frmlogin.frm

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VERSION 5.00
Begin VB.Form frmLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "请登录"
   ClientHeight    =   3105
   ClientLeft      =   2835
   ClientTop       =   3480
   ClientWidth     =   5655
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   1834.536
   ScaleMode       =   0  'User
   ScaleWidth      =   5309.739
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin VB.Frame FraLogin 
      Caption         =   "登录"
      Height          =   1575
      Left            =   240
      TabIndex        =   1
      Top             =   1200
      Width           =   5175
      Begin VB.TextBox txtPwd 
         Height          =   345
         IMEMode         =   3  'DISABLE
         Left            =   1440
         PasswordChar    =   "*"
         TabIndex        =   5
         Top             =   840
         Width           =   1830
      End
      Begin VB.CommandButton cmdCancel 
         Cancel          =   -1  'True
         Caption         =   "取消"
         Height          =   375
         Left            =   3480
         TabIndex        =   4
         Top             =   840
         Width           =   1140
      End
      Begin VB.CommandButton cmdOK 
         Caption         =   "确定"
         Default         =   -1  'True
         Height          =   375
         Left            =   3480
         TabIndex        =   3
         Top             =   360
         Width           =   1140
      End
      Begin VB.TextBox txtUser 
         Height          =   345
         Left            =   1425
         TabIndex        =   2
         Top             =   360
         Width           =   1830
      End
      Begin VB.Label lblLabels 
         Caption         =   "密  码(&P):"
         Height          =   270
         Index           =   1
         Left            =   360
         TabIndex        =   7
         Top             =   960
         Width           =   960
      End
      Begin VB.Label lblLabels 
         Caption         =   "用户名(&U):"
         Height          =   270
         Index           =   0
         Left            =   360
         TabIndex        =   6
         Top             =   480
         Width           =   1080
      End
   End
   Begin VB.Frame FraUser 
      Caption         =   "选择身份"
      Height          =   615
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   5175
      Begin VB.OptionButton OptUserType 
         Caption         =   "学生"
         Height          =   255
         Index           =   1
         Left            =   2880
         TabIndex        =   9
         Top             =   240
         Width           =   975
      End
      Begin VB.OptionButton OptUserType 
         Caption         =   "教师"
         Height          =   255
         Index           =   0
         Left            =   1320
         TabIndex        =   8
         Top             =   240
         Width           =   975
      End
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim mnUserType As Integer
Dim micount As Integer
Private Sub cmdcancel_Click()
Unload Me
End Sub
Private Sub cmdOK_Click()
Dim mrc As ADODB.Recordset
Dim usertxtsql As String
Dim usermsgtext As String

If Trim(txtUser.Text = "") Then
   MsgBox "请输入用户名！", vbOKOnly + vbExclamation, "警告"
   txtUser.SetFocus
   Exit Sub
Else
   '根据不同的身份登录
    Select Case mnUserType
        Case 0:
        usertxtsql = "select * from user_info where  User_ID='" & txtUser.Text & "' and User_TYPE='" & OptUserType(0).Caption & "'"
        Case 1:
        usertxtsql = "select * from user_info where  User_ID='" & txtUser.Text & "' and User_TYPE='" & OptUserType(1).Caption & "'"
    End Select
        Set mrc = ExecuteSql(usertxtsql, usermsgtext)
    If mrc.EOF = True Then
      MsgBox "没有这个用户，请重新输入用户名！", vbOKOnly + vbExclamation, "警告"
      txtUser.SetFocus
      Exit Sub
    Else
      If Trim(txtPwd.Text = "") Then
        MsgBox "请输入密码！", vbOKOnly + vbExclamation, "警告"
        txtPwd.SetFocus
        Exit Sub
      Else
        usertxtsql = usertxtsql & "select * from user_info where user_PW='" & Trim(txtPwd.Text) & " '"
        Set mrc = ExecuteSql(usertxtsql, usermsgtext)
        If Trim(mrc.Fields(2)) = Trim(txtPwd.Text) Then
            mrc.Close
            Me.Hide
          Else
            micount = micount + 1
             If micount >= 3 Then
             MsgBox "输入密码3次不正确，你无权进入系统！", vbOKOnly + vbExclamation, "警告"
              Me.Hide
             Else
               MsgBox "输入密码不正确，请重新输入！", vbOKOnly + vbExclamation, "警告"
               txtPwd.SetFocus
               txtPwd.Text = ""
             End If
             Exit Sub
        End If
     End If
   End If
End If
sys_info.Show
End Sub
Private Sub form_load()
micount = 0
OptUserType(0).Value = True
link
End Sub

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