c# - Include a filtered set of records

Question

Is this possible?

var results = (from c in _context.properties
               where c.strap == somevalue
               select c).include("characteristics).where(characteristics.cat_cd != 'DD');

essentially I want to create this query. I will be include(ing) other tables as the app grows.

select * from properties p,characteristics c
where 
p.strap = c.strap
and c.cat_cd <> 'DD'

Answer 1

您只需join声明：

var set = from property in _context.Properties
          join characteristic in _context.Characteristcs on property.strap equals characteristic.strap
          select new 
          {
              Property = property,
              Characteristic = characteristic
          }

Answer 2

这是我学到的。

var results = (from c in _context.properties
               where c.Characteristics.Any(c=>c.cat_cd == "DD") select c);