java - asp MVC 存储库中的返回类型问题

Question

我使用 list .Tolist() 但返回时显示错误。我在 asp.net MVC getaway/repository 中使用此方法。我也想找出这个问题但是没找出问题

public List<Floor> GetBuildingInfoByBuildId(int floor_Id)
        {
            var result = (from floor in db.Floors
                          join c in db.Campuses on floor.CampusID equals c.ID
                          join build in db.Buildings on floor.BuildingID equals build.ID
                          where (floor.ID == floor_Id)
                          select new
                          {
                              floor.ID,
                              floor.Floor_Name,
                              c.Campus_Name,
                              build.Building_Name
                          }).Tolist();
            return result;             
        }

Answer 1

您需要在 select 语句中指定类对象。

public List<Floor> GetBuildingInfoByBuildId(int floor_Id)
    {
        return (from floor in db.Floors
                      join c in db.Campuses on floor.CampusID equals c.ID
                      join build in db.Buildings on floor.BuildingID equals build.ID
                      where (floor.ID == floor_Id)
                      select new Floor
                      {
                          floor.ID,
                          floor.Floor_Name,
                          c.Campus_Name,
                          build.Building_Name
                      }).Tolist();

    }

希望对您有所帮助。