// PUT api/MyData/5
        public IHttpActionResult PutMyData(int id, MyData mydata)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != mydata.Id)
            {
                return BadRequest();
            }

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

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

            return StatusCode(HttpStatusCode.NoContent);
        }
        public IHttpActionResult PostMyData(MyData mydata)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            db.MyDatas.Add(mydata);
            db.SaveChanges();

            return CreatedAtRoute("DefaultApi", new { id = mydata.Id }, mydata);
        }