frmtypeedit.frm

vb与access数据库的操作实例

VERSION 5.00
Begin VB.Form FrmTypeEdit 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "编辑分类信息"
   ClientHeight    =   3195
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton Cmd_Cancel 
      Cancel          =   -1  'True
      Caption         =   "取 消"
      Height          =   400
      Left            =   2493
      MousePointer    =   99  'Custom
      Style           =   1  'Graphical
      TabIndex        =   3
      Top             =   2640
      Width           =   1300
   End
   Begin VB.CommandButton Cmd_Ok 
      Caption         =   "确 定"
      Height          =   400
      Left            =   888
      MousePointer    =   99  'Custom
      Style           =   1  'Graphical
      TabIndex        =   2
      Top             =   2640
      Width           =   1300
   End
   Begin VB.Frame Frame1 
      BackColor       =   &H80000004&
      Height          =   2295
      Left            =   240
      TabIndex        =   4
      Top             =   120
      Width           =   4215
      Begin VB.TextBox txtDescribe 
         Height          =   855
         Left            =   1080
         MultiLine       =   -1  'True
         ScrollBars      =   2  'Vertical
         TabIndex        =   1
         Top             =   1320
         Width           =   2895
      End
      Begin VB.TextBox txtType 
         Height          =   270
         Left            =   1080
         MaxLength       =   20
         TabIndex        =   0
         Top             =   795
         Width           =   2895
      End
      Begin VB.Label Label3 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFC0C0&
         BackStyle       =   0  'Transparent
         Caption         =   "具体描述"
         Height          =   180
         Left            =   120
         TabIndex        =   8
         Top             =   1320
         Width           =   720
      End
      Begin VB.Label lblTypeId 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFC0C0&
         BackStyle       =   0  'Transparent
         Caption         =   "lblTypeId"
         Height          =   180
         Left            =   1080
         TabIndex        =   7
         Top             =   360
         Width           =   810
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFC0C0&
         BackStyle       =   0  'Transparent
         Caption         =   "所属分类"
         Height          =   180
         Left            =   120
         TabIndex        =   6
         Top             =   360
         Width           =   720
      End
      Begin VB.Label Label2 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFC0C0&
         BackStyle       =   0  'Transparent
         Caption         =   "分类名称"
         Height          =   180
         Left            =   120
         TabIndex        =   5
         Top             =   840
         Width           =   720
      End
   End
End
Attribute VB_Name = "FrmTypeEdit"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public Modify As Boolean
Public nTid As Integer    '种类编号 1-汽车；2-保险
Public nId As Integer     '分类编号
Public sTName As String   '旧的分类名称

Private Sub Cmd_OK_Click()
  '检查用户录入数据的有效性
  If Trim(txtType) = "" Then
    MsgBox "请输入分类名称"
    Exit Sub
  End If
  '将新输入的数据保存到类变量中
  With MyType
    .TypeName = MakeStr(txtType)
    .Description = MakeStr(txtDescribe)
    .TypeId = nTid
    '根据变量Modify决定是插入新数据，还是修改已有的数据
    If Modify = False Then '插入
      '调用In_DB()函数判断用户输入的名称是否已经存在
      If .In_DB(.TypeName, nTid) = True Then
        MsgBox Trim(txtType) + " 已经存在"
        Exit Sub
      End If
      .Insert
    Else '修改
      If Trim(sTName) <> MakeStr(txtType) Then  '如果新类型名称和原来的不相同
        '判断数据库中是否已经存在此新类型名称
        If .In_DB(Trim(txtType), nTid) = True Then
          MsgBox Trim(txtType) + " 已经存在"
          Exit Sub
        End If
      End If
      .Update (nId) '当修改记录时，不能改变TypeId
    End If
  End With
  '刷新分类设置窗口
  FrmType.Adodc1.RecordSource = "SELECT * FROM Types WHERE TypeId=" + Trim(nTid)
  FrmType.Adodc1.Refresh
  FrmType.DataList1.ReFill
  '关闭窗口
  Unload Me
End Sub

Private Sub Cmd_Cancel_Click()
  Unload Me
End Sub