form1.frm

采用VB+ACCESS编写的汽车销售管理系统,

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "登录"
   ClientHeight    =   2865
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   3795
   LinkTopic       =   "Form1"
   ScaleHeight     =   2865
   ScaleWidth      =   3795
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command2 
      Caption         =   "取消"
      Height          =   495
      Left            =   2280
      TabIndex        =   5
      Top             =   1920
      Width           =   975
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   495
      Left            =   600
      TabIndex        =   2
      Top             =   1920
      Width           =   1095
   End
   Begin VB.TextBox txtpwd 
      Height          =   375
      IMEMode         =   3  'DISABLE
      Left            =   1440
      PasswordChar    =   "*"
      TabIndex        =   1
      Top             =   1200
      Width           =   1335
   End
   Begin VB.TextBox txtuser 
      Height          =   375
      Left            =   1440
      TabIndex        =   0
      Top             =   360
      Width           =   1335
   End
   Begin VB.Label Label2 
      Caption         =   "密码"
      Height          =   375
      Left            =   600
      TabIndex        =   4
      Top             =   1200
      Width           =   855
   End
   Begin VB.Label Label1 
      Caption         =   "用户名"
      Height          =   375
      Left            =   600
      TabIndex        =   3
      Top             =   360
      Width           =   735
   End
End
Attribute VB_Name = "Form1"
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=carshale.mdb"
conn.Open connectionstring
cnt = 0
End Sub