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 Update(BusinessLayer.BusinessLayer myBusinessLayer, LayerType layerType)
{
switch (layerType)
{
case LayerType.TEACHER:
foreach (var s in myBusinessLayer.getAllTeachers())
{
Console.WriteLine(s.TeacherId + " " + s.TeacherName);
}
Console.WriteLine("Enter Teacher ID: ");
int NameTeacher = Int32.Parse(Console.ReadLine());
Console.WriteLine("Enter New Name For Teacher: ");
myBusinessLayer.GetTeacherByID(NameTeacher).TeacherName = Console.ReadLine();
myBusinessLayer.UpdateTeacher(myBusinessLayer.GetTeacherByID(NameTeacher));
Console.WriteLine("Teacher name has been updated to: " + myBusinessLayer.GetTeacherByID(NameTeacher).TeacherName);
break;
case LayerType.COURSE:
foreach (var s in myBusinessLayer.GetAllCourses())
{
Console.WriteLine(s.CourseId + " " + s.CourseName);
}
Console.WriteLine("Enter Course ID: ");
int NameCourse = Int32.Parse(Console.ReadLine());
int choice = -1;
Console.WriteLine
(
"\n 0. Update Name \n " +
"1. Update Teacher \n "
);
try
{
choice = Int32.Parse(Console.ReadLine());
}
catch
{
Console.WriteLine("Selection invalid\n");
}
switch (choice)
{
case 0:
Console.WriteLine("Enter New Name For Course: ");
myBusinessLayer.GetCourseByID(NameCourse).CourseName = Console.ReadLine();
myBusinessLayer.UpdateCourse(myBusinessLayer.GetCourseByID(NameCourse));
Console.WriteLine("Course name has been updated to: " + myBusinessLayer.GetCourseByID(NameCourse).CourseName);
break;
case 1:
Console.WriteLine("Enter New Teacher Id For Course: ");
myBusinessLayer.GetCourseByID(NameCourse).TeacherId = Int32.Parse(Console.ReadLine());
myBusinessLayer.UpdateCourse(myBusinessLayer.GetCourseByID(NameCourse));
Console.WriteLine("Course teacher id has been updated to: " + myBusinessLayer.GetCourseByID(NameCourse).TeacherId);
break;
default:
break;
}
break;
default:
break;
}
}
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
}
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);
}
