public ActionResult Create(StudyInformation studyinformation)
        {
            if (ModelState.IsValid)
            {
                db.StudyInfos.Add(studyinformation);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.StudyId = new SelectList(db.Studies, "Id", "Name", studyinformation.StudyId);
            return View(studyinformation);
        }
 public ActionResult Edit(StudyInformation studyinformation)
 {
     if (ModelState.IsValid)
     {
         db.Entry(studyinformation).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     ViewBag.StudyId = new SelectList(db.Studies, "Id", "Name", studyinformation.StudyId);
     return View(studyinformation);
 }