frmlogin.frm

售楼管理系统,含系统源程序和数据库.功能齐全,界面美观,操作方便.

VERSION 5.00
Begin VB.Form frmLogin 
   BackColor       =   &H00C0FFFF&
   BorderStyle     =   1  'Fixed Single
   Caption         =   "登录"
   ClientHeight    =   2535
   ClientLeft      =   45
   ClientTop       =   435
   ClientWidth     =   4485
   Icon            =   "frmLogin.frx":0000
   LinkTopic       =   "Form16"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2535
   ScaleWidth      =   4485
   StartUpPosition =   2  '屏幕中心
   Begin VB.ComboBox cmbName 
      Height          =   300
      Left            =   1680
      TabIndex        =   5
      Top             =   480
      Width           =   2175
   End
   Begin VB.CommandButton cmdCancel 
      Cancel          =   -1  'True
      Caption         =   "取  消"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   2400
      TabIndex        =   4
      Top             =   1920
      Width           =   975
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确  定"
      Default         =   -1  'True
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   10.5
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   1200
      TabIndex        =   3
      Top             =   1920
      Width           =   975
   End
   Begin VB.TextBox txtPwd 
      Height          =   375
      IMEMode         =   3  'DISABLE
      Left            =   1680
      PasswordChar    =   "*"
      TabIndex        =   0
      Top             =   1200
      Width           =   2175
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      BackColor       =   &H00C0FFFF&
      Caption         =   "密  码："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00C000C0&
      Height          =   360
      Left            =   600
      TabIndex        =   2
      Top             =   1320
      Width           =   1035
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackColor       =   &H00C0FFFF&
      Caption         =   "用户名："
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   12
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00C000C0&
      Height          =   360
      Left            =   600
      TabIndex        =   1
      Top             =   480
      Width           =   1020
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim cnt As Integer                     '记录输入次数
Dim sql As String
Dim rs_login As New ADODB.Recordset

Private Sub cmdcancel_Click()
    conn.Close       '关闭数据库连接
    Set conn = Nothing
    Unload Me
End Sub

Private Sub cmdok_Click()
    If Trim(cmbName.Text) = "" Then            '判断输入的用户名是否为空
        MsgBox "没有这个用户", vbOKOnly + vbExclamation
        cmbName.SetFocus
    Else                                    '判断用户名和密码是否正确
        sql = "select * from 系统管理表 where czyh='" & cmbName.Text & "'"
        rs_login.Open sql, conn, adOpenKeyset, adLockPessimistic
        If rs_login.EOF = True Then
            MsgBox "没有这个用户", vbOKOnly + vbExclamation, ""
            cmbName.SetFocus
        Else                                  '检验密码是否正确
            If Trim(rs_login.Fields(1)) = Trim(txtPwd.Text) Then
                userID = cmbName.Text
                username = rs_login.Fields(2)   '记录登录用户的类型，以便权限设置
                Unload Me
                frmmain.Show
                rs_login.Close
                Exit Sub
            Else
                MsgBox "密码不正确", vbOKOnly + vbExclamation, ""
                txtPwd.SetFocus
            End If
        End If
    End If
    cnt = cnt + 1               '输入次数加1
    If cnt = 3 Then
        MsgBox "您输入密码错误次数太多！", vbExclamation, ""
        Unload Me
    End If
    rs_login.Close
End Sub

Private Sub Form_Load()
    '定义连接字符串
    connectionstring = "provider=Microsoft.Jet.oledb.4.0;" & _
                       "data source= " & App.Path & "\House.mdb"
    conn.Open connectionstring         '打开数据库
    sql = "select * from 系统管理表 "     '检索系统管理表
    rs_login.Open sql, conn, adOpenKeyset, adLockPessimistic  '打开记录集
    If rs_login.EOF = False Then        '有记录时逐一添加到cmbName组合框
        Do While rs_login.EOF = False
            cmbName.AddItem (rs_login.Fields(0))
            rs_login.MoveNext
        Loop
        cmbName.ListIndex = 0           '默认显示第一个子项
    End If
    rs_login.Close
    cnt = 0                          '初始化输入次数
End Sub