static void Main(string[] args) { BusinessLayer.BusinessLayer bl = new BusinessLayer.BusinessLayer(); bool run = true; while (run) { Console.WriteLine(""); Console.WriteLine("----- Respository Program -----"); Console.WriteLine("[ Teacher ]"); Console.WriteLine("1. Add Teacher"); Console.WriteLine("2. Update Teacher"); Console.WriteLine("3. Remove Teacher"); Console.WriteLine("4. Display all courses associated with a Teacher ID"); Console.WriteLine("5. Display all teachers"); Console.WriteLine(""); Console.WriteLine("[ Course ]"); Console.WriteLine("6. Add Course"); Console.WriteLine("7. Update Course"); Console.WriteLine("8. Remove Course"); Console.WriteLine("9. Display all courses"); Console.WriteLine("-------------------------------"); Console.WriteLine("0. Exit"); Console.WriteLine("Select an option: "); Console.WriteLine(""); int optionInt = Convert.ToInt32(Console.ReadLine()); if (optionInt == 1) { Console.WriteLine("Teacher Name ?"); string name = Console.ReadLine(); Teacher temp = new Teacher { TeacherName = name }; bl.AddTeacher(temp); } else if (optionInt == 2) { Console.WriteLine("1. Update Teacher by teacher id"); Console.WriteLine("2. Update Teacher by teacher name"); Console.WriteLine("Select an option: "); int subOption = Convert.ToInt32(Console.ReadLine()); if (subOption == 1) { Console.WriteLine("Teacher ID ?"); int id = Convert.ToInt32(Console.ReadLine()); Teacher teacher = bl.GetTeacherByID(id); if (teacher == null) { Console.WriteLine("Teacher not found!"); } else { Console.WriteLine("Enter new teacher name: "); teacher.TeacherName = Console.ReadLine(); bl.UpdateTeacher(teacher); } } else if (subOption == 2) { Console.WriteLine("Teacher Name ?"); string name = Console.ReadLine(); Teacher temp = bl.GetTeacherByName(name); if (temp == null) { Console.WriteLine("Teacher not found!"); } else { int id = temp.TeacherId; Teacher teacher = bl.GetTeacherByID(id); if (teacher == null) { Console.WriteLine("Teacher not found!"); } else { Console.WriteLine("Enter new teacher name: "); teacher.TeacherName = Console.ReadLine(); bl.UpdateTeacher(teacher); } } } else { Console.WriteLine("Input is invalid"); } } else if (optionInt == 3) { Console.WriteLine("Teacher ID to be deleted?"); int id = Convert.ToInt16(Console.ReadLine()); Teacher teacher = bl.GetTeacherByID(id); if (teacher == null) { Console.WriteLine("Teacher not found !"); } else { Teacher temp = bl.GetCoursesByTeacherID(id); foreach (var i in temp.Courses) { Course c = bl.GetCourseByID(i.CourseId); c.TeacherId = null; bl.UpdateCourse(c); } bl.RemoveTeacher(teacher); } } else if (optionInt == 4) { Console.WriteLine("Teacher ID ?"); int id = Convert.ToInt32(Console.ReadLine()); Teacher teacher = bl.GetCoursesByTeacherID(id); if (teacher == null || teacher.Courses.Count == 0) { Console.WriteLine("No courses associated with this Teacher ID"); } else { foreach (Course c in teacher.Courses) { Console.WriteLine("- " + c.CourseName); } } } else if (optionInt == 5) { IEnumerable <Teacher> allTeachers = bl.GetAllTeachers(); Console.WriteLine(); Console.WriteLine("ID Teacher Name"); foreach (Teacher temp in allTeachers) { Console.WriteLine(temp.TeacherId + " " + temp.TeacherName); } Console.WriteLine(); } else if (optionInt == 6) { Console.WriteLine("Teacher ID ?"); int id = Convert.ToInt32(Console.ReadLine()); Teacher teacher = bl.GetTeacherByID(id); if (teacher == null) { Console.WriteLine("Teacher not found!"); } else { Console.WriteLine("Course Name? "); string cName = Console.ReadLine(); //Console.WriteLine("Course Location? "); //string cLocation = Console.ReadLine(); Course temp = new Course() { CourseName = cName, TeacherId = id }; bl.AddCourse(temp); } } else if (optionInt == 7) { Console.WriteLine("1. Update Course by Course id"); Console.WriteLine("2. Update Course by Course name"); Console.WriteLine("Select an option: "); int subOption = Convert.ToInt32(Console.ReadLine()); if (subOption == 1) { Console.WriteLine("Course ID ?"); int id = Convert.ToInt32(Console.ReadLine()); Course course = bl.GetCourseByID(id); if (course == null) { Console.WriteLine("Course not found"); } else { Console.WriteLine("Enter new course name: "); course.CourseName = Console.ReadLine(); IEnumerable <Teacher> allTeachers = bl.GetAllTeachers(); Console.WriteLine(""); Console.WriteLine("Current available Teachers"); foreach (Teacher temp in allTeachers) { Console.WriteLine(temp.TeacherId + " " + temp.TeacherName); } Console.WriteLine("Current teacher id is " + course.TeacherId + " . Please enter new teacher id: "); int idTemp = Convert.ToInt32(Console.ReadLine()); bool flag = false; foreach (Teacher temp in allTeachers) { if (idTemp == temp.TeacherId) { flag = true; } } if (flag == true) { course.TeacherId = idTemp; bl.UpdateCourse(course); } else { Console.WriteLine("Teacher ID is invalid"); } } } else if (subOption == 2) { Console.WriteLine("Course Name ?"); string name = Console.ReadLine(); Course tempCourse = bl.GetCourseByName(name); if (tempCourse == null) { Console.WriteLine("Course not found!"); } else { int id = tempCourse.CourseId; Course course = bl.GetCourseByID(id); if (course == null) { Console.WriteLine("Course not found!"); } else { Console.WriteLine("Enter new course name: "); course.CourseName = Console.ReadLine(); IEnumerable <Teacher> allTeachers = bl.GetAllTeachers(); Console.WriteLine(""); Console.WriteLine("Current available Teachers"); foreach (Teacher temp in allTeachers) { Console.WriteLine(temp.TeacherId + " " + temp.TeacherName); } Console.WriteLine("Current teacher id is " + course.TeacherId + " . Please enter new teacher id: "); int idTemp = Convert.ToInt32(Console.ReadLine()); bool flag = false; foreach (Teacher temp in allTeachers) { if (idTemp == temp.TeacherId) { flag = true; } } if (flag == true) { course.TeacherId = idTemp; bl.UpdateCourse(course); } else { Console.WriteLine("Teacher ID is invalid"); } } } } else { Console.WriteLine("Input is invalid"); } } else if (optionInt == 8) { Console.WriteLine("Course ID to be deleted?"); int id = Convert.ToInt32(Console.ReadLine()); Course course = bl.GetCourseByID(id); if (course == null) { Console.WriteLine("Course not found!"); } else { bl.RemoveCourse(course); } } else if (optionInt == 9) { IEnumerable <Course> allCourses = bl.GetAllCourses(); Console.WriteLine(); Console.WriteLine($"\t {"ID",-5}" + $"{"Course name",-15}" + $"{"TeacherID",-15}"); //Console.WriteLine("ID Course Name TeacherID"); foreach (Course temp in allCourses) { Console.WriteLine($"\t {temp.CourseId,-5}" + $"{temp.CourseName,-15}" + $"{temp.TeacherId,-15}"); //Console.WriteLine(temp.CourseId + " " + temp.CourseName+ " " + temp.TeacherId); } Console.WriteLine(); } else if (optionInt == 0) { run = false; } else { Console.WriteLine("Input is invalid, please re-enter the option from 0-9"); } } //end while }
public static void Main(string[] args) { IBusinessLayer blayer = new BusinessLayer.BusinessLayer(); IEnumerable <Student> students = blayer.GetAllStudents(); IEnumerable <Teacher> teachers = blayer.GetAllTeachers(); IEnumerable <Course> coursesList = blayer.GetAllCourses(); foreach (var s in blayer.GetAllStudents()) { Console.WriteLine(s.StudentName); foreach (var c in s.Courses) { Console.WriteLine(c.CourseName); } } bool exit = false; while (!exit) { Console.WriteLine( "\n\nMenu\n" + "Teach Actions:\n" + "[1] Create\n" + "[2] Update using Teacher ID\n" + "[3] Update using Teacher Name\n" + "[4] Delete\n" + "[5] Display All" + "\n\n" + "Course Actions:\n" + "[6] Create\n" + "[7] Update using Course ID\n" + "[8] Update using Course Name\n" + "[9] Delete\n" + "[10] Display All\n" + "\n[0] Exit"); Console.Write("Choice: "); try { int choice = Convert.ToInt32(Console.ReadLine()); switch (choice) { case 1: Teacher t = AddTeacher(); if (t != null) { blayer.AddTeacher(t); Console.WriteLine("Teacher added!"); } break; case 2: UpdateTeacher(blayer); break; case 3: UpdateTeacherByName(blayer); break; case 4: RemoveTeacher(blayer); break; case 5: DisplayAll <Teacher>(blayer); break; case 6: AddCourse(blayer); break; case 7: ModifyCourseByID(blayer); break; case 8: ModifyCourseByName(blayer); break; case 9: RemoveCourse(blayer); break; case 10: DisplayAll <Course>(blayer); break; case 0: exit = true; break; default: Console.WriteLine("Invalid option."); break; } Console.WriteLine("Press any key to continue..."); Console.ReadKey(); } catch (Exception) { Console.WriteLine("Wrong input type.\nPress any key to continue..."); Console.ReadKey(); } } }
static void Main(string[] args) { int choice = -1; bool exit = true; do { Console.WriteLine ( "\n0. Exit Program \n" + "1. Add Teachers \n" + "2. Update Teacher \n" + "3. Delete Teacher \n" + "4. Display all Teachers \n" + "5. Display Teacher's Courses by Teacher id \n" + "6. Add Course \n" + "7. Update Course \n" + "8. Delete Course \n" + "9. Display all Courses\n" ); try { choice = Int32.Parse(Console.ReadLine()); } catch { Console.WriteLine("Selection invalid\n"); } BusinessLayer.BusinessLayer myBusinessLayer = new BusinessLayer.BusinessLayer(); switch (choice) { case 0: exit = false; Environment.Exit(0); break; case 1: Add(myBusinessLayer, LayerType.TEACHER); break; case 2: Update(myBusinessLayer, LayerType.TEACHER); break; case 3: Delete(myBusinessLayer, LayerType.TEACHER); break; case 4: foreach (var t in myBusinessLayer.GetAllTeachers()) { Console.WriteLine(t.TeacherId + " " + t.TeacherName); } break; case 5: Console.WriteLine("Teacher Id:"); int Id = Int32.Parse(Console.ReadLine()); var coursePrint = myBusinessLayer.GetAllCourses().Where(t => t.TeacherId == Id); foreach (var course in coursePrint) { Console.WriteLine(course.CourseId + " " + course.CourseName + " "); } break; case 6: Add(myBusinessLayer, LayerType.COURSE); break; case 7: Update(myBusinessLayer, LayerType.COURSE); break; case 8: Delete(myBusinessLayer, LayerType.COURSE); break; case 9: foreach (var c in myBusinessLayer.GetAllCourses()) { Console.WriteLine(c.CourseId + " " + c.CourseName); } break; default: Console.WriteLine("Please select a valid Menu Option"); break; } }while (exit); }