frmlogin.frm

酒店收费系统

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Begin VB.Form frmLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   1545
   ClientLeft      =   2835
   ClientTop       =   3480
   ClientWidth     =   3750
   Icon            =   "frmLogin.frx":0000
   LinkTopic       =   "Form1"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   103
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   250
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin MSAdodcLib.Adodc adoUsers 
      Height          =   390
      Left            =   2055
      Top             =   270
      Visible         =   0   'False
      Width           =   1500
      _ExtentX        =   2646
      _ExtentY        =   688
      ConnectMode     =   0
      CursorLocation  =   3
      IsolationLevel  =   -1
      ConnectionTimeout=   15
      CommandTimeout  =   30
      CursorType      =   3
      LockType        =   3
      CommandType     =   8
      CursorOptions   =   0
      CacheSize       =   50
      MaxRecords      =   0
      BOFAction       =   0
      EOFAction       =   0
      ConnectStringType=   1
      Appearance      =   1
      BackColor       =   -2147483643
      ForeColor       =   -2147483640
      Orientation     =   0
      Enabled         =   -1
      Connect         =   ""
      OLEDBString     =   ""
      OLEDBFile       =   ""
      DataSourceName  =   ""
      OtherAttributes =   ""
      UserName        =   ""
      Password        =   ""
      RecordSource    =   ""
      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.TextBox txtUserName 
      Height          =   300
      Left            =   1350
      TabIndex        =   1
      Text            =   "Admin"
      Top             =   135
      Width           =   2250
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   375
      Left            =   495
      TabIndex        =   4
      Top             =   1020
      Width           =   1140
   End
   Begin VB.CommandButton cmdCancel 
      Cancel          =   -1  'True
      Caption         =   "取消"
      Height          =   375
      Left            =   2100
      TabIndex        =   5
      Top             =   1020
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   300
      IMEMode         =   3  'DISABLE
      Left            =   1350
      PasswordChar    =   "*"
      TabIndex        =   3
      Text            =   "nove"
      Top             =   525
      Width           =   2250
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      Caption         =   "用户名称(&U)："
      Height          =   180
      Index           =   0
      Left            =   150
      TabIndex        =   0
      Top             =   180
      Width           =   1170
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      Caption         =   "密码(&P)："
      Height          =   180
      Index           =   1
      Left            =   510
      TabIndex        =   2
      Top             =   570
      Width           =   810
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub cmdCancel_Click()
    '结束程序
    End
End Sub

Private Sub cmdOk_Click()
Dim strUserName As String
Dim strPassword As String
Static intLoginTimes As Integer

    If Trim(txtUserName.Text) = "" Then '如果用户名为空
        MsgBox "用户名不能为空！", vbOKOnly + vbCritical, "错误"
        txtUserName.SetFocus
        Exit Sub
    End If
    '打开数据库中的 Users 表
    adoUsers.Refresh
    '查找用户名
    adoUsers.Recordset.Find "Name='" & txtUserName.Text & "'", , adSearchForward, 1
    '也可以用下面的过滤方式
    'adoUser.Recordset.Filter = "Name='" & txtUserName.Text & "'"
    
    If Not adoUsers.Recordset.EOF Then '找到记录
        strUserName = adoUsers.Recordset!Name
        strPassword = adoUsers.Recordset!Password
    Else '没找到记录
        strUserName = ""
        strPassword = ""
    End If
    
    If strUserName = txtUserName.Text And strPassword = txtPassword.Text Then
        adoUsers.Recordset.Close '关闭数据库中的 Users 表
        Unload Me '关闭窗体
        frmMDI.Show '显示主窗体
    Else
        '用户名或密码不对
        MsgBox "用户名或密码不对！", vbOKOnly + vbInformation, "提示"
        intLoginTimes = intLoginTimes + 1
        If intLoginTimes >= 3 Then '超过三次
            adoUsers.Recordset.Close '关闭数据库中的 Users 表
            End '退出整个程序
        End If
        txtPassword.SetFocus '重新输入密码
        SendKeys "{HOME}+{END}"
    End If
End Sub

Private Sub Form_Load()
    '打开用户表
    OpenTable adoUsers, "Users"
End Sub