login.txt

经过几个月的设计和开发

Private Sub Form_Load()             '连接用户表
Call open_connection("user_table")
xpcmdbutton1.Caption = "登陆"
xpcmdbutton2.Caption = "注销"
End Sub

Private Sub Image1_Click()

End Sub

Private Sub xpcmdbutton1_Click()     '登录系统
Dim sql As String

If Trim(Text1.Text) = "" Then        '如果文本框为空，则给出提示
  frmMsg.Show
   frmMsg.notice.Visible = True
  frmMsg.Text1.Text = "请输入用户登录账号!"
   Exit Sub
Else
  sql = "select * from user_table where [登录名]='" & Trim(Text1.Text) & "'"   '查找用户登录名
  rst.Close
  rst.Open sql, con, adOpenDynamic, adLockOptimistic
     If rst.RecordCount <= 0 Then
      frmMsg.Show
     frmMsg.error.Visible = True
  frmMsg.Text1.Text = "用户名不存在！"
       Exit Sub
     End If
     '用户合法性检测并赋予一定的权限级别
    If LCase(Trim(rst![登录名])) = LCase(Trim(Text1.Text)) Then
      If Trim(rst![密码]) = Trim(Text2.Text) Then
        privilege = rst![权限]
        Call check_privage(privilege)   '权限分配
       Else
        frmMsg.Show
          frmMsg.error.Visible = True
       frmMsg.Text1.Text = "密码错误，请重新输入！"
        Exit Sub
       End If
   End If
End If
End Sub


 
Private Sub xpcmdbutton2_Click()    '退出系统
End
End Sub

Private Sub xptopbuttons1_Click()
End
End Sub

Private Sub xptopbuttons2_Click(Index As Integer)
Me.WindowState = 1
End Sub