public void Example12AExplicitLoading()
{
var context = new BazaDanych();
context.Database.Log = s => System.Diagnostics.Debug.WriteLine(s);
var student = context.Students.First();
context.Entry(student).Reference(s => s.Study).Load();
context.Entry(student).Collection(s => s.StudentSubject).Load();
int g = 0;
}
public void Example10UpdatingElement()
{
try
{
var context = new BazaDanych();
context.Database.Log = s => System.Diagnostics.Debug.WriteLine(s);
var stToRemove = new Student
{
IdStudent = 3,
FirstName = "ZMIENIONY",
LastName = "ZMIENIONY",
IdStudies = 1,
Address = "a"
};
context.Students.Attach(stToRemove);
var entry = context.Entry <Student>(stToRemove);
entry.State = EntityState.Modified;
context.SaveChanges();
}
catch (DbEntityValidationException exc)
{
int g = 0;
}
}
public void Example9RemovingElement()
{
try
{
var context = new BazaDanych();
context.Database.Log = s => System.Diagnostics.Debug.WriteLine(s);
var student = new Student
{
IdStudent = 1,
LastName = "Sth"
};
context.Students.Attach(student);
context.Entry <Student>(student).State = EntityState.Modified;
context.SaveChanges(); //
}
catch (Exception exc)
{
int g = 0;
}
}