public static string FilterThaiDistricts(DbManagerProxy manager, Int64 regionID, Int64 rayonID)
{
manager.SetSpCommand("spRayon_SelectLookup"
, manager.Parameter("@RegionID", regionID)
, manager.Parameter("@ID", null)
, manager.Parameter("@LangID", ModelUserContext.CurrentLanguage));
List <RayonLookup> list = new List <RayonLookup>();
List <RayonLookup> filterList = manager.ExecuteList <RayonLookup>();
RayonLookup district = filterList.FirstOrDefault(c => c.idfsRayon == rayonID);
List <string> districtID = new List <string>();
list.AddRange(filterList.Where(c => (c.intRowStatus == 0 && c.idfsParent == rayonID) || (c.idfsRayon == district.idfsRayon) || (c.idfsRayon == -101L /*LookupCache.EmptyLineKey*/)).ToList());
list.ForEach(c => { districtID.Add(c.idfsRayon.ToString()); });
string results = string.Join(",", districtID);
return(results);
}