// PUT api/Default1/5
        public async Task<IHttpActionResult> PutTemperatureReading(int id, TemperatureReading temperaturereading)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != temperaturereading.TemperatureReadingId)
            {
                return BadRequest();
            }

            db.Entry(temperaturereading).State = EntityState.Modified;

            try
            {
                await db.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!TemperatureReadingExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }
        public async Task<IHttpActionResult> PostTemperatureReading(TemperatureReading temperaturereading)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }
            temperaturereading.Date = System.DateTime.Now;
            db.TemperatureReadings.Add(temperaturereading);
            var context = GlobalHost.ConnectionManager.GetHubContext<Temperature_Display.TemperatureHub>();
            context.Clients.All.addNewTemperature(temperaturereading);
            await db.SaveChangesAsync();

            return CreatedAtRoute("DefaultApi", new { id = temperaturereading.TemperatureReadingId }, temperaturereading);
        }