frmlogin.frm

用VB开发的一个学生管理系统

VERSION 5.00
Begin VB.Form Frmlogin 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "身份验证"
   ClientHeight    =   3120
   ClientLeft      =   45
   ClientTop       =   405
   ClientWidth     =   4680
   ControlBox      =   0   'False
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3120
   ScaleWidth      =   4680
   StartUpPosition =   2  '屏幕中心
   Begin VB.Data Data1 
      Caption         =   "Data1"
      Connect         =   "Access"
      DatabaseName    =   ""
      DefaultCursorType=   0  '缺省游标
      DefaultType     =   2  '使用 ODBC
      Exclusive       =   0   'False
      Height          =   375
      Left            =   1320
      Options         =   0
      ReadOnly        =   0   'False
      RecordsetType   =   1  'Dynaset
      RecordSource    =   ""
      Top             =   0
      Visible         =   0   'False
      Width           =   2295
   End
   Begin VB.Frame Frame1 
      Height          =   2055
      Left            =   480
      TabIndex        =   2
      Top             =   240
      Width           =   3855
      Begin VB.ComboBox txtUser 
         DataSource      =   "Data1"
         Height          =   300
         Left            =   1440
         TabIndex        =   6
         Top             =   360
         Width           =   1815
      End
      Begin VB.TextBox txtPwd 
         Height          =   495
         IMEMode         =   3  'DISABLE
         Left            =   1440
         PasswordChar    =   "*"
         TabIndex        =   5
         Top             =   1200
         Width           =   1815
      End
      Begin VB.Label Label2 
         Caption         =   "密码："
         Height          =   495
         Left            =   240
         TabIndex        =   4
         Top             =   1200
         Width           =   855
      End
      Begin VB.Label Label1 
         Caption         =   "用户名："
         Height          =   495
         Left            =   360
         TabIndex        =   3
         Top             =   360
         Width           =   975
      End
   End
   Begin VB.CommandButton Cmd_Cancel 
      Caption         =   "取消"
      Height          =   495
      Left            =   2520
      TabIndex        =   1
      Top             =   2400
      Width           =   1215
   End
   Begin VB.CommandButton Cmd_OK 
      Caption         =   "确定"
      Height          =   495
      Left            =   840
      TabIndex        =   0
      Top             =   2400
      Width           =   1215
   End
End
Attribute VB_Name = "Frmlogin"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public Try_times As Integer

Private Sub cmd_cancel_Click()
Unload Me
End Sub

Private Sub cmd_OK_Click()

Dim mystr As String
Dim response As String
Dim response1 As String

If txtUser.Text = "" Or txtPwd.Text = "" Then
   response1 = MsgBox("请将用户名和密码填写完整！", vbExclamation, "警告")
   'Call txtUser_Click
   Exit Sub
End If

Data1.Recordset.MoveFirst
Data1.Refresh
Do While Not Data1.Recordset.EOF
If Trim(Data1.Recordset.Fields("UserName")) = Trim(txtUser.Text) Then

  If Trim(Data1.Recordset.Fields("UserPwd")) = Trim(txtPwd.Text) Then
  Unload Me
  ' MsgBox "连接成功", 0 + 48, "提示"
  FrmMain.Show
  Load FrmMain
  Exit Sub
  
   'Mainfrm.Show
  ' Load safrm
   'safrm.Show
  Else
     response = MsgBox("密码错误！", vbExclamation, "警告")
     txtPwd.Text = ""
     txtPwd.SetFocus
     Exit Sub
 End If

 Else
        Data1.Recordset.MoveNext
End If
'MsgBox "无此用户", 0 + 48, "警告"
Loop
response1 = MsgBox("无此用户！", vbExclamation, "警告")
txtUser.Text = ""
txtPwd.Text = ""
txtUser.SetFocus

End Sub
Private Sub Form_Load()

Dim dbname As String
Dim sql As String
dbname = App.Path
If Right$(dbname, 1) <> "\" Then dbname = dbname & "\"
dbname = dbname & "student_MG.mdb"
Data1.DatabaseName = dbname
sql = "select * from " & "Users"
Data1.RecordSource = sql
connStr = "provider=microsoft.Jet.OLEDB.4.0;Data Source=" + App.Path + "\student_MG.mdb;"
inituser
'txtUser.Text = ""
'Data1.Refresh
'Data1.Recordset.MoveFirst
'Data1.Recordset.Edit

End Sub


'Private Sub txtUser_Click()
'Set txtUser.Container = Frame1
'txtUser.SetFocus
'End Sub
Private Sub txtPwd_click()
'Set txtPwd.Container = Frame1
txtPwd.SetFocus
End Sub

Private Sub txtPwd_KeyPress(KeyAscii As Integer)
If KeyAscii = Asc(vbCr) Then
   KeyAscii = 0
   Call cmd_OK_Click
End If
End Sub
Sub inituser()
Dim rstuser As ADODB.Recordset
sqlStr = "select UserName from Users"
Set rstuser = executesql(sqlStr, msgText)
txtUser.Clear
If Not rstuser.EOF Then
Do While Not rstuser.EOF
    txtUser.AddItem Trim(rstuser.Fields(0))
    rstuser.MoveNext
Loop
txtUser.ListIndex = 0
Else
MsgBox "不存在用户", vbOKOnly + vbExclamation, "警告"
Exit Sub
End If
rstuser.Close

End Sub