static void Main(string[] args)
{
StudentSystemDBContext context = new StudentSystemDBContext();
//IEnumerable<Student> students = context.Students;
//foreach (var student in students)
//{
// Console.WriteLine($"{student.Name}");
// foreach (var homework in student.Homeworks)
// {
// Console.WriteLine($"{homework.Content},{homework.ContentType}");
// }
//}
//IEnumerable<Cours> courses = context.Courses;
//foreach (var cours in courses.OrderBy(cours => cours.StartDate).ThenBy(c => c.EndDate))
//{
// Console.WriteLine($"{cours.Name}, {cours.Description}");
// foreach (var resours in cours.Resourses)
// {
// Console.WriteLine($"{resours.Name}, {resours.ResourceType}, {resours.URL}");
// }
//}
//IEnumerable<Cours> courses = context.Courses
// .Where(c => c.Resourses.Count() > 5)
// .OrderByDescending(c => c.Resourses.Count())
// .ThenByDescending(c => c.StartDate);
//foreach (var cours in courses)
//{
// Console.WriteLine($"{cours.Name}, {cours.Resourses.Count()}");
//}
//IEnumerable<Cours> courses = context.Courses.Where(c => c.StartDate < DateTime.Now && c.EndDate > DateTime.Now);
//foreach (var cours in courses)
//{
// Console.WriteLine($"{cours.Name}, {cours.Students.Count()}");
//}
IEnumerable <Student> students = context.Students;
foreach (var student in students.OrderBy(s => s.Courses.Max()))
{
decimal totalPrice = 0.0M;
List <decimal> avg = new List <decimal>();
foreach (var cours in student.Courses)
{
totalPrice += cours.Price;
avg.Add(cours.Price);
}
Console.WriteLine($"{student.Name}, {student.Courses.Count()}, {totalPrice}, {avg.Average()}");
}
}
private static void CoursesOnAGivenDate(StudentSystemDBContext context)
{
var date = context.Courses.Select(s => s.StartDate).OrderBy(x => x).Skip(2).FirstOrDefault();
Console.WriteLine("Given date:" + date.ToString("dd/MM/yyyy"));
var courses = context.Courses.Where(x => x.StartDate <date && x.EndDate> date).ToList();
foreach (var course in courses.OrderByDescending(x => x.Students.Count).ThenByDescending(d => d.EndDate - d.StartDate))
{
Console.WriteLine($"Course name: {course.Name} Start: {course.StartDate.ToString("dd/MM/yyyy")} End: {course.EndDate.ToString("dd/MM/yyyy")} Duration {(course.EndDate - course.StartDate).Days} days Enrolled: {course.Students.Count}");
}
}
private static void ListCoursesWithMoreThan5Resources(StudentSystemDBContext context)
{
var courses = context.Courses
.Where(x => x.Resources.Count > 5)
.OrderByDescending(j => j.Resources.Count)
.ThenByDescending(sd => sd.StartDate)
.ToList();
foreach (var course in courses)
{
Console.WriteLine($"Course name: {course.Name} | Resource count: {course.Resources.Count}");
}
}
private static void StudentStats(StudentSystemDBContext context)
{
var students = context.Students
.OrderByDescending(x => x.Courses.Sum(z => z.Price))
.ThenByDescending(c => c.Courses.Count)
.ThenBy(s => s.Name)
.ToList();
Console.WriteLine($"Total students: {students.Count}");
foreach (var student in students)
{
Console.WriteLine($"Name: {student.Name}, Courses: {student.Courses.Count}, Price: {student.Courses.Sum(x => x.Price)}, Average: {student.Courses.Average(a => a.Price)}");
}
}
private static void ListAllCoursesWithResources(StudentSystemDBContext context)
{
var courses = context.Courses.ToList();
foreach (var course in courses.OrderBy(x => x.StartDate).ThenByDescending(z => z.EndDate))
{
Console.WriteLine($"Course name: {course.Name}");
Console.WriteLine($"Description: {course.Description}");
Console.WriteLine("Resources:");
foreach (var res in course.Resources)
{
Console.WriteLine($"Name: {res.Name}, Type: {res.ResourceType}, Url: {res.URL}");
}
}
}
private static void ListAllStudentsAndHw(StudentSystemDBContext context)
{
var students = context.Students.ToList();
foreach (var student in students)
{
Console.WriteLine($"Student name: {student.Name}");
Console.WriteLine("Homework:");
foreach (var hw in student.Homework)
{
Console.WriteLine($"{hw.Content} - {hw.ContentType}");
}
Console.WriteLine(new string('-', 20));
}
}
static void Main(string[] args)
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
Console.WriteLine($"Started....");
var context = new StudentSystemDBContext();
context.Database.Initialize(true);//Read description first
stopwatch.Stop();
Console.WriteLine($"Finished!\nTime elapsed: {stopwatch.Elapsed.TotalMilliseconds} milliseconds");
//Exercise 1 and 2:
//The data in the seed method in the Configuration seeds the database with random data,
//since the data is randomly generated it is 99.9 % sure that it will add it rather
//then update it since the chances of dublicate values is slim to none.
//If you don't want the random data you can always hardcore some data in the generator methods in Configuration.cs,
//either way everything works with the data generation AddorUpdate
//Exercise 3
////3.1
//ListAllStudentsAndHw(context);
////3.2
//ListAllCoursesWithResources(context);
////3.3
//ListCoursesWithMoreThan5Resources(context);
////3.4
//CoursesOnAGivenDate(context);
////3.5
//StudentStats(context);
//Exercise 4
//You can take a look at Resource.cs License.cs and The Migration file.
//There is also a handy diagram picture in the files.
}
