public void AddProviders(AddStudentApprovalModel viewModel)
{
if (viewModel == null)
{
throw new ArgumentNullException("viewModel");
}
var student = StudentRepository.Items.SingleOrDefault(s => s.Id == viewModel.StudentId);
if (student == null)
{
throw new EntityNotFoundException("Student with specified identifier was not found.");
}
var selectedProviders = ProviderRepository.Items.Where(p => viewModel.ProvidersToAdd.Contains(p.Id)).ToList();
if (selectedProviders.Count < viewModel.ProvidersToAdd.Count())
{
throw new EntityNotFoundException("At least one provider selected cannot be associated with the student because it was not found using the given identifier.");
}
foreach (Provider provider in selectedProviders)
{
StudentRepository.AddLink(student, provider);
}
RepositoryContainer.Save();
}
