public async Task<int> SaveCollegeInfo(CollegeInfo info, long userId)
 {
     var item = _repository.GetByName(info.Name);
     if (item == null)
     {
         info.CreatorUserId = userId;
         await _repository.InsertAsync(info);
     }
     else
     {
         item.TownId = info.TownId;
         var areaItem = _repository.GetRegion(item.Id);
         if (areaItem == null)
         {
             item.CollegeRegion = info.CollegeRegion;
         }
         else
         {
             areaItem.Area = info.CollegeRegion.Area;
             areaItem.Info = info.CollegeRegion.Info;
             areaItem.RegionType = info.CollegeRegion.RegionType;
         }
     }
     return _repository.SaveChanges();
 } 
 public async Task<int> Post(CollegeInfo info)
 {
     return await _service.SaveCollegeInfo(info, User.Identity.Name.GetHashCode());
 }