frmlogin.frm

这是我自己做的系统 很不完善 不足之处请多多指教！

VERSION 5.00
Begin VB.Form FrmLogin 
   BorderStyle     =   0  'None
   Caption         =   "身份验证"
   ClientHeight    =   5820
   ClientLeft      =   0
   ClientTop       =   0
   ClientWidth     =   7635
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   5820
   ScaleWidth      =   7635
   ShowInTaskbar   =   0   'False
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Cmdcancel 
      BackColor       =   &H00FFFF80&
      Caption         =   "取消"
      BeginProperty Font 
         Name            =   "隶书"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   3840
      Style           =   1  'Graphical
      TabIndex        =   7
      Top             =   3240
      Width           =   1215
   End
   Begin VB.CommandButton Cmdok 
      BackColor       =   &H00FFFF80&
      Caption         =   "登陆"
      DisabledPicture =   "FrmLogin.frx":0000
      BeginProperty Font 
         Name            =   "隶书"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   960
      MaskColor       =   &H00C0FFC0&
      Style           =   1  'Graphical
      TabIndex        =   6
      Top             =   3240
      Width           =   1215
   End
   Begin VB.Frame Frame1 
      BackColor       =   &H00808000&
      ForeColor       =   &H00808000&
      Height          =   3975
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   5775
      Begin VB.ComboBox Combo1 
         Height          =   300
         ItemData        =   "FrmLogin.frx":BAE8
         Left            =   2280
         List            =   "FrmLogin.frx":BAF2
         TabIndex        =   11
         Text            =   "Combo1"
         Top             =   480
         Width           =   1575
      End
      Begin VB.TextBox txtUsername 
         Height          =   495
         Left            =   2160
         TabIndex        =   9
         Top             =   1200
         Width           =   1815
      End
      Begin VB.PictureBox Picture1 
         Appearance      =   0  'Flat
         BackColor       =   &H008080FF&
         ForeColor       =   &H80000008&
         Height          =   375
         Left            =   1680
         Picture         =   "FrmLogin.frx":BB06
         ScaleHeight     =   345
         ScaleWidth      =   345
         TabIndex        =   5
         Top             =   2520
         Width           =   375
      End
      Begin VB.TextBox txtPassword 
         Height          =   495
         IMEMode         =   3  'DISABLE
         Left            =   2160
         PasswordChar    =   "*"
         TabIndex        =   3
         Top             =   1800
         Width           =   1815
      End
      Begin VB.Label Label5 
         BackColor       =   &H00808000&
         Caption         =   "用户权限"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   12
            Charset         =   134
            Weight          =   700
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H0000FFFF&
         Height          =   495
         Left            =   480
         TabIndex        =   10
         Top             =   480
         Width           =   1215
      End
      Begin VB.Label Label3 
         BackColor       =   &H00808000&
         Caption         =   "请仔细填写！"
         BeginProperty Font 
            Name            =   "隶书"
            Size            =   14.25
            Charset         =   134
            Weight          =   700
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H0000FFFF&
         Height          =   495
         Left            =   2400
         TabIndex        =   4
         Top             =   2520
         Width           =   1935
      End
      Begin VB.Label Label2 
         BackColor       =   &H00808000&
         Caption         =   "密码"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   14.25
            Charset         =   134
            Weight          =   700
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H0000FFFF&
         Height          =   495
         Left            =   600
         TabIndex        =   2
         Top             =   1920
         Width           =   1215
      End
      Begin VB.Label Label1 
         Appearance      =   0  'Flat
         BackColor       =   &H00808000&
         Caption         =   "用户名"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   14.25
            Charset         =   134
            Weight          =   700
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         ForeColor       =   &H0000FFFF&
         Height          =   615
         Left            =   480
         TabIndex        =   1
         Top             =   1200
         Width           =   1095
      End
   End
   Begin VB.Label Label4 
      Caption         =   "Label4"
      Height          =   495
      Left            =   2640
      TabIndex        =   8
      Top             =   2160
      Width           =   1215
   End
End
Attribute VB_Name = "FrmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public loginsucceeded As Boolean

Private Sub Cmdcancel_Click()
Unload Me

End Sub

Private Sub Cmdok_Click()
Dim rs As ADODB.Recordset
Dim conn As ADODB.Connection
Set conn = New ADODB.Connection
conn.ConnectionString = "fileDSN=mawen.dsn"

conn.Open
Set rs = New ADODB.Recordset
If Combo1.Text = "" Or txtUsername.Text = "" Or txtPassword.Text = "" Then
   MsgBox "权限，用户编号，密码都必须填写", vbOKOnly + vbExclamation, "系统警告"
Else
    SQL = "select UserName from Users where   UserName='" & Trim(txtUsername.Text) & "'"
    rs.Open Trim(SQL), conn, adOpenKeyset, adLockPessimistic
    If rs.EOF = True Then
     
     
     
MsgBox "你输入的用户名不存在", vbOKOnly + vbExclamation, "系统警告"
      
     
    txtUsername.Text = ""
     txtPassword.Text = ""
     txtUsername.SetFocus
    Else
        SQL = "select Pwd from Users where UserName='" & Trim(txtUsername.Text) & "' "
        rs.Close
       rs.Open Trim(SQL), conn, adOpenKeyset, adLockPessimistic
        If Trim(rs.Fields(0)) <> Trim(txtPassword.Text) Then
          MsgBox "您输入的密码不正确或用户编号有错误!", vbOKOnly + vbExclamation, "系统提示"
          txtUsername.Text = ""
        txtPassword.Text = ""
           txtUsername.SetFocus
        ElseIf Trim(rs.Fields(0)) = Trim(txtPassword.Text) Then
         
       conn.Close
        Set conn = Nothing
        Set rs = Nothing
        'User = Trim(txtUsername.Text)
       ' quanxian = Trim(Combo1.Text)
         Unload Me
         
         MDIForm1.Show
        End If
    End If
End If


End Sub

Private Sub Form_Load()
loginsucceeded = False
End Sub