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OEA体验：常用功能3 多对多关系

OEA体验：常用功能3 多对多关系

 
一、摘要

       在这里主要是写OEA设计方面的知识了。OEA 源码：OEA框架 2.9 Pre-Alpha 源码公布

可以到BloodyAngel的博客和中可以下到。虽然现在应经知道使用了，但是还是 需要了解框架相关知识运行机制，让我们更好的使用OEA进行开发。

二、本文大纲

       a、摘要 。

       b、UML图 （业务逻辑梳理，和父子关系的） 。

       c、项目结构，效果图  。

       d、OEA实现方法  。

三、UML图

这个图，我可是求高手求了好久才教我的 嘻嘻。

热点： 网关  设备 用户 小区

他们的关系是：

        网关下面有多个设备

        小区下面有多个用户

       用户下面有多个设备

       设备下面有多个 用户

他们的类图如下：

1b@vq@fkks1}$m$x6dhrisv

象下面这个图里面有个多对多，我们需要把它简化为这样的：这个是OEA提倡的分解关系

[gx}x70o{s`509in]0wnkfc

要用到OEA的外键，父子，界面扩展命令。

四、项目结构，效果图

  项目结构图：

     image对应的数据库结构：image

   效果图：

image

五、OEA实现方法

关联表的代码也是主代码了

image  下面的代码主要是完成这个图啦

 1:  // 设备 用户 关联表
 2:  [ChildEntity, Serializable]
 3:  public class UDAssociation : MyEntity
 4:  {
 5:      public static readonly RefProperty<Device> DeviceRefProperty =
 6:          P<UDAssociation>.RegisterRef(e => e.Device, ReferenceType.Normal);
 7:      public int DeviceId
 8:      {
 9:          get { return this.GetRefId(DeviceRefProperty); }
10:          set { this.SetRefId(DeviceRefProperty, value); }
11:      }
12:      public Device Device
13:      {
14:          get { return this.GetRefEntity(DeviceRefProperty); }
15:          set { this.SetRefEntity(DeviceRefProperty, value); }
16:      }
17:   
18:      public static readonly RefProperty<HouseHold> HouseHoldRefProperty =
19:          P<UDAssociation>.RegisterRef(e => e.HouseHold, ReferenceType.Parent);
20:      public int HouseHoldId
21:      {
22:          get { return this.GetRefId(HouseHoldRefProperty); }
23:          set { this.SetRefId(HouseHoldRefProperty, value); }
24:      }
25:      public HouseHold HouseHold
26:      {
27:          get { return this.GetRefEntity(HouseHoldRefProperty); }
28:          set { this.SetRefEntity(HouseHoldRefProperty, value); }
29:      }
30:   
31:      #region 视图属性
32:      public static readonly Property<string> View_CodeProperty = P<UDAssociation>.RegisterReadOnly(e => e.View_Code, e => (e as UDAssociation).GetView_Code(), null);
33:      public string View_Code
34:      {
35:          get { return this.GetProperty(View_CodeProperty); }
36:      }
37:      private string GetView_Code()
38:      {
39:          return this.Device.Id.ToString();
40:      }
41:   
42:      public static readonly Property<string> View_NameProperty = P<UDAssociation>.RegisterReadOnly(e => e.View_Name, e => (e as UDAssociation).GetView_Name(), null);
43:      public string View_Name
44:      {
45:          get { return this.GetProperty(View_NameProperty); }
46:      }
47:      private string GetView_Name()
48:      {
49:          return this.Device.Name;
50:      }
51:      #endregion
52:  
53:  
54:  }
55:   

一个设备对应多个用户

 1:  // 一个设备对应多个用户
 2:  [ChildEntity, Serializable]
 3:  public class UDHouseHold : MyEntity
 4:  {
 5:      public static readonly RefProperty<UDAssociation> UserDeviceRefProperty =
 6:          P<UDHouseHold>.RegisterRef(e => e.UDAssociation, ReferenceType.Parent);
 7:      public int UDAssociationId
 8:      {
 9:          get { return this.GetRefId(UserDeviceRefProperty); }
10:          set { this.SetRefId(UserDeviceRefProperty, value); }
11:      }
12:      public UDAssociation UDAssociation
13:      {
14:          get { return this.GetRefEntity(UserDeviceRefProperty); }
15:          set { this.SetRefEntity(UserDeviceRefProperty, value); }
16:      }
17:      public static readonly RefProperty<HouseHold> HouseHoldRefProperty =
18:           P<UDHouseHold>.RegisterRef(e => e.HouseHold, ReferenceType.Normal);
19:      public int HouseHoldId
20:      {
21:          get { return this.GetRefId(HouseHoldRefProperty); }
22:          set { this.SetRefId(HouseHoldRefProperty, value); }
23:      }
24:      public HouseHold HouseHold
25:      {
26:          get { return this.GetRefEntity(HouseHoldRefProperty); }
27:          set { this.SetRefEntity(HouseHoldRefProperty, value); }
28:      }
29:   
30:      #region 视ó图?属?性?
31:   
32:      public static readonly Property<string> View_CodeProperty = P<UDHouseHold>.RegisterReadOnly(e => e.View_Code, e => (e as UDHouseHold).GetView_Code(), null);
33:      public string View_Code
34:      {
35:          get { return this.GetProperty(View_CodeProperty); }
36:      }
37:      private string GetView_Code()
38:      {
39:          return HouseHold.Id.ToString();
40:      }
41:   
42:      public static readonly Property<string> View_NameProperty = P<UDHouseHold>.RegisterReadOnly(e => e.View_Name, e => (e as UDHouseHold).GetView_Name(), null);
43:      public string View_Name
44:      {
45:          get { return this.GetProperty(View_NameProperty); }
46:      }
47:      private string GetView_Name()
48:      {
49:          return HouseHold.Name;
50:      }
51:   
52:      #endregion
53:  }
54:   

一个用户有多个设备

 1:  // 一?个?用?户§有D多à个?设è备?
 2:  [ChildEntity, Serializable]
 3:  public class UDDevices : MyEntity
 4:  {
 5:      public static readonly RefProperty<UDAssociation> UDAssociationRefProperty =
 6:            P<UDDevices>.RegisterRef(e => e.UDAssociation, ReferenceType.Parent);
 7:      public int UDAssociationId
 8:      {
 9:          get { return this.GetRefId(UDAssociationRefProperty); }
10:          set { this.SetRefId(UDAssociationRefProperty, value); }
11:      }
12:      public UDAssociation UDAssociation
13:      {
14:          get { return this.GetRefEntity(UDAssociationRefProperty); }
15:          set { this.SetRefEntity(UDAssociationRefProperty, value); }
16:      }
17:      public static readonly RefProperty<Device> DeviceRefProperty =
18:          P<UDDevices>.RegisterRef(e => e.Device, ReferenceType.Normal);
19:      public int DeviceId
20:      {
21:          get { return this.GetRefId(DeviceRefProperty); }
22:          set { this.SetRefId(DeviceRefProperty, value); }
23:      }
24:      public Device Device
25:      {
26:          get { return this.GetRefEntity(DeviceRefProperty); }
27:          set { this.SetRefEntity(DeviceRefProperty, value); }
28:      }
29:  }
30:   

啥也不说了，直接下载源码看了。

 btn_download

作者：罗敏贵
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posted on 2012-04-13 09:36  HackerVirus  阅读(262)  评论(0)  编辑  收藏  举报
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