vb.net版机房收费——助你学会七层架构(一)

时间:2022-04-18 05:06:04

我自己写机房的时候,看非常多高人的博客,各种的借鉴,当初务必的纠结,如今整个机房敲完了,写这篇博客给大家一个总体上的、简单理解的七层,期望大家看完这篇文章之后,不会这个纠结了。

首先大家得看了我的上一篇博客:

http://blog.csdn.net/qiumuxia0921/article/details/33738319

我再说就会好说一点,大家仅仅要理解了那张包图之后就能够了。

首先我还是拿最老套、最简单、最先開始的样例Login開始:

1、我们要知道Login须要那几步:查询user表,推断用户是否存在;在worklog中加入用户日志。

2、须要的数据库设计:

这里我就不另外建表,这样大家看的更熟悉,是吧?

vb.net版机房收费——助你学会七层架构(一)

3、建立Entity

实体是依据表来建立的,也就是说,表中有几个字段,Entity的LoginEntity和WorklogEntity类就有几个property。

本着面面俱到的原则,我就晒晒代码,大家别嫌我麻烦:

'**************************
'文 件 名:UserLogin
'命名空间:Entity
'内 容:
'功 能:
'文件关系:
'作 者:邱慕夏
'小 组:邱慕夏
'生成日期:2014-06-07 17:27:28
'版 本 号:V1.0.0.0
'改动日志:
'版权说明:
'***************************
Public Class LoginEntity
#Region "定义变量"
Private _userID As String
Private _level As String
Private _Head As String
Private _password As String
Private _oldpassword As String
Private _userName As String
Private _computer As String #End Region
Public Shared UserHead As String '设置全局变量
Public Shared UserLevel As String
Public Property UserID() As String '将T_User_DAL表中的每个实体都传上去,实体是依据表来建的,不是功能
Get
Return _userID
End Get
Set(ByVal value As String)
_userID = value
End Set
End Property
Public Property Level() As String
Get
Return _level
End Get
Set(ByVal value As String)
_level = value
End Set
End Property
Public Property Head() As String
Get
Return _Head
End Get
Set(ByVal value As String)
_Head = value
End Set
End Property
Public Property Password() As String
Get
Return _password
End Get
Set(ByVal value As String)
_password = value
End Set
End Property
Public Property OldPassword() As String
Get
Return _oldpassword
End Get
Set(ByVal value As String)
_oldpassword = value
End Set
End Property
Public Property UserName() As String
Get
Return _userName
End Get
Set(ByVal value As String)
_userName = value
End Set
End Property
Public Property computer() As String
Get
Return _computer
End Get
Set(ByVal value As String)
_computer = value
End Set
End Property End Class

上面是LoginEntity的,以下是Worklog的:

'**************************
'文 件 名:WorkLogEntity
'命名空间:Entity
'内 容:
'功 能:
'文件关系:
'作 者:邱慕夏
'小 组:邱慕夏
'生成日期:2014/6/15 11:07:47
'版 本 号:V1.0.0.0
'改动日志:
'版权说明:
'***************************
Public Class WorkLogEntity
Private _userid As String
Private _level As String
Private _loginDateTime As String
Private _LogoutDateTime As String
Private _computer As String
Private _status As String
Public Shared Property Login_DateTime As String Public Property UserID() As String
Get
Return _userid
End Get
Set(ByVal value As String)
_userid = value
End Set
End Property
Public Property Level() As String
Get
Return _level
End Get
Set(ByVal value As String)
_level = value
End Set
End Property
Public Property LoginDateTime() As String
Get
Return _loginDateTime
End Get
Set(ByVal value As String)
_loginDateTime = value
End Set
End Property
Public Property LogoutDateTime() As String
Get
Return _LogoutDateTime
End Get
Set(ByVal value As String)
_LogoutDateTime = value
End Set
End Property
Public Property Computer() As String
Get
Return _computer
End Get
Set(ByVal value As String)
_computer = value
End Set
End Property
Public Property Status() As String
Get
Return _status
End Get
Set(ByVal value As String)
_status = value
End Set
End Property
End Class

这里我要说的是LoginEntity中的全局变量,全局变量是系统仅仅要赋给它值,他就会随程序共存亡,所以不须要操心用的时候会为nothing。

以上都是准备工作,因为篇幅,看下一篇。