Question

我有一个称为“装置”的模范类,即:

public class DeviceType
{
    int ID { get; set; }
    String Type { get; set; }
    String Description { get; set; } 
    EntityCollection<AttributeDefinition> AttributeDefinitions { get; set; }
}

定义如下:

public class AttributeDefinition
{
    int ID { get; set; }
    String Name { get; set; }
    bool IsPrivate { get; set; }
    bool IsInherited { get; set; }
}

我试图为一种装置铺设细节。在这种观点中,我要向每个阿特曼底省提交一份表格,作为一条可调用的行文,以便你能够在同一页上更新每个阿特曼底。

我试图遵循,但这一员额。我发现这一错误:

The EntityCollection has already been initialized. The InitializeRelatedCollection method should only be called to initialize a new EntityCollection during deserialization of an object graph.

如果没有像自治政府这样的东西,是否有办法这样做? 或许要使用表格,或者使用一种观点吗?

Answer 1

通常不使用名称空间的类别System.Data。采用<代码>List或另一种收集类别修改其观点模式。当你阅读数据库的数据并检索<代码>意向书<>代码>时,你需要将贵实体转换为POCO ojbect,并利用这一新结构作为参考模式。

Answer 2

I would suggest that you create a single entity/model just for your view. I m not sure how the DeviceType and AttributeDefinition are related but your model might look something like this:

public class DeviceTypeEditModel
{
    int ID { get; set; }
    String Type { get; set; }
    String Description { get; set; } 
    EntityCollection<AttributeDefinition> AttributeDefinitions { get; set; }
    AttributeDefinition AttributeDefinition { get; set;}
}

友情链接