frmlogin.frm

这是一个数据库做出来的火车站售票系统程序

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Begin VB.Form frmLogin 
   BackColor       =   &H00FFC0FF&
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   2745
   ClientLeft      =   2835
   ClientTop       =   3480
   ClientWidth     =   5775
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   1621.837
   ScaleMode       =   0  'User
   ScaleWidth      =   5422.414
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin MSAdodcLib.Adodc Adodc1 
      Height          =   735
      Left            =   2160
      Top             =   360
      Visible         =   0   'False
      Width           =   1455
      _ExtentX        =   2566
      _ExtentY        =   1296
      ConnectMode     =   0
      CursorLocation  =   3
      IsolationLevel  =   -1
      ConnectionTimeout=   15
      CommandTimeout  =   30
      CursorType      =   3
      LockType        =   3
      CommandType     =   2
      CursorOptions   =   0
      CacheSize       =   50
      MaxRecords      =   0
      BOFAction       =   0
      EOFAction       =   0
      ConnectStringType=   3
      Appearance      =   1
      BackColor       =   -2147483643
      ForeColor       =   -2147483640
      Orientation     =   0
      Enabled         =   -1
      Connect         =   "DSN=cheliang"
      OLEDBString     =   ""
      OLEDBFile       =   ""
      DataSourceName  =   "cheliang"
      OtherAttributes =   ""
      UserName        =   ""
      Password        =   ""
      RecordSource    =   "用户管理"
      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 
      DataSource      =   "Adodc1"
      Height          =   345
      Left            =   1200
      TabIndex        =   1
      Top             =   1200
      Width           =   2325
   End
   Begin VB.CommandButton cmdOK 
      BackColor       =   &H00FFFFFF&
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   390
      Left            =   480
      TabIndex        =   4
      Top             =   2280
      Width           =   1140
   End
   Begin VB.CommandButton cmdCancel 
      Cancel          =   -1  'True
      Caption         =   "取消"
      Height          =   390
      Left            =   2160
      TabIndex        =   5
      Top             =   2280
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   345
      IMEMode         =   3  'DISABLE
      Left            =   1200
      PasswordChar    =   "*"
      TabIndex        =   3
      Top             =   1800
      Width           =   2325
   End
   Begin VB.Image Image1 
      Height          =   2715
      Left            =   3720
      Picture         =   "frmLogin.frx":0000
      Top             =   0
      Width           =   2055
   End
   Begin VB.Label Label1 
      BackColor       =   &H0000C000&
      Caption         =   "欢迎登陆使用"
      BeginProperty Font 
         Name            =   "Arial Black"
         Size            =   21.75
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H000000FF&
      Height          =   615
      Left            =   120
      TabIndex        =   6
      Top             =   240
      Width           =   3375
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H00FFC0FF&
      Caption         =   "用户名称(&U):"
      Height          =   270
      Index           =   0
      Left            =   0
      TabIndex        =   0
      Top             =   1200
      Width           =   1080
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H00FFC0FF&
      Caption         =   "密码(&P):"
      Height          =   270
      Index           =   1
      Left            =   0
      TabIndex        =   2
      Top             =   1800
      Width           =   1080
   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 i As Integer
Public str1 As String
Public str2 As String
Public rs1 As New ADODB.Recordset
Public com As New ADODB.Command
Public LoginSucceeded As Boolean

Private Sub cmdCancel_Click()
    '设置全局变量为 false
    '不提示失败的登录
    LoginSucceeded = False
    Unload Me
End Sub

Private Sub cmdOK_Click()
    '检查正确的密码
   Call open_db
   If txtUserName.Text = Empty Then
      MsgBox "用户名不能为空", vbCritical, vbOKOnly
      Call close_db
      Exit Sub
   End If
   Set rs1 = New ADODB.Recordset
   str1 = "Select * From 用户管理 where 用户名='" & txtUserName.Text & "'and 用户密码='" & txtPassword.Text & "'"
   rs1.Open str1, adocon, , adLockPessimistic
   If (rs1.EOF = True And rs1.BOF = True) Then
         MsgBox "您输入的信息有误，请重新输入！", , "系统提示"
        txtUserName.Text = ""
        txtPassword.Text = ""
        Call close_db
        i = i + 1
        If i = 3 Then
            MsgBox "对不起，您已无权使用本系统!", , "系统提示"
            Unload Me
        End If
    Else
         frmMain.Show
         rs1.Close
         Call close_db
         Unload Me
    End If
End Sub

Private Sub Form_Load()
    txtUserName.Text = Empty
End Sub