// GET: Instructors
public async Task <IActionResult> Index(int?id, int?courseId, [FromServices] IInstructorService service)
{
var viewModel = new InstructorListDto();
try
{
viewModel.Instructors = await service.ListAllInstructorsAsync();
if (id.HasValue)
{
ViewData["InstructorId"] = id.Value;
viewModel.Courses = await service.ListAllInstructorCoursesAsync(id.Value);
}
if (courseId.HasValue)
{
ViewData["CourseId"] = courseId.Value;
viewModel.Enrollments = await service.ListAllStudentsEnrolledInCourseAsync(courseId.Value);
}
}
catch (Exception ex)
{
_logger.LogError(ex, "Exception in Index: " + ex.Message);
ViewBag.HasError = true;
ViewBag.Message = Constants.ERROR_MESSAGE_STANDARD + ": " + ex.Message;
}
return(View($"{_viewFolder}Index.cshtml", viewModel));
}