public void EntitySplittingWithOfficeAssignment()
{
using (var context = new SchoolEntities())
{
foreach (var person in context.People.OfType <Professor>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.Location})");
}
}
}
public void EntitySplittingWithOfficeAssignment()
{
using (var context = new SchoolEntities())
{
foreach (var person in context.People.OfType<Professor>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.Location})");
}
}
}
public void DemoVanQuery()
{
using (var context =new SchoolEntities())
{
var query = from p in context.People
where p.FullName.FirstName.StartsWith("Bob")
select p.FullName.LastName;
Console.WriteLine(query);
}
}
public void DemoVanQuery()
{
using (var context = new SchoolEntities())
{
var query = from p in context.People
where p.FullName.FirstName.StartsWith("Bob")
select p.FullName.LastName;
Console.WriteLine(query);
}
}
public void FindVsSingleOrDefault()
{
using (var context = new SchoolEntities())
{
context.Database.Log = Console.WriteLine;
int id = 6;
var li1 = (from p in context.People
where p.PersonID == id
select p).SingleOrDefault();
var li2 = context.People.Find(7);
}
}
public void StudentGradesOnStudent()
{
using (var context = new SchoolEntities())
{
foreach (var student in context.People.OfType <Student>())
{
Console.WriteLine($"{student.FullName.FirstName} {student.FullName.LastName}");
foreach (var grade in student.Grades)
{
Console.WriteLine($" {grade.Course.Title}: {grade.Grade}");
}
}
}
}
public void FindVsSingleOrDefault()
{
using (var context = new SchoolEntities())
{
context.Database.Log = Console.WriteLine;
int id = 6;
var li1 = (from p in context.People
where p.PersonID == id
select p).SingleOrDefault();
var li2 = context.People.Find(7);
}
}
public void StudentGradesOnStudent()
{
using (var context = new SchoolEntities())
{
foreach (var student in context.People.OfType<Student>())
{
Console.WriteLine($"{student.FullName.FirstName} {student.FullName.LastName}");
foreach (var grade in student.Grades)
{
Console.WriteLine($" {grade.Course.Title}: {grade.Grade}");
}
}
}
}
public void TestMethod1()
{
using (var context = new SchoolEntities())
{
foreach (var course in context.Courses.OfType <OnsiteCourse>())
{
Console.WriteLine($"{course.Title} {course.Location}");
}
foreach (var course in context.Courses.OfType <OnlineCourse>())
{
Console.WriteLine($"{course.Title} {course.URL}");
}
}
}
public void PagingInEntityFramework()
{
using (var context = new SchoolEntities())
{
for (int i = 0; i < context.People.Count(); i += 5)
{
Console.WriteLine($"[[[[{i}]]]]");
foreach (var p in context.People
.OrderBy(p => p.PersonID)
.Skip(() => i) // <---- query met constant zorgt voor constante query!
.Take(5))
{
Console.WriteLine($"{p.FullName.FirstName} {p.FullName.LastName}");
}
}
}
}
public void TablePerHierarchyOnPerson()
{
using (var context = new SchoolEntities())
{
Console.WriteLine("-- Professors: ");
foreach (var person in context.People.OfType <Professor>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.HireDate})");
}
Console.WriteLine("-- Students: ");
foreach (var person in context.People.OfType <Student>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.EnrollmentDate})");
}
}
}
public void PagingInEntityFramework()
{
using (var context = new SchoolEntities())
{
for (int i = 0; i < context.People.Count(); i += 5)
{
Console.WriteLine($"[[[[{i}]]]]");
foreach (var p in context.People
.OrderBy(p => p.PersonID)
.Skip(() => i) // <---- query met constant zorgt voor constante query!
.Take(5))
{
Console.WriteLine($"{p.FullName.FirstName} {p.FullName.LastName}");
}
}
}
}
public void WatIsLazyLoading()
{
using (var context = new SchoolEntities())
{
//context
// .Configuration
// .LazyLoadingEnabled = false;
foreach (var persoon in context
.People
.OfType <Student>()
.Include(s => s.Grades))
{
foreach (var grades in persoon.Grades)
{
Console.WriteLine(grades.Grade);
}
}
}
}
public void TablePerHierarchyOnPerson()
{
using (var context = new SchoolEntities())
{
Console.WriteLine("-- Professors: ");
foreach (var person in context.People.OfType<Professor>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.HireDate})");
}
Console.WriteLine("-- Students: ");
foreach (var person in context.People.OfType<Student>())
{
Console.WriteLine($"{person.FullName.FirstName} {person.FullName.LastName} ({person.EnrollmentDate})");
}
}
}
public void WatIsLazyLoading()
{
using (var context = new SchoolEntities())
{
//context
// .Configuration
// .LazyLoadingEnabled = false;
foreach (var persoon in context
.People
.OfType<Student>()
.Include(s => s.Grades))
{
foreach (var grades in persoon.Grades)
{
Console.WriteLine(grades.Grade);
}
}
}
}
public void TestMethod1()
{
using (var context = new SchoolEntities())
{
foreach (var course in context.Courses.OfType<OnsiteCourse>())
{
Console.WriteLine($"{course.Title} {course.Location}");
}
foreach (var course in context.Courses.OfType<OnlineCourse>())
{
Console.WriteLine($"{course.Title} {course.URL}");
}
}
}