public ActionResult Edit([Bind(Include = "Id,StudentId,ParentMobileNo,PrimaryTagId,SecondaryTagId,EmailId,StudentName,SchoolBranchId,ClassId,SectionId")] StudentDetail studentDetail)
 {
     if (ModelState.IsValid)
     {
         db.Entry(studentDetail).State = EntityState.Modified;
         db.SaveChanges();
         return(RedirectToAction("Index"));
     }
     ViewBag.ClassId        = new SelectList(db.Classes, "Id", "Name", studentDetail.ClassId);
     ViewBag.PrimaryTagId   = new SelectList(db.TagDetails, "Id", "TagId", studentDetail.PrimaryTagId);
     ViewBag.SchoolBranchId = new SelectList(db.SchoolBranches, "Id", "Name", studentDetail.SchoolBranchId);
     ViewBag.SecondaryTagId = new SelectList(db.TagDetails, "Id", "TagId", studentDetail.SecondaryTagId);
     ViewBag.SectionId      = new SelectList(db.Sections, "Id", "Name", studentDetail.SectionId);
     return(View(studentDetail));
 }