public async Task <IActionResult> Create([Bind("StaffId,StaffPassportNo,FullName,Position,Sex,DateOfBirth,Salary,SuperviserId")] Staff staff) { if (ModelState.IsValid) { int result = await _service.Create(staff); if (result == 0) { ViewData["BackController"] = "Staffs"; ViewData["BackAction"] = "Index"; ViewData["ErrorMessage"] = "Form data has been lost. Database refused your request. Contact sysadmin."; return(View("DbUpdateError")); } return(RedirectToAction("Index")); } ViewData["SuperviserId"] = new SelectList(_service.Staffs(), "StaffId", "FullName", staff.SuperviserId); return(View(staff)); }