public IHttpActionResult PostCalcHistory(CalcHistory calcHistory)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }
            calcHistory.UpdateDate = DateTime.Now;
            db.CalcHistory.Add(calcHistory);
            db.SaveChanges();

            return CreatedAtRoute("DefaultApi", new { id = calcHistory.ID }, calcHistory);
        }
        public IHttpActionResult PutCalcHistory(int id, CalcHistory calcHistory)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            calcHistory.UpdateDate = DateTime.Now;
            db.Entry(calcHistory).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!CalcHistoryExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }