frmlogin.frm

本论文设计的是航空公司管理信息系统

VERSION 5.00
Begin VB.Form frmLogin 
   BackColor       =   &H00FFC0C0&
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   3225
   ClientLeft      =   30
   ClientTop       =   330
   ClientWidth     =   5100
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3225
   ScaleWidth      =   5100
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Tag             =   "Login"
   Begin VB.CommandButton cmdCancel 
      BackColor       =   &H00FFFFFF&
      Cancel          =   -1  'True
      Caption         =   "取消"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   360
      Left            =   3000
      TabIndex        =   4
      Tag             =   "Cancel"
      Top             =   2280
      Width           =   1140
   End
   Begin VB.CommandButton cmdOK 
      BackColor       =   &H00FFFFFF&
      Caption         =   "确定"
      Default         =   -1  'True
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   360
      Left            =   840
      TabIndex        =   3
      Tag             =   "OK"
      Top             =   2280
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   288
      IMEMode         =   3  'DISABLE
      Left            =   1788
      PasswordChar    =   "*"
      TabIndex        =   2
      Top             =   1488
      Width           =   2325
   End
   Begin VB.TextBox txtUserName 
      Height          =   288
      Left            =   1800
      TabIndex        =   1
      Top             =   1080
      Width           =   2325
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackColor       =   &H00FFC0C0&
      Caption         =   "航空信息管理系统"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   22.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00000000&
      Height          =   450
      Left            =   600
      TabIndex        =   6
      Top             =   240
      Width           =   3720
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H00FFC0C0&
      Caption         =   "用户密码"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Index           =   1
      Left            =   600
      TabIndex        =   0
      Top             =   1500
      Width           =   1080
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H00FFC0C0&
      Caption         =   "用户名"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   252
      Index           =   0
      Left            =   720
      TabIndex        =   5
      Tag             =   "&User Name:"
      Top             =   1116
      Width           =   840
   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 Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpbuffer As String, nSize As Long) As Long


Public OK As Boolean
'记录确定次数
Dim miCount As Integer
Private Sub Form_Load()
    Dim sBuffer As String
    Dim lSize As Long


    sBuffer = Space$(255)
    lSize = Len(sBuffer)
    Call GetUserName(sBuffer, lSize)
    If lSize > 0 Then
        txtUserName.Text = ""
   
    Else
        txtUserName.Text = vbNullString
    End If
    

    OK = False
    miCount = 0
End Sub



Private Sub cmdCancel_Click()
    OK = False
    Me.Hide
End Sub


Private Sub cmdOK_Click()
    Dim txtSQL As String
    Dim mrc As ADODB.Recordset
    Dim MsgText As String
    Dim username As String
    
    'ToDo: create test for correct password
    'check for correct password
    
    username = ""
    If Trim(txtUserName.Text = "") Then
        MsgBox "没有这个用户，请重新输入用户名！", vbOKOnly + vbExclamation, "警告"
        txtUserName.SetFocus
    Else
        txtSQL = "select * from user_Info where 用户名称 = '" & txtUserName.Text & "'"
        Set mrc = ExecuteSQL(txtSQL, MsgText)
        If mrc.EOF = True Then
            MsgBox "没有这个用户，请重新输入用户名!", vbOKOnly + vbExclamation, "警告"
            txtUserName.SetFocus
        Else
            If Trim(mrc.Fields(1)) = Trim(txtPassword.Text) Then
                OK = True
                mrc.Close
                Me.Hide
                username = Trim(txtUserName.Text)
                'frmMain.Show
            Else
                MsgBox "输入密码不正确，请重新输入！", vbOKOnly + vbExclamation, "警告"
                txtPassword.SetFocus
                txtPassword.Text = ""
            End If
        End If
    End If
    
    miCount = miCount + 1
    If miCount = 3 Then
        Me.Hide
        'frmMain.Show
    End If
    Exit Sub
    
End Sub