Linq递归

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

public IEnumerable<NavigationMagnetics> GetRegion(List<NavigationMagnetics> list, int id) {     IEnumerable<NavigationMagnetics> query = from region in list                                 where region.Id == id                                 select region;     return query.ToList().Concat(query.ToList().SelectMany(r => GetRegion(list, r.Supid.ToInt32()))); } // 生成最终结果 public List<NavigationMagnetics> GetResult(List<NavigationMagnetics> list, int id) {     List<NavigationMagnetics> regions = new List<NavigationMagnetics>();     regions.AddRange(list.Where(r => r.Id == id));     regions.AddRange(GetRegion(list, regions.Where(x=>x.Id== id).FirstOrDefault().Supid.ToInt32()));     return regions; }