// GET: Students
public async Task <IActionResult> Index(string sortOrder, string searchString, int?variantId)
{
IEnumerable <Student> students;
if (variantId != null)
{
students = await _studentRepository.GetStudentsInVariant(variantId.Value);
}
else
{
students = await _studentRepository.GetAllStudents();
}
if (!string.IsNullOrEmpty(searchString))
{
students = await StudentViewModel.SelectStudentsByNameOrLogin(students, searchString);
}
if (!string.IsNullOrEmpty(sortOrder))
{
students = await StudentViewModel.SortStudents(students, sortOrder);
}
var studentsVm = students.Select(StudentViewModel.CreateStudentVm);
ViewBag.VariantId = variantId;
ViewBag.NameSort = sortOrder == "Name"
? "name_desc" : "Name";
ViewBag.LoginSort = sortOrder == "Login"
? "login_desc" : "Login";
ViewBag.VariantSort = sortOrder == "Variant"
? "variant_desc" : "Variant";
ViewData["Variants"] = new SelectList(await _variantRepository.GetAllVariants(), "Id", "Title");
return(View(studentsVm));
}