login.frm

vb仓库管理系统 不是很复杂的

VERSION 5.00
Begin VB.Form login 
   BackColor       =   &H00FFFFC0&
   Caption         =   "登录仓库管理系统"
   ClientHeight    =   3450
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4935
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   ScaleHeight     =   3450
   ScaleWidth      =   4935
   StartUpPosition =   2  '屏幕中心
   Begin VB.Frame Frame1 
      BackColor       =   &H00FFFFC0&
      Caption         =   "登录"
      Height          =   1815
      Left            =   600
      TabIndex        =   5
      Top             =   240
      Width           =   3495
      Begin VB.TextBox txtuser 
         Height          =   285
         Left            =   1200
         TabIndex        =   7
         Top             =   480
         Width           =   1575
      End
      Begin VB.TextBox txtpwd 
         Height          =   285
         IMEMode         =   3  'DISABLE
         Left            =   1200
         PasswordChar    =   "*"
         TabIndex        =   6
         Top             =   1080
         Width           =   1575
      End
      Begin VB.Label Label1 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFFFC0&
         Caption         =   "用户名"
         Height          =   195
         Left            =   360
         TabIndex        =   9
         Top             =   480
         Width           =   540
      End
      Begin VB.Label Label2 
         AutoSize        =   -1  'True
         BackColor       =   &H00FFFFC0&
         Caption         =   "密 码"
         Height          =   180
         Left            =   360
         TabIndex        =   8
         Top             =   1080
         Width           =   450
      End
   End
   Begin VB.Timer Timer1 
      Interval        =   100
      Left            =   240
      Top             =   2880
   End
   Begin VB.PictureBox Adodc1 
      BackColor       =   &H80000005&
      ForeColor       =   &H80000008&
      Height          =   330
      Left            =   1560
      ScaleHeight     =   270
      ScaleWidth      =   1395
      TabIndex        =   2
      Top             =   2520
      Visible         =   0   'False
      Width           =   1455
   End
   Begin VB.CommandButton Command2 
      Caption         =   "取消"
      Height          =   375
      Left            =   2760
      TabIndex        =   1
      Top             =   2160
      Width           =   1095
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   375
      Left            =   720
      TabIndex        =   0
      Top             =   2160
      Width           =   1095
   End
   Begin VB.Line Line1 
      X1              =   0
      X2              =   4920
      Y1              =   2880
      Y2              =   2880
   End
   Begin VB.Label Label4 
      BackColor       =   &H00FFFFC0&
      Height          =   375
      Left            =   2760
      TabIndex        =   4
      Top             =   3000
      Width           =   975
   End
   Begin VB.Label Label3 
      BackColor       =   &H00FFFFC0&
      Height          =   375
      Left            =   3840
      TabIndex        =   3
      Top             =   3000
      Width           =   855
   End
End
Attribute VB_Name = "login"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim cnt As Integer                     '记录确定次数

Private Sub Command1_Click()
Dim sql As String
Dim rs_login As New ADODB.Recordset
If Trim(txtuser.Text) = "" Then            '判断输入的用户名是否为空
   MsgBox "没有这个用户", vbOKOnly + vbExclamation, ""
   txtuser.SetFocus
Else
   sql = "select * from 系统管理 where 用户名='" & txtuser.Text & "'"
   rs_login.Open sql, conn, adOpenKeyset, adLockPessimistic
   If rs_login.EOF = True Then
      MsgBox "没有这个用户", vbOKOnly + vbExclamation, ""
      txtuser.SetFocus
   Else                                  '检验密码是否正确
      If Trim(rs_login.Fields(1)) = Trim(txtpwd.Text) Then
          userID = txtuser.Text
          userpow = rs_login.Fields(2)
          rs_login.Close
          Unload Me
          MDIForm1.Show
      Else
         MsgBox "密码不正确", vbOKOnly + vbExclamation, ""
         txtpwd.SetFocus
      End If
   End If
End If
cnt = cnt + 1
If cnt = 3 Then
   Unload Me
End If
Exit Sub
End Sub

Private Sub Command2_Click()
Unload Me
End Sub

Private Sub Form_Load()
Dim connectionstring As String
connectionstring = "provider=Microsoft.Jet.oledb.4.0;" & _
                   "data source=cangku.mdb"
conn.Open connectionstring
cnt = 0

End Sub



Private Sub Timer1_Timer()
Label3.Caption = Time
Label4.Caption = Date
End Sub