L2S从父级查询子对象（1-many关系）

Question

var obj = from r in db.ParentTables
          where r.ChildTable.Count > 0 // &&  How can we get the Child table data by parsing value by query string.? for eg: r.ChildTable.Language= English
          select r;

我需要将返回的查询维护为r，即IEnumerable

Answer 1

如果我理解你的问题，正在寻找类似的东西

var obj = from r in db.ParentTables
          where r.ChildTable.Any(c => c.Language = "English")
          select r;

Answer 2

var obj = from r in db.ParentTables
          where r.ChildTable.Any(c => c.Count() > 0 && c.Language == "English")
          select r;