实体框架获取带有子实体的实体

Question

I need a list of items. Every item has a list of files. What I need is all the items for a certain date and every item needs to include its files. So far I have

var result = (from i in db.Context.Items.AsNoTracking()
                          where EntityFunctions.TruncateTime(i.Date) == date.Date
                          select i).ToList();

            return result; 

This gives me all the items and it's basic properties like name and id and such. But the list of files is empty. Anyone can help me with this?

Answer 1

Try this:

var result = (from i in db.Context.Items.AsNoTracking()
                      where EntityFunctions.TruncateTime(i.Date) == date.Date
                      select i).Include(i=>i.Files).ToList();

        return result;

Make sure that you have System.Data.Entity referenced to get this .Include extension method overload.