组合的组合不起作用
我目前正在使用 RIA 服务，该对象包含一个子对象，该子对象本身也包含一个子对象，但它不起作用:-(！
我有一个 BaseObject 的更新方法，并且 FirstChild 正确存在于客户端中，但它的行为就像我没有 SecondChild 一样对象（类型不是在客户端创建的事件）...
以下是类：
[MetadataType(typeof(BaseObjectMetaData))]
public partial class BaseObject
{
internal class BaseObjectMetaData
{
[Include, Composition]
EntityCollection<FirstChild> FirstChilds { get; set; }
}
}
[MetadataType(typeof(FirstChildMetaData))]
public partial class FirstChild:
{
internal class FirstChildMetaData
{
[Include, Composition]
EntityCollection<SencondChild> SecondChilds { get; set; }
}
}
I am currently using RIA services with an object containing a child containing itself a child and it's not working :-( !
I have an update method for the BaseObject and the FirstChild are correctly present in the client but it behaves as if I have no SecondChild object (the type is not event created on the client)...
Here are the classes:
[MetadataType(typeof(BaseObjectMetaData))]
public partial class BaseObject
{
internal class BaseObjectMetaData
{
[Include, Composition]
EntityCollection<FirstChild> FirstChilds { get; set; }
}
}
[MetadataType(typeof(FirstChildMetaData))]
public partial class FirstChild:
{
internal class FirstChildMetaData
{
[Include, Composition]
EntityCollection<SencondChild> SecondChilds { get; set; }
}
}
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您还需要使用 AssociationAttribute 为 Collection 属性添加属性，并在实体类上包含 ForeignKey 并在属性 ctor 参数中引用它，请记住包含 >DataMemberAttribute 以及（实体框架默认情况下已在生成的成员上执行此操作）
这里 一篇文章进一步概述了它
You need to also attribute your Collection property with the AssociationAttribute as well as include a ForeignKey on your entity class and reference it in the attributes ctor arguments, remember to include the DataMemberAttribute as well (entity framework already does this by default on generated members)
heres an article outlining it further