public async Task <IActionResult> Edit(int id, [Bind("StudentAssignmentModelId,AuId,AssignmentId")] StudentAssignmentModel studentAssignmentModel) { if (id != studentAssignmentModel.AssignmentId) { return(NotFound()); } if (ModelState.IsValid) { try { _context.Update(studentAssignmentModel); await _context.SaveChangesAsync(); } catch (DbUpdateConcurrencyException) { if (!StudentAssignmentModelExists(studentAssignmentModel.AssignmentId)) { return(NotFound()); } else { throw; } } return(RedirectToAction(nameof(Index))); } ViewData["AssignmentId"] = new SelectList(_context.Assignments, "AssignmentId", "AssignmentId", studentAssignmentModel.AssignmentId); ViewData["AuId"] = new SelectList(_context.Students, "AuId", "AuId", studentAssignmentModel.AuId); return(View(studentAssignmentModel)); }