frmlogin.frm

很好的学习资料可供参考有实例从图书馆着的希望有帮祝

VERSION 5.00
Begin VB.Form frmLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录“图书借阅系统”"
   ClientHeight    =   1485
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   4230
   Icon            =   "frmLogin.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   1485
   ScaleWidth      =   4230
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   WhatsThisButton =   -1  'True
   WhatsThisHelp   =   -1  'True
   Begin VB.CommandButton cmdEditPass 
      Cancel          =   -1  'True
      Caption         =   "修改密码"
      Height          =   360
      Left            =   2925
      TabIndex        =   4
      Tag             =   "取消"
      Top             =   945
      Width           =   1140
   End
   Begin VB.TextBox txtAdminID 
      Height          =   300
      Left            =   960
      MaxLength       =   10
      TabIndex        =   0
      Top             =   120
      Width           =   3135
   End
   Begin VB.CommandButton cmdCancel 
      Caption         =   "取消"
      Height          =   360
      Left            =   1680
      TabIndex        =   3
      Tag             =   "取消"
      Top             =   960
      Width           =   1140
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   360
      Left            =   420
      TabIndex        =   2
      Tag             =   "确定"
      Top             =   960
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   270
      IMEMode         =   3  'DISABLE
      Left            =   960
      MaxLength       =   10
      PasswordChar    =   "*"
      TabIndex        =   1
      Top             =   480
      Width           =   3135
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      Caption         =   "登录密码:"
      Height          =   180
      Index           =   1
      Left            =   105
      TabIndex        =   5
      Tag             =   "密码(&P)："
      Top             =   540
      Width           =   810
   End
   Begin VB.Label lblLabels 
      AutoSize        =   -1  'True
      Caption         =   "管理员ID:"
      Height          =   180
      Index           =   0
      Left            =   105
      TabIndex        =   6
      Tag             =   "用户名称(&U)："
      Top             =   150
      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
Public gblnOK As Boolean
Private Sub cmdCancel_Click()
    gblnOK = False
    Hide
End Sub

Private Sub cmdEditPass_Click()
    Dim newForm As New frmEditPassword
    If newForm.checkPassword(Trim(txtAdminID), Trim(txtPassword)) <> 1 Then
        MsgBox "该管理员身份或密码验证无效！", vbInformation
        Set newForm = Nothing
        Exit Sub
    End If
    
    newForm.lblAccreditID = Trim(txtAdminID)
    newForm.txtOldPassword = Trim(txtPassword)
    newForm.txtOldPassword.Enabled = False
    newForm.txtNewPassword.Enabled = True
    newForm.cmdOK.Enabled = True
    newForm.Show vbModal
    Set newForm = Nothing
End Sub

Private Sub cmdOK_Click()
    Dim strAdminID As String, strPassword As String
    Dim rs As ADODB.Recordset
    strAdminID = Trim(txtAdminID)
    strPassword = Trim(txtPassword)
    Set rs = mCdt.rsSystemEnter(strAdminID, strPassword)
    '验证用户
    If rs.EOF Then
        MsgBox "登录失败！", vbInformation
        txtAdminID.SetFocus
        txtAdminID.SelStart = 0
        txtAdminID.SelLength = Len(txtAdminID.Text)
    Else
        gbytAccredit = rs("权限")
        gstrAdminID = strAdminID
        gblnOK = True
        Hide
    End If
    
    rs.Close
    Set rs = Nothing    '释放对象
End Sub