private void ReadData(string fileName) { string path = SessionData.currentPath + "\\" + fileName; if (File.Exists(path)) { OutputWriter.WriteMessageOnNewLine("Reading data..."); string pattern = @"([A-Z][a-zA-Z#\++]*_[A-Z][a-z]{2}_\d{4})\s+([A-Za-z]+\d{2}_\d{2,4})\s([\s0-9]+)"; Regex rgx = new Regex(pattern); string[] allInputLines = File.ReadAllLines(path); for (int line = 0; line < allInputLines.Length; line++) { if (!string.IsNullOrEmpty(allInputLines[line]) && rgx.IsMatch(allInputLines[line])) { Match currentMatch = rgx.Match(allInputLines[line]); string courseName = currentMatch.Groups[1].Value; string username = currentMatch.Groups[2].Value; string scoresStr = currentMatch.Groups[3].Value; try { int[] scores = scoresStr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries) .Select(int.Parse) .ToArray(); if (scores.Any(x => x > 100 || x < 0)) { OutputWriter.DisplayException(ExceptionMessages.InvalidScore); continue; } if (scores.Length > SoftUniCourse.NumberOfTasksOnExam) { OutputWriter.DisplayException(ExceptionMessages.InvalidNumberOfScores); continue; } if (!this.Students.ContainsKey(username)) { this.students.Add(username, new SoftUniStudent(username)); } if (!this.Courses.ContainsKey(courseName)) { this.courses.Add(courseName, new SoftUniCourse(courseName)); } SoftUniCourse course = this.Courses[courseName]; SoftUniStudent student = this.Students[username]; student.EnrollInCourse(course); student.SetMarkOnCourse(courseName, scores); course.EnrollStudent(student); } catch (Exception ex) { OutputWriter.DisplayException(ex.Message + $"at line : {line}"); } } } this.isDataInitialized = true; OutputWriter.WriteMessageOnNewLine("Data read!"); } else { throw new InvalidPathException(); } }