包含EntityFramework的多个表

Question

我有3张如下图所示的表格

我在c＃（自动生成）

上有实体框架codefirst模型

我正在尝试从包含每个元素的附件列表的实体中获取IEnumerable，并且我希望每个附件中包含AttachmentType的附件元素。

我需要更好的演示：

public IEnumerable<Registry> GetTableData()
    {
        IQueryable<Registry> _registries = _entities.Registry;
        IEnumerable<Registry> data;
        data = _registries
        .Where(p=>p.IsDeleted==false)
        .Include(p=>p.Attachments.Where(x=>x.IsDeleted==false))
        .AsEnumerable();//this query should have change because I cant get Attachmenttypes from this            
        return data;
    }

与GetTableData（）方法类似

        SELECT DISTINCT  ?subjectPrefLabel ?a ?b ?o
    WHERE
        { 
            ?subject skosxl:prefLabel/skosxl:literalForm ?subjectPrefLabel .
    ?subject skos:broader/skos:broader/skos:broader/skosxl:prefLabel/skosxl:literalForm ?a


    FILTER regex(?subjectPrefLabel, "Dreamworks", 'i')
        }
    ORDER BY ?subjectPrefLabel

谢谢大家，感谢您的帮助。

Answer 1

您还必须在查询中添加额外的AttachmentType Include。

public IEnumerable<Registry> GetTableData()
{
    IQueryable<Registry> _registries = _entities.Registry;

    IEnumerable<Registry> data = _registries
        .Include(x => x.Attachments)
        .Include("Attachments.AttachmentType")
         // here do necessary filtering with Where()
         // ...

    return data;
}

Answer 2

使用此功能

public IEnumerable<Registry> GetTableData()
    {
        IQueryable<Registry> _registries = _entities.Registry,where(m=>m.IsDeleted==false);
        IEnumerable<Registry> data;
        data = _registries     .Include(p=>p.Attachments.Where(x=>x.IsDeleted==false)).
 include(p=>p.AttachmentType).AsEnumerable();
        return data;
    }