frmlogin.frm

学生信息管理系统

VERSION 5.00
Begin VB.Form frmLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   2940
   ClientLeft      =   30
   ClientTop       =   330
   ClientWidth     =   5100
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2940
   ScaleWidth      =   5100
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Tag             =   "Login"
   Begin VB.CommandButton cmdCancel 
      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            =   2790
      TabIndex        =   4
      Tag             =   "Cancel"
      Top             =   2220
      Width           =   1140
   End
   Begin VB.CommandButton cmdOK 
      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            =   1170
      TabIndex        =   3
      Tag             =   "OK"
      Top             =   2220
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   405
      IMEMode         =   3  'DISABLE
      Left            =   1788
      PasswordChar    =   "*"
      TabIndex        =   2
      Top             =   1488
      Width           =   2325
   End
   Begin VB.TextBox txtUserName 
      Height          =   405
      Left            =   1788
      TabIndex        =   1
      Top             =   975
      Width           =   2325
   End
   Begin VB.Label Label1 
      Alignment       =   2  'Center
      Caption         =   "学生信息管理系统"
      BeginProperty Font 
         Name            =   "隶书"
         Size            =   23.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H80000002&
      Height          =   615
      Left            =   563
      TabIndex        =   6
      Top             =   240
      Width           =   3975
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      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          =   210
      Index           =   1
      Left            =   600
      TabIndex        =   0
      Top             =   1585
      Width           =   900
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      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          =   210
      Index           =   0
      Left            =   585
      TabIndex        =   5
      Tag             =   "&User Name:"
      Top             =   1065
      Width           =   915
   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
    'ToDo: create test for correct password
    'check for correct password
    
    UserName = ""
    If Trim(txtUserName.Text) = "" Then
        MsgBox "用户名为空，请重新输入用户名！", vbOKOnly + vbExclamation, "警告"
        txtUserName.SetFocus
    Else
        txtSQL = "select * from user_Info where user_ID = '" & Trim(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)
            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
    End If
    Exit Sub
End Sub