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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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  • 原文地址：https://www.cnblogs.com/Leo_wl/p/2445237.html
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