WindowState     =   2  'Maximized
   Begin VB.CommandButton cmdLast 
      BackColor       =   &H00FFFFFF&
      Caption         =   "最后一条"
      Height          =   495
      Left            =   8520
      TabIndex        =   11
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdNext 
      BackColor       =   &H00FFFFFF&
      Caption         =   "下一条"
      Height          =   495
      Left            =   7320
      TabIndex        =   10
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdPrevious 
      BackColor       =   &H00FFFFFF&
      Caption         =   "上一条"
      Height          =   495
      Left            =   6120
      TabIndex        =   9
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdFirst 
      BackColor       =   &H00FFFFFF&
      Caption         =   "第一条"
      Height          =   495
      Left            =   4920
      TabIndex        =   8
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdCancel 
      BackColor       =   &H00FFFFFF&
      Caption         =   "取消"
      Height          =   495
      Left            =   3720
      TabIndex        =   7
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdSave 
      BackColor       =   &H00FFFFFF&
      Caption         =   "保存"
      Height          =   495
      Left            =   2520
      TabIndex        =   6
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdDel 
      BackColor       =   &H00FFFFFF&
      Caption         =   "删除"
      Height          =   495
      Left            =   1320
      TabIndex        =   5
      Top             =   2880
      Width           =   1095
   End
   Begin VB.CommandButton cmdAddNew 
      BackColor       =   &H00FFFFFF&
      Caption         =   "添加"
      Height          =   495
      Left            =   120
      TabIndex        =   4
      Top             =   2880
      Width           =   1095
   End
   Begin VB.TextBox txtClassName 
      Height          =   495
      Left            =   2280
      TabIndex        =   3
      Text            =   "Text2"
      Top             =   1470
      Width           =   2055
   End
   Begin VB.TextBox txtClassId 
      Height          =   495
      Left            =   2280
      TabIndex        =   1
      Text            =   "Text1"
      Top             =   630
      Width           =   2055
   End
   Begin VB.Label Label2 
      Caption         =   "班级名称"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   600
      TabIndex        =   2
      Top             =   1440
      Width           =   1335
   End
   Begin VB.Label Label1 
      Caption         =   "班级编号"
      BeginProperty Font 
         Name            =   "微软雅黑"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   600
      TabIndex        =   0
      Top             =   720
      Width           =   1575
   End
End
Attribute VB_Name = "frmClassInfo"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub cmdAddNew_Click()
On Error Resume Next
Call clear
Dim i As Integer
Dim max As Integer
max = 0
addnewflag = True
cmdAddNew.Enabled = False
'使班级编号递增排列
For i = 0 To rsClassInfo.RecordCount
    If max < rsClassInfo(0) Then
        max = rsClassInfo(0)
    End If
    rsClassInfo.MoveNext
Next i
rsClassInfo.MoveFirst

cmdCancel.Enabled = True
cmdDel.Enabled = False
cmdFirst.Enabled = False
cmdLast.Enabled = False
cmdPrevious.Enabled = False
cmdNext.Enabled = False

rsClassInfo.AddNew
txtClassId.Text = max + 1
txtClassName.SetFocus

End Sub

Private Sub cmdDel_Click()
On Error Resume Next
If MsgBox("Are you sure to delete record", vbOKCancel + vbExclamation, "Deleting record") = vbOK Then
    rsClassInfo.Delete
    rsClassInfo.MoveNext
    If rsClassInfo.EOF Then
        rsClassInfo.MoveLast
        MsgBox "Last record"
    End If
    Call display
End If
End Sub

Private Sub cmdSave_Click()
On Error Resume Next
If txtClassId.Text = "" Or txtClassName.Text = "" Then
    MsgBox "Improper save!Data entry missing", vbCritical, "Fill up all fields"
    txtClassId.SetFocus
    Exit Sub
End If
Call assign
rsClassInfo.save
MsgBox "Record saved", vbInformation, "Record is saved"

cmdDel.Enabled = True
cmdFirst.Enabled = True
cmdLast.Enabled = True
cmdPrevious.Enabled = True
cmdNext.Enabled = True
cmdAddNew.Enabled = True
cmdCancel.Enabled = False
Exit Sub
End Sub