vb.net版机房收费——助你学会七层架构(一)
我自己写机房的时候,看很多高人的博客,各种的借鉴,当初务必的纠结,现在整个机房敲完了,写这篇博客给大家一个整体上的、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,大家只要理解了那张包图之后就可以了。
首先我还是拿最老套、最简单、最先开始的例子Login开始:
1、我们要知道Login需要那几步:查询user表,判断用户是否存在;在worklog中添加用户日志。
2、需要的数据库设计:
这里我就不另外建表,这样大家看的更熟悉,是吧?
3、建立Entity
实体是根据表来建立的,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 '修改日志: '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表中的每一个实体都传上去,实体是根据表来建的,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,下面是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 '修改日志: '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,全局变量是系统只要赋给它值,他就会随程序共存亡,所以不需要担心用的时候会为nothing。
以上都是准备工作,由于篇幅,看下一篇。
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