frmlogin.frm

来自「简单的数据哭访问程序」· FRM 代码 · 共 121 行

VERSION 5.00
Begin VB.Form frmLogin 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "登录"
   ClientHeight    =   1545
   ClientLeft      =   4230
   ClientTop       =   4215
   ClientWidth     =   3750
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   912.837
   ScaleMode       =   0  'User
   ScaleWidth      =   3521.047
   ShowInTaskbar   =   0   'False
   Begin VB.TextBox txtUserName 
      Height          =   345
      Left            =   1290
      TabIndex        =   1
      Top             =   135
      Width           =   2325
   End
   Begin VB.CommandButton cmdOK 
      Caption         =   "确定"
      Default         =   -1  'True
      Height          =   390
      Left            =   480
      TabIndex        =   4
      Top             =   1020
      Width           =   1140
   End
   Begin VB.CommandButton cmdCancel 
      Cancel          =   -1  'True
      Caption         =   "取消"
      Height          =   390
      Left            =   2100
      TabIndex        =   5
      Top             =   1020
      Width           =   1140
   End
   Begin VB.TextBox txtPassword 
      Height          =   345
      IMEMode         =   3  'DISABLE
      Left            =   1290
      PasswordChar    =   "*"
      TabIndex        =   3
      Top             =   525
      Width           =   2325
   End
   Begin VB.Label lblLabels 
      Alignment       =   1  'Right Justify
      Caption         =   "用户名称:"
      Height          =   270
      Index           =   0
      Left            =   105
      TabIndex        =   0
      Top             =   150
      Width           =   1080
   End
   Begin VB.Label lblLabels 
      Alignment       =   1  'Right Justify
      Caption         =   "密码:"
      Height          =   270
      Index           =   1
      Left            =   105
      TabIndex        =   2
      Top             =   540
      Width           =   1080
   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 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
End Sub

Private Sub cmdOK_Click()
    Dim querySQL As String
    querySQL = "SELECT studentname, password FROM student where studentname='" & Trim(txtUserName.Text) & "'"
    If ConnecToServer = True Then
        If QueryData(querySQL) = True Then
            'MsgBox g_DBrs.RecordCount
            If g_DBrs.RecordCount = 0 Then
                MsgBox "不存在这个用户！请重新录入正确的用户名。"
                txtUserName.SetFocus
            Else
                If g_DBrs!password <> Trim(txtPassword.Text) Then
                    MsgBox "无效的密码，请重试!", , "登录"
                    txtPassword.SetFocus
                Else
                    mdiFrmStu.Show
                    mdiFrmStu.StatusBar1.Panels(1).Text = txtUserName.Text & " 你好!!"
                    LoginSucceeded = True
                    Unload Me
                End If
            End If
        End If
    End If
    
End Sub



Private Sub txtUserName_Validate(Cancel As Boolean)
    If txtUserName.Text = Empty Then
            MsgBox "用户名不能为空!", vbInformation
            txtUserName.SetFocus
            Cancel = True
    End If
End Sub