frmlogin.frm

本系统为汽车销售系统

VERSION 5.00
Begin VB.Form frmlogin 
   Caption         =   "用户登陆"
   ClientHeight    =   3495
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4920
   LinkTopic       =   "Form1"
   ScaleHeight     =   3495
   ScaleWidth      =   4920
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton Command2 
      Caption         =   "取   消"
      Height          =   495
      Left            =   2160
      TabIndex        =   6
      Top             =   2520
      Width           =   1335
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确    定"
      Height          =   495
      Left            =   600
      TabIndex        =   5
      Top             =   2520
      Width           =   1335
   End
   Begin VB.Frame Frame1 
      Height          =   1935
      Left            =   360
      TabIndex        =   0
      Top             =   120
      Width           =   3495
      Begin VB.TextBox txtpwd 
         Height          =   375
         Left            =   960
         TabIndex        =   4
         Text            =   " "
         Top             =   1080
         Width           =   1935
      End
      Begin VB.TextBox txtuser 
         Height          =   375
         Left            =   960
         TabIndex        =   3
         Text            =   " "
         Top             =   480
         Width           =   1935
      End
      Begin VB.Label Label2 
         Caption         =   "密  码"
         Height          =   375
         Left            =   240
         TabIndex        =   2
         Top             =   1200
         Width           =   855
      End
      Begin VB.Label Label1 
         Caption         =   "用户名"
         Height          =   375
         Left            =   240
         TabIndex        =   1
         Top             =   600
         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
Public PasswordKey As String
Public NameKey As String
Public Try_times As Integer



Private Sub Command1_Click()

  Dim j As Single

  '数据有效性检查
  If txtuser = "" Then
    MsgBox "请输入用户名"
    txtuser.SetFocus
    Exit Sub
  End If
  If txtpwd = "" Then
    MsgBox "请输入密码"
    txtpwd.SetFocus
    Exit Sub
  End If
  '将用户输入赋值到变量中
  NameKey = MakeStr(txtuser)
  PasswordKey = MakeStr(txtpwd)
  '判断用户是否存在
  If MyUser.In_DB(NameKey) = False Then
    MsgBox "用户名不存在"
    Try_times = Try_times + 1
    If Try_times >= 3 Then
      MsgBox "您已经三次尝试进入本系统，均不成功，系统将关闭"
      DBapi_Disconnect
      End
    Else
      Exit Sub
    End If
  End If
  '判断密码是否正确
  MyUser.GetInfo (NameKey)
  If MyUser.Pwd <> PasswordKey Then
    MsgBox "密码错误"
    Try_times = Try_times + 1
    If Try_times >= 3 Then
      MsgBox "您已经三次尝试进入本系统，均不成功，系统将关闭"
      DBapi_Disconnect
      End
    Else
      Exit Sub
    End If
  End If
  '登录成功，将当前用户的信息保存在CurUser中
  CurUser.GetInfo (MyUser.UserName)
  '关闭登录对话框
  Unload Me
End Sub


Private Sub Command2_Click()
End
End Sub