public async Task <IActionResult> Create() { ViewData["L_Class"] = new SelectList(await _schoolclassService.GetAllAsync(), "C_ID", "C_ID"); ViewData["L_Hour"] = new SelectList(await _periodService.GetAllAsync(), "P_Nr", "P_Nr"); ViewData["L_Teacher"] = new SelectList(await _teacherService.GetAllAsync(), "T_ID", "T_ID"); return(View()); }