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我想用一個特定的Id急切地加載一個類實例。然後我想要包括與A實例相關的每個B類實例和包含與B實例相關的每個C實例。使用.Include()加載多個實體。()
這不起作用:
var schoolyear = _context.Schoolyears
.Include(s => s.SchoolclassCodes)
.Include(s => s.TimeTableEntries)
.SingleOrDefault(s => s.Id == schoolyearId);
最後.INCLUDE是在錯誤的水平。它必須與.SchoolclassCodes相關。
這是不可能的stronly類型.INCLUDE()或者我必須使用weaked類型風格:
var schoolyear = _context.Schoolyears
.Include("SchoolclassCode.TimeTableEntries")
.SingleOrDefault(s => s.Id == schoolyearId);
class Schoolyear
{
public int Id { get; set;}
public ICollection<SchoolclassCode> {get;set;}
}
class SchoolclassCode
{
public ICollection<TimeTableEntry> {get;set;}
}
class TimeTableEntry
{
}
是的,它甚至與我所需要的SingleOrDefault,謝謝合作。似乎我忽略了.Select()在該網站上它只是:http://msdn.microsoft.com/en-us/data/jj574232.aspx – Elisabeth