pass.frm

简单的数据库系统

VERSION 5.00
Begin VB.Form pass 
   BorderStyle     =   5  'Sizable ToolWindow
   Caption         =   "登录窗口"
   ClientHeight    =   3315
   ClientLeft      =   60
   ClientTop       =   285
   ClientWidth     =   5295
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MDIChild        =   -1  'True
   MinButton       =   0   'False
   ScaleHeight     =   3315
   ScaleWidth      =   5295
   ShowInTaskbar   =   0   'False
   Begin VB.Frame Frame1 
      Height          =   3255
      Index           =   0
      Left            =   120
      TabIndex        =   0
      Top             =   0
      Width           =   5055
      Begin VB.TextBox Text2 
         Height          =   495
         IMEMode         =   3  'DISABLE
         Left            =   2280
         PasswordChar    =   "*"
         TabIndex        =   4
         Top             =   1320
         Width           =   2175
      End
      Begin VB.TextBox Text1 
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   14.25
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   495
         IMEMode         =   3  'DISABLE
         Left            =   2280
         PasswordChar    =   "*"
         TabIndex        =   3
         Top             =   600
         Width           =   2175
      End
      Begin VB.CommandButton Command1 
         Caption         =   "登录系统(&O)"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   14.25
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   615
         Left            =   600
         TabIndex        =   2
         Top             =   2160
         Width           =   1815
      End
      Begin VB.CommandButton Command2 
         Caption         =   "退出系统(&C)"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   14.25
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   615
         Left            =   2640
         TabIndex        =   1
         Top             =   2160
         Width           =   1815
      End
      Begin VB.Label Label1 
         Caption         =   "密    码"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   12
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   375
         Left            =   600
         TabIndex        =   6
         Top             =   1440
         Width           =   1215
      End
      Begin VB.Label Label2 
         Caption         =   "用 户 名"
         BeginProperty Font 
            Name            =   "宋体"
            Size            =   12
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
         Height          =   495
         Left            =   600
         TabIndex        =   5
         Top             =   600
         Width           =   1215
      End
   End
End
Attribute VB_Name = "pass"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
  
  If Text1.Text = "" Then
     MsgBox "请输入用户名！", vbOKOnly, "提示！"
     Text1.SetFocus
  Else
     If Text2.Text = "" Then
        MsgBox "请输入密码！", vbOKOnly, "提示！"
        Text2.SetFocus
     Else
       
       txtSQL = "select * from user where 姓名='" & Text1.Text & "'"   '查询指定用户名的记录
       Set dream = ExecuteSQL(txtSQL, Msgtext) '执行查询语句
       
       If dream.EOF = True Then
          MsgBox "用户不存在，请重新输入用户名！", vbOKOnly + vbExclamation, "提示！"
          Text1.SetFocus
          Text1.Text = ""
       Else
          If Trim(dream.Fields(1)) = Trim(Text2.Text) Then '判断密码是否正确
            OK = True
            studentmdi.Show
            pass.Hide
            login.Hide
            dream.Close
          Else
           studentmdi.Hide
           MsgBox "输入密码不正确，请重新输入！", 48, "警告 "
           Text2.SetFocus
           Text2.Text = ""
          End If
        End If
         c = c + 1   '记载输入密码次数
         If c = 3 Then Me.Hide
         If OK Then Me.Hide
        ' Text1.Text = ""
         Text2.Text = ""
     End If
   End If
End Sub



Private Sub Command2_Click()
Unload Me
End Sub

Private Sub Form_Activate()
Text1.SetFocus
Text1.Text = ""
End Sub


Private Sub Text1_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
   Text2.SetFocus
End If
End Sub

Private Sub Text2_KeyPress(KeyAscii As Integer)
If KeyAscii = 13 Then
     Call Command1_Click
  End If
End Sub