public ActionResult showScores(string courseName) { GetRole(); var studentsScores = repo.GetScoresOfAllStudentsInOneCourse(repo.GetCourseId(courseName)); List <CourseScoreViewModel> scores = new List <CourseScoreViewModel>(); foreach (var item in studentsScores) { scores.Add(new CourseScoreViewModel() { UserId = item.UserId, UserName = item.UserName, Score = item.Score == null ? "" : item.Score.ToString() }); } ViewBag.CourseId = repo.GetCourseId(courseName); return(View(scores)); }