public async Task <IActionResult> Edit(int?id) { if (id == null) { return(RedirectToAction(nameof(Error), new { message = "Id is null" })); } var obj = await _serviceLecture.FindByIdAsync(id.Value); if (obj == null) { return(RedirectToAction(nameof(Error), new { message = "Id not found" })); } LectureFormViewModel view = new LectureFormViewModel { lecture = obj }; return(View(view)); }