studentlogin.frm

用java编写的学生信息管理系统

VERSION 5.00
Begin VB.Form StudentLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   2565
   ClientLeft      =   2835
   ClientTop       =   3480
   ClientWidth     =   5085
   Icon            =   "StudentLogin.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   Picture         =   "StudentLogin.frx":0442
   ScaleHeight     =   1515.487
   ScaleMode       =   0  'User
   ScaleWidth      =   4774.54
   ShowInTaskbar   =   0   'False
   StartUpPosition =   2  '屏幕中心
   Begin VB.TextBox txtUserName 
      Height          =   345
      Left            =   2115
      TabIndex        =   1
      Top             =   975
      Width           =   2325
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   390
      Left            =   1320
      TabIndex        =   4
      Top             =   2040
      Width           =   1140
   End
   Begin VB.CommandButton cmdCancel 
      Cancel          =   -1  'True
      Caption         =   "取消"
      Height          =   390
      Left            =   2760
      TabIndex        =   5
      Top             =   2040
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   345
      IMEMode         =   3  'DISABLE
      Left            =   2115
      PasswordChar    =   "*"
      TabIndex        =   3
      Top             =   1365
      Width           =   2325
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H80000009&
      Caption         =   "用户名称(&U):"
      Height          =   270
      Index           =   0
      Left            =   930
      TabIndex        =   0
      Top             =   990
      Width           =   1080
   End
   Begin VB.Label lblLabels 
      BackColor       =   &H80000009&
      Caption         =   "密码(&P):"
      Height          =   270
      Index           =   1
      Left            =   930
      TabIndex        =   2
      Top             =   1380
      Width           =   1080
   End
End
Attribute VB_Name = "StudentLogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim i As Integer

Public LoginSucceeded As Boolean

Private Sub cmdCancel_Click()
    '设置全局变量为 false
    '不提示失败的登录
    LoginSucceeded = False
    Me.Hide
    StudentManger.Show
End Sub

Private Sub cmdOK_Click()
i = i + 1
If i > 3 Then
MsgBox "你输入错误已经超过三次，将取消登录资格", , "警告！"
Unload Me
Unload StudentManger
Exit Sub

End If
    '检查正确的密码
    IsClassHead = False
    ACCESSconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\Student.mdb" & ";Persist Security Info=False;Jet OLEDB:Database password=psite"
SQLconn = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=student;Data Source=."
    Dim filename As String

filename = App.Path & "/psite.psite"
Dim Lstr As String
Open filename For Input As #1

        Line Input #1, Lstr
Close #1
If Not Lstr <> "1" Then
conn = True
Else
conn = False
End If

     Dim mrc As ADODB.Recordset
    Dim msgtext As String
    Dim txtsql As String
   
'On Error GoTo a


   
'sql防注入函数

 If check(Trim(txtUserName.Text)) = True And check(Trim(txtPassword.Text)) = True Then
 
 If txtUserName = "1" And txtPassword = "1" Then
       '权限代码
       StudentManger.Login.Enabled = False
       StudentManger.LoginOut.Enabled = True
'StudentManger.DataBaseConn.Enabled = False

StudentManger.DataSystemFirst.Enabled = True


StudentManger.DataBaseManger.Enabled = True
StudentManger.InfoManger.Enabled = True
StudentManger.InfoSelect.Enabled = True
        LoginTo.Show
        Unload Me
        Exit Sub
   End If
  
txtsql = "select * from usertable where UserName='" & Trim(txtUserName.Text) & "'"
Set mrc = ExecuteSQL(txtsql, msgtext)
If Not mrc.EOF <> True Then
  MsgBox " 用户名错误！", vbExclamation + vbOKOnly, "警告"
  txtUserName.SetFocus
  txtUserName.SelStart = 0
  txtUserName.SelLength = Len(txtUserName.Text)
  Exit Sub
End If
txtsql = "select UserType,ClassName from usertable where UserPWD='" & Trim(txtPassword.Text) & "'"
Set mrc = ExecuteSQL(txtsql, msgtext)
If Not mrc.EOF <> True Then
  MsgBox " 密码错误！", vbExclamation + vbOKOnly, "警告"
  txtPassword.SetFocus
  txtPassword.SelStart = 0
  txtPassword.SelLength = Len(txtPassword.Text)
  Exit Sub
End If
 txtsql = "select UserType,ClassName,UserName from userTable where UserName='" & Trim(txtUserName.Text) & "' and UserPWD='" & Trim(txtPassword.Text) & "'"
Set mrc = ExecuteSQL(txtsql, msgtext)
If Not mrc.EOF <> True Then
  MsgBox "用户名称和密码不匹配！", vbExclamation + vbOKOnly, "警告"
  Exit Sub
End If
  
If mrc.Fields(0) = "2" Then
MsgBox "你现在登录的身份是系主任：" & mrc.Fields(2) & " 的身份", vbExclamation + vbOKOnly, "提示"
'权限代码
studentSelectTXT = ""
StudentManger.Login.Enabled = False
       StudentManger.LoginOut.Enabled = True
'StudentManger.DataBaseConn.Enabled = False

StudentManger.DataSystemFirst.Enabled = True
StudentManger.PasswordChange.Enabled = True


StudentManger.DataBaseManger.Enabled = True
StudentManger.InfoManger.Enabled = True
StudentManger.InfoSelect.Enabled = True
StudentManger.Toolbar1.Enabled = True
StudentManger.Toolbar1.Visible = True
End If

If mrc.Fields(0) = "0" Then
MsgBox "你现在登录的身份是以同学：" & mrc.Fields(2) & " 的身份", vbExclamation + vbOKOnly, "提示"
'权限代码
StudentManger.Login.Enabled = False
       StudentManger.LoginOut.Enabled = True
       StudentManger.PasswordChange.Enabled = True
      ' UserManage.SSTab1.TabVisible(1) = False
'StudentManger.DataBaseConn.Enabled = False

'StudentManger.DataSystemFirst.Enabled = True

StudentManger.Toolbar1.Enabled = True
StudentManger.Toolbar1.Visible = True
'StudentManger.DataBaseManger.Enabled = True
'StudentManger.InfoManger.Enabled = True
StudentManger.InfoSelect.Enabled = True
End If
If mrc.Fields(0) = "1" Then
MsgBox "你现在登录的身份是：" & mrc.Fields(1) & "班主任：" & mrc.Fields(2) & " 的身份", vbExclamation + vbOKOnly, "提示"
studentSelectTXT = " where ClassName ='" & mrc.Fields(1) & "'"
resultSelectTXT = ",ClassTable,StudentTable where SelectCourseTable.studentID = studentTable.studentID and StudentTable.ClassName = ClassTable.ClassName and ClassTable.ClassName = '" & mrc.Fields(1) & "'"
resultselect2TXT = " and StudentTable.ClassName='" & mrc.Fields(1) & "'"
IsClassHead = True
'权限代码
StudentManger.Login.Enabled = False
       StudentManger.LoginOut.Enabled = True
'StudentManger.DataBaseConn.Enabled = False
StudentManger.Toolbar1.Enabled = True
StudentManger.Toolbar1.Visible = True
'StudentManger.DataSystemFirst.Enabled = True
StudentManger.PasswordChange.Enabled = True
StudentManger.ClassManger.Enabled = False
'StudentManger.DataBaseManger.Enabled = True
StudentManger.InfoManger.Enabled = True
StudentManger.用户管理.Enabled = False
StudentManger.CourseSet.Enabled = False
StudentManger.InfoSelect.Enabled = True
End If
sysusername = Trim(txtUserName.Text)
sysuserPWD = Trim(txtPassword.Text)
        
'a:
' MsgBox "错误！！！", vbExclamation + vbExclamation, "错误"
 
LoginTo.Show
StudentManger.Login.Enabled = False
StudentManger.LoginOut.Enabled = True
  Unload Me
End If
End Sub





Private Sub Form_Load()
i = 0
End Sub