frmlogin.frm

shujuku数据库用vb边的数据库是一个比较简单的数据可撒酒风开绿灯寄生蜂

VERSION 5.00
Begin VB.Form frmLogin 
   Caption         =   "登录"
   ClientHeight    =   4605
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   7740
   LinkTopic       =   "Form1"
   ScaleHeight     =   4605
   ScaleWidth      =   7740
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton cmdCancel 
      Caption         =   "取消"
      Height          =   375
      Left            =   3720
      TabIndex        =   6
      Top             =   2880
      Width           =   1215
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确定"
      Height          =   375
      Left            =   1320
      TabIndex        =   5
      Top             =   2880
      Width           =   1215
   End
   Begin VB.TextBox txtPassword 
      Height          =   495
      IMEMode         =   3  'DISABLE
      Left            =   2640
      PasswordChar    =   "*"
      TabIndex        =   4
      Top             =   2040
      Width           =   2655
   End
   Begin VB.TextBox txtUsername 
      Height          =   495
      Left            =   2760
      TabIndex        =   3
      Top             =   1320
      Width           =   2655
   End
   Begin VB.Label Label4 
      Alignment       =   1  'Right Justify
      Caption         =   "版本提供：DD Software"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   3600
      TabIndex        =   7
      Top             =   3720
      Width           =   3855
   End
   Begin VB.Label Label3 
      Caption         =   "用户密码"
      Height          =   375
      Left            =   480
      TabIndex        =   2
      Top             =   2160
      Width           =   1455
   End
   Begin VB.Label Label2 
      Caption         =   "用户名"
      Height          =   375
      Left            =   480
      TabIndex        =   1
      Top             =   1320
      Width           =   1455
   End
   Begin VB.Label Label1 
      Alignment       =   2  'Center
      Caption         =   "学生信息管理系统"
      BeginProperty Font 
         Name            =   "楷体_GB2312"
         Size            =   26.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   840
      TabIndex        =   0
      Top             =   240
      Width           =   5775
   End
End
Attribute VB_Name = "frmLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Public OK As Boolean
'判断登陆次数
Dim miCount As Integer
Dim UserName As String


Private Sub cmdCancel_Click()
OK = False
Me.Hide

End Sub

Private Sub cmdOK_Click()

'用来存放SQL语句
Dim txtSQl As String

'用来存放记录集对象
Dim mrc As ADODB.Recordset

'用来存放返回信息
Dim msgtext As String
UserName = ""

'判断用户名是否为空
If Trim(txtUsername = "") Then
    MsgBox "没有这个用户，请重新输入！", vbOKOnly + vbInformation, "警告！"
    txtUsername.SetFocus
Else
    '查寻指定用户名记录
    txtSQl = "select* from user_info where user_id='" & txtUsername.Text & "'"
    
    '执行查询语句
    Set mrc = ExecuteSQL(txtSQl, msgtext)
    
    If mrc.EOF Then
        MsgBox "没有这个用户，请重新输入！", vbOKOnly + vbInformation, "警告！"
        txtUsername.SetFocus
    Else
        '判断密码是否正确
        If Trim(mrc.Fields(1)) = Trim(txtPassword.Text) Then
            OK = True
            mrc.Close
            Me.Hide
            UserName = Trim(txtUsername.Text)
        Else
            MsgBox "密码错误！请重新输入。", vbOKOnly + vbInformation, "系统信息！"
            txtPassword = ""
            txtPassword.SetFocus
        End If
    End If
End If


'记载密码输入次数
miCount = miCount + 1
If miCount > 3 Then
    Me.Hide
End If
Exit Sub
    
    
End Sub

Private Sub form_load()
    OK = False
    miCount = 0
    
End Sub