frmdataenv.frm

采用最新的XP类模块

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Begin VB.Form frmLogin 
   BackColor       =   &H80000009&
   BorderStyle     =   0  'None
   Caption         =   "登录"
   ClientHeight    =   3825
   ClientLeft      =   0
   ClientTop       =   -105
   ClientWidth     =   6840
   Icon            =   "frmDataEnv.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3825
   ScaleWidth      =   6840
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin MSAdodcLib.Adodc Adodc1 
      Height          =   375
      Left            =   2160
      Top             =   3360
      Visible         =   0   'False
      Width           =   2415
      _ExtentX        =   4260
      _ExtentY        =   661
      ConnectMode     =   0
      CursorLocation  =   3
      IsolationLevel  =   -1
      ConnectionTimeout=   15
      CommandTimeout  =   30
      CursorType      =   3
      LockType        =   3
      CommandType     =   1
      CursorOptions   =   0
      CacheSize       =   50
      MaxRecords      =   0
      BOFAction       =   0
      EOFAction       =   0
      ConnectStringType=   1
      Appearance      =   1
      BackColor       =   -2147483643
      ForeColor       =   -2147483640
      Orientation     =   0
      Enabled         =   -1
      Connect         =   "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=drilling.mdb;Persist Security Info=False"
      OLEDBString     =   "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=drilling.mdb;Persist Security Info=False"
      OLEDBFile       =   ""
      DataSourceName  =   ""
      OtherAttributes =   ""
      UserName        =   ""
      Password        =   ""
      RecordSource    =   "select * from admin "
      Caption         =   "Adodc1"
      BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
         Name            =   "宋体"
         Size            =   9
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      _Version        =   393216
   End
   Begin VB.Frame frmLogin 
      BackColor       =   &H00E0E0E0&
      Caption         =   "登录"
      Height          =   1455
      Left            =   1200
      TabIndex        =   7
      Top             =   1800
      Width           =   4335
      Begin VB.TextBox txtUser 
         DataSource      =   "Adodc1"
         Height          =   345
         Left            =   1080
         TabIndex        =   3
         Top             =   360
         Width           =   1485
      End
      Begin VB.TextBox txtPwd 
         DataSource      =   "Adodc1"
         Height          =   345
         IMEMode         =   3  'DISABLE
         Left            =   1080
         PasswordChar    =   "*"
         TabIndex        =   4
         Top             =   885
         Width           =   1485
      End
      Begin VB.CommandButton cmdOK 
         Caption         =   "确定"
         Default         =   -1  'True
         Height          =   390
         Left            =   2880
         TabIndex        =   5
         Top             =   360
         Width           =   900
      End
      Begin VB.CommandButton cmdCancel 
         Cancel          =   -1  'True
         Caption         =   "取消"
         Height          =   390
         Left            =   2880
         TabIndex        =   6
         Top             =   840
         Width           =   900
      End
      Begin VB.Label lblLabels 
         AutoSize        =   -1  'True
         BackColor       =   &H00E0E0E0&
         Caption         =   "口令："
         Height          =   195
         Index           =   1
         Left            =   540
         TabIndex        =   9
         Top             =   915
         Width           =   540
      End
      Begin VB.Label lblLabels 
         AutoSize        =   -1  'True
         BackColor       =   &H00E0E0E0&
         Caption         =   "用户名："
         Height          =   195
         Index           =   0
         Left            =   360
         TabIndex        =   8
         Top             =   390
         Width           =   720
      End
   End
   Begin VB.Frame fraUser 
      BackColor       =   &H00E0E0E0&
      Caption         =   "选择身份"
      Height          =   735
      Left            =   1200
      TabIndex        =   0
      Top             =   960
      Width           =   4335
      Begin VB.OptionButton optUserType 
         BackColor       =   &H00E0E0E0&
         Caption         =   "管理员"
         Height          =   375
         Index           =   0
         Left            =   360
         TabIndex        =   1
         Top             =   240
         Width           =   1455
      End
      Begin VB.OptionButton optUserType 
         BackColor       =   &H00E0E0E0&
         Caption         =   "学生"
         Height          =   375
         Index           =   1
         Left            =   2760
         TabIndex        =   2
         Top             =   240
         Width           =   1095
      End
   End
   Begin VB.Label Label1 
      BackStyle       =   0  'Transparent
      Height          =   495
      Left            =   6240
      TabIndex        =   10
      Top             =   0
      Width           =   615
   End
   Begin VB.Image Image1 
      Height          =   3855
      Index           =   1
      Left            =   0
      Picture         =   "frmDataEnv.frx":F84A
      Stretch         =   -1  'True
      Top             =   0
      Width           =   6855
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

'表示当前用户登录所选择的身份，即用户类型, 0-表示管理员；1-表示学生
Dim mnUserType As Integer

Private Sub cmdCancel_Click()
    Unload Me
End Sub

Private Sub cmdOK_Click()
    '取得用户输入的用户名和密码
    Dim user As String, pwd As String
    user = txtUser
    pwd = txtPwd
        
    '根据不同的身份，选择不同的表用以查询
    Dim r As New ADODB.Recordset
    Set r = Adodc1.Recordset
    Dim strSQL As String
    Select Case mnUserType
        Case 0: '若身份为管理员
            strSQL = "select * from admin where name='" & user & "' and pwd='" & pwd & "'"
        Case 1: '若身份为学生
            strSQL = "select * from admin where name='" & user & "' and pwd='" & pwd & "'"
    End Select
    
    On Error Resume Next
    '查询adodc1的状态，如果已经打开，则先关闭
    If r.State = adStateOpen Then r.Close
    r.Open strSQL       '根据strSQL的内容刷新adodc1
       
    '用户密码错误的次数，如果错误次数超过3次，则退出系统
    Static nTryCount As Integer
    
    If r.EOF Then   '登录失败
      MsgBox "对不起，无此用户或者密码不正确！请重新输入！！", vbCritical, "错误"
      txtUser.Text = ""
      txtPwd.Text = ""
      txtUser.SetFocus
      txtUser.SelStart = 0
      txtUser.SelLength = Len(txtUser)
      nTryCount = nTryCount + 1
      If nTryCount >= 3 Then
         MsgBox "您无权操作本系统!再见！", vbCritical, "无权限"
         Unload Me
      End If
    Else            '登陆成功
      '显示frmmain窗体, 并将用户类型和用户名传到frmmain窗体中的mnUserType, msUserName中
      Load frmmain
      With frmmain
        .mnUserType = mnUserType
        .msUserName = pwd
        .Show
      End With
      loginname = cg1.Fields(0)
      Unload Me
    End If
End Sub

Private Sub Form_Load()
optUserType(0).Value = True
End Sub

Private Sub Label1_Click()
End
End Sub

Private Sub optUserType_Click(Index As Integer)
mnUserType = Index
End Sub