private static void CreateDemo()
{
using (var db = new UniversityDbContext(ConnectionString))
{
var data = new TestData(new Random());
data.Professors.ForEach(p => db.Professors.Add(p));
data.Students.ForEach(s => db.Students.Add(s));
db.SaveChanges();
}
}
private static void RunDemo()
{
using (var db = new UniversityDbContext(ConnectionString)) // write your code in this block
{
var stud = new Student()
{
Jmbag = "0036123456",
Name = "Pero"
};
var prof = new Professor()
{
Name = "Ivan"
};
stud.Mentor = prof;
db.Students.Add(stud);
db.Professors.Add(prof);
db.SaveChanges();
Console.WriteLine(db.Students.Find(stud.Jmbag)?.Name);
var s = db.Students.Find(stud.Jmbag);
s.Name = "Petar";
db.Entry(s).State = EntityState.Modified;
db.SaveChanges();
Console.WriteLine(db.Students.Find(stud.Jmbag)?.Name);
var p1 = db.Professors.Where(p => p.Name.StartsWith("I")).Select(p => "Id: " + p.Id);
Console.WriteLine(p1.FirstOrDefault());
var p2 = from p in db.Professors
where p.Name.StartsWith("I")
select "Id: " + p.Id;
Console.WriteLine(p2.FirstOrDefault());
db.Students.Remove(stud);
db.SaveChanges();
Console.WriteLine(db.Students.Find(stud.Jmbag)?.Name);
Console.WriteLine(db.Professors.Find(prof.Id)?.Name);
}
}
private static void DeleteDemo()
{
using (var db = new UniversityDbContext(ConnectionString))
{
var profs = db.Professors.ToList();
profs.ForEach(p => db.Professors.Remove(p));
var studs = db.Students.ToList();
studs.ForEach(s => db.Students.Remove(s));
var cs = db.Classes.ToList();
cs.ForEach(c => db.Classes.Remove(c));
db.SaveChanges();
}
Console.WriteLine(">IZBRISANO");
}