frmlogin.frm

VB+sql实现区域环境管理信息系统的部分功能

VERSION 5.00
Object = "{67397AA1-7FB1-11D0-B148-00A0C922E820}#6.0#0"; "MSADODC.OCX"
Begin VB.Form FrmLogin 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "身份验证"
   ClientHeight    =   2580
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   4800
   ControlBox      =   0   'False
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2580
   ScaleWidth      =   4800
   StartUpPosition =   2  '屏幕中心
   Begin MSAdodcLib.Adodc Adodc1 
      Height          =   375
      Left            =   240
      Top             =   1680
      Visible         =   0   'False
      Width           =   1695
      _ExtentX        =   2990
      _ExtentY        =   661
      ConnectMode     =   0
      CursorLocation  =   3
      IsolationLevel  =   -1
      ConnectionTimeout=   15
      CommandTimeout  =   30
      CursorType      =   3
      LockType        =   3
      CommandType     =   2
      CursorOptions   =   0
      CacheSize       =   50
      MaxRecords      =   0
      BOFAction       =   0
      EOFAction       =   0
      ConnectStringType=   2
      Appearance      =   1
      BackColor       =   -2147483643
      ForeColor       =   -2147483640
      Orientation     =   0
      Enabled         =   -1
      Connect         =   "FILE NAME=D:\EMSystem\database\login.dsn;1"
      OLEDBString     =   ""
      OLEDBFile       =   "D:\EMSystem\database\login.dsn"
      DataSourceName  =   ""
      OtherAttributes =   "1"
      UserName        =   ""
      Password        =   ""
      RecordSource    =   "users"
      Caption         =   "Adodc1"
      BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
         Name            =   "宋体"
         Size            =   9
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      _Version        =   393216
   End
   Begin VB.CommandButton Command2 
      Caption         =   "取消"
      Height          =   495
      Left            =   2640
      TabIndex        =   6
      Top             =   1920
      Width           =   1455
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定"
      Height          =   495
      Left            =   720
      TabIndex        =   5
      Top             =   1920
      Width           =   1455
   End
   Begin VB.TextBox Text2 
      Height          =   375
      IMEMode         =   3  'DISABLE
      Left            =   1560
      PasswordChar    =   "*"
      TabIndex        =   4
      Top             =   1080
      Width           =   2295
   End
   Begin VB.Frame Frame1 
      Height          =   1575
      Left            =   480
      TabIndex        =   0
      Top             =   120
      Width           =   3855
      Begin VB.TextBox Text1 
         Height          =   375
         Left            =   1080
         TabIndex        =   3
         Top             =   360
         Width           =   2295
      End
      Begin VB.Label Label2 
         Caption         =   "密  码"
         Height          =   375
         Left            =   360
         TabIndex        =   2
         Top             =   1080
         Width           =   735
      End
      Begin VB.Label Label1 
         Caption         =   "用户名"
         Height          =   375
         Left            =   360
         TabIndex        =   1
         Top             =   480
         Width           =   975
      End
   End
End
Attribute VB_Name = "FrmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False



Private Sub Command1_Click()
  Dim strusername As String
Dim strpassword As String
Static intlogintimes As Integer


If Trim(Text1.Text) = "" Then
 MsgBox "用户名不能为空！", vbOKOnly + vbExclamation, ""
 Text1.SetFocus
 Exit Sub
End If
Adodc1.Refresh
   Adodc1.Recordset.Find "username='" & Text1.Text & " '", , adSearchForward, 1
   If Not Adodc1.Recordset.EOF Then
     strusername = Adodc1.Recordset!UserName
     strpassword = Adodc1.Recordset!userpwd
   Else
     strusername = ""
     strpassword = ""
   End If
      If strusername = Text1.Text And strpassword = Text2.Text Then
        
        Adodc1.Recordset.Close
        Unload Me
        FrmMain.Show
        Else
     MsgBox "用户名或密码不对！", vbOKOnly + vbExclamation, "提示"
     
     
     intlogintimes = intlogintimes + 1
       If intlogintimes >= 3 Then
         MsgBox "您已经三次尝试进入本系统，均不成功，系统将关闭。"
         Adodc1.Recordset.Close
         End
       End If
       Text2.SetFocus
       SendKeys "{Home}+{End}"
    End If
  
End Sub



Private Sub Command2_Click()
Unload Me
End Sub