public void GradeExam(string studentName, string courseName, int nth)
{
var examAnswer = examAnswerManager.GetAnswer(studentName, courseName, nth);
var testResult = testResultManager.AddTestResult(examAnswer);
int correct = 0;
int total = 0;
foreach (var question in examAnswer.Exam.Questions)
{
var studentAnswer = examAnswer.ExamQuestionAnswers.FirstOrDefault(eqa =>
eqa.QuestionID == question.QuestionID);
var isCorrect = studentAnswer.AnswerAlternativeID ==
question.AnswerAlternatives.FirstOrDefault(a => a.IsCorrect)?.AnswerAlternativeID;
testResultManager.AddAnswer(testResult, studentAnswer.AnswerAlternative, isCorrect);
if (isCorrect)
{
correct++;
}
total++;
}
testResultManager.SetTotalScore(testResult, (decimal)correct / total);
}
