static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var b1 = new Book {
ISBN = "978-1-847193-81-0", Title = "jQuery Reference Guide"
};
var b2 = new Book {
ISBN = "978-1-29298333", Title = "jQuery Tips and Tricks"
};
var b3 = new Book {
ISBN = "978-1033988429", Title = "Silverlight 2"
};
var a1 = new Author {
Name = "Jonathan Chaffer"
};
var a2 = new Author {
Name = "Chad Campbell"
};
var ab1 = new AuthorBook {
Author = a1, Book = b1, IsPrimary = true
};
var ab2 = new AuthorBook {
Author = a1, Book = b2, IsPrimary = false
};
var ab3 = new AuthorBook {
Author = a2, Book = b3, IsPrimary = false
};
context.AuthorBooks.AddObject(ab1);
context.AuthorBooks.AddObject(ab2);
context.AuthorBooks.AddObject(ab3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
context.ContextOptions.LazyLoadingEnabled = true;
Console.WriteLine("Authors and Their Books...");
foreach (var author in context.Authors)
{
Console.WriteLine("{0}", author.Name);
foreach (var book in author.Books)
{
Console.WriteLine("\t{0}, ISBN = {1}", book.Title, book.ISBN);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
public void PromoteToMedicine(DateTime acceptedDate, decimal targetPrice, string marketingName)
{
var drug = new Medicine {
DrugId = this.DrugId
};
using (var context = new EFRecipesEntities())
{
context.AttachTo("Drugs", drug);
drug.AcceptedDate = acceptedDate;
drug.TargetPrice = targetPrice;
drug.Name = marketingName;
context.SaveChanges();
}
}
private static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var foreman1 = new Foreman {
Name = "Carl Ramsey"
};
var foreman2 = new Foreman {
Name = "Nancy Ortega"
};
var phone = new Phone {
Number = "817 867-5309"
};
var jobsite = new JobSite
{
JobSiteName = "City Arena",
Address = "123 Main",
City = "Anytown",
State = "TX",
ZIPCode = "76082",
Phone = phone
};
jobsite.Foremen.Add(foreman1);
jobsite.Foremen.Add(foreman2);
var plumber = new Plumber {
Name = "Jill Nichols", Email = "*****@*****.**", JobSite = jobsite
};
context.Tradesmen.Add(plumber);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
var plumber =
context.Tradesmen.OfType <Plumber>().Include("JobSite.Phone").Include("JobSite.Foremen").First();
Console.WriteLine("Plumber's Name: {0} ({1})", plumber.Name, plumber.Email);
Console.WriteLine("Job Site: {0}", plumber.JobSite.JobSiteName);
Console.WriteLine("Job Site Phone: {0}", plumber.JobSite.Phone.Number);
Console.WriteLine("Job Site Foremen:");
foreach (var boss in plumber.JobSite.Foremen)
{
Console.WriteLine("\t{0}", boss.Name);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
int itemId = 0;
using (var context = new EFRecipesEntities())
{
var item = new Item {
Name = "Xcel Camping Tent", UnitPrice = 99.95M
};
context.Items.AddObject(item);
context.SaveChanges();
// keep the item id for the next step
itemId = item.ItemId;
Console.WriteLine("Item: {0}, UnitPrice: {1}", item.Name, item.UnitPrice.ToString("C"));
}
using (var context = new EFRecipesEntities())
{
// pretend this is the updated
// item we received with the new price
var item = new Item {
ItemId = itemId, Name = "Xcel Camping Tent", UnitPrice = 129.95M
};
// use our method to get the entity set name
var itemES = context.GetEntitySet(item);
// create the entity key
var key = context.CreateEntityKey(itemES.Name, item);
// retrieve and update the item
context.GetObjectByKey(key);
context.ApplyCurrentValues(itemES.Name, item);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
var item = context.Items.Single();
Console.WriteLine("Item: {0}, UnitPrice: {1}", item.Name, item.UnitPrice.ToString("C"));
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 0; i < 5000; i++)
{
var account = context.CreateObject <Account>();
account.Name = "Test" + i.ToString();
account.Balance = 10M;
account.Payments.Add(new Payment {
PaidTo = "Test" + (i + 1).ToString(), Paid = 5M
});
context.Accounts.AddObject(account);
}
context.SaveChanges();
watch.Stop();
Console.WriteLine("Time to insert: {0} seconds", watch.Elapsed.TotalSeconds.ToString());
}
using (var context = new EFRecipesEntities())
{
Stopwatch watch = new Stopwatch();
watch.Start();
var accounts = context.Accounts.Include("Payments").ToList();
watch.Stop();
Console.WriteLine("Time to read: {0} seconds", watch.Elapsed.TotalSeconds.ToString());
watch.Restart();
foreach (var account in accounts)
{
account.Balance += 10M;
account.Payments.First().Paid += 1M;
}
context.SaveChanges();
watch.Stop();
Console.WriteLine("Time to update: {0} seconds", watch.Elapsed.TotalSeconds.ToString());
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var student = new Student {
Name = "Joan Williams", EnrollmentDate = DateTime.Parse("1/12/2010")
};
var instructor = new Instructor {
Name = "Rodger Keller", HireDate = DateTime.Parse("7/14/1992")
};
context.People.AddObject(student);
context.People.AddObject(instructor);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// find the student and update the enrollment date
var student = context.People.OfType <Student>().First(s => s.Name == "Joan Williams");
Console.WriteLine("Updating {0}'s enrollment date", student.Name);
// out-of-band update occurs
Console.WriteLine("[Apply rogue update]");
context.ExecuteStoreCommand(@"update chapter14.person set name = 'Joan Smith'
where personId =
(select personId from chapter14.person where name = 'Joan Williams')");
// change the enrollment date
student.EnrollmentDate = DateTime.Parse("5/2/2010");
try
{
context.SaveChanges();
}
catch (OptimisticConcurrencyException ex)
{
Console.WriteLine("Exception: {0}", ex.Message);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var recipe1 = new Recipe {
RecipeName = "Chicken Risotto"
};
var recipe2 = new Recipe {
RecipeName = "Baked Chicken"
};
recipe1.Steps.Add(new Step {
Description = "Bring Broth to a boil"
});
recipe1.Steps.Add(new Step {
Description = "Slowly add Broth to Rice"
});
recipe1.Ingredients.Add(new Ingredient {
Name = "1 Cup White Rice"
});
recipe1.Ingredients.Add(new Ingredient {
Name = "6 Cups Chicken Broth"
});
recipe2.Steps.Add(new Step {
Description = "Bake at 350 for 35 Minutes"
});
recipe2.Ingredients.Add(new Ingredient {
Name = "1 lb Chicken"
});
context.Recipes.AddObject(recipe1);
context.Recipes.AddObject(recipe2);
context.SaveChanges();
Console.WriteLine("All the Related Entities...");
ShowRecipes();
DeleteRelatedEntities(recipe2, context);
Console.WriteLine("\nAfter Related Entities are Deleted...");
ShowRecipes();
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
protected void Page_Load(object sender, EventArgs e)
{
using (var context = new EFRecipesEntities())
{
// delete the previous test data
context.ExecuteStoreCommand("delete from chapter4.contact");
// insert some new test data
context.Contacts.AddObject(new Customer {
Name = "Joan Ryan", Email = "*****@*****.**"
});
context.Contacts.AddObject(new Customer {
Name = "Robert Kelly", Email = "*****@*****.**"
});
context.Contacts.AddObject(new Employee {
Name = "Karen Stanford", HireDate = DateTime.Parse("1/21/2010")
});
context.Contacts.AddObject(new Employee {
Name = "Phil Marlowe", HireDate = DateTime.Parse("2/12/2009")
});
context.SaveChanges();
}
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var exDrug1 = new Experimental {
Name = "Nanoxol", PrincipalResearcher = "Dr. Susan James"
};
var exDrug2 = new Experimental {
Name = "Percosol", PrincipalResearcher = "Dr. Bill Minor"
};
context.Drugs.AddObject(exDrug1);
context.Drugs.AddObject(exDrug2);
context.SaveChanges();
// Nanoxol just got approved!
exDrug1.PromoteToMedicine(DateTime.Now, 19.99M, "Treatall");
context.Detach(exDrug1); // better not use this instance any longer
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Experimental Drugs");
foreach (var d in context.Drugs.OfType <Experimental>())
{
Console.WriteLine("\t{0} ({1})", d.Name, d.PrincipalResearcher);
}
Console.WriteLine("Medicines");
foreach (var d in context.Drugs.OfType <Medicine>())
{
Console.WriteLine("\t{0} Retails for {1}", d.Name, d.TargetPrice.Value.ToString("C"));
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
context.MediaSet.AddObject(new Magazine {
Title = "Field and Stream", PublicationDate = DateTime.Parse("6/12/1945")
});
context.MediaSet.AddObject(new Magazine {
Title = "National Geographic", PublicationDate = DateTime.Parse("7/15/1976")
});
context.MediaSet.AddObject(new DVD {
Title = "Harmony Road", PlayTime = "2 hours, 30 minutes"
});
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
var allMedia = context.GetAllMedia();
Console.WriteLine("All Media");
Console.WriteLine("=========");
foreach (var m in allMedia)
{
if (m is Magazine)
{
Console.WriteLine("{0} Published: {1}", m.Title, ((Magazine)m).PublicationDate.ToShortDateString());
}
else if (m is DVD)
{
Console.WriteLine("{0} Play Time: {1}", m.Title, ((DVD)m).PlayTime);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var hotel = new Hotel {
Name = "Grand Seasons Hotel"
};
var r101 = new Room {
Rate = 79.95M, Hotel = hotel
};
var es201 = new ExecutiveSuite {
Rate = 179.95M, Hotel = hotel
};
var es301 = new ExecutiveSuite {
Rate = 299.95M, Hotel = hotel
};
var res1 = new Reservation {
StartDate = DateTime.Parse("3/12/2010"), EndDate = DateTime.Parse("3/14/2010"), ContactName = "Roberta Jones", Room = es301
};
var res2 = new Reservation {
StartDate = DateTime.Parse("1/18/2010"), EndDate = DateTime.Parse("1/28/2010"), ContactName = "Bill Meyers", Room = es301
};
var res3 = new Reservation {
StartDate = DateTime.Parse("2/5/2010"), EndDate = DateTime.Parse("2/6/2010"), ContactName = "Robin Rosen", Room = r101
};
context.Hotels.AddObject(hotel);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// assume we have an instance of hotel
var hotel = context.Hotels.First();
var rooms = hotel.Rooms.CreateSourceQuery().Include("Reservations").Where(r => r is ExecutiveSuite && r.Reservations.Any()).OrderBy(r => r.Rate);
Console.WriteLine("Executive Suites for {0} with reservations", hotel.Name);
hotel.Rooms.Attach(rooms);
foreach (var room in hotel.Rooms)
{
Console.WriteLine("\nExecutive Suite {0} is {1} per night", room.RoomId.ToString(), room.Rate.ToString("C"));
Console.WriteLine("Current reservations are:");
foreach (var res in room.Reservations.OrderBy(r => r.StartDate))
{
Console.WriteLine("\t{0} thru {1} ({2})", res.StartDate.ToShortDateString(), res.EndDate.ToShortDateString(), res.ContactName);
}
}
}
// alternative approach using .OfType<>()
Console.WriteLine("\n--- Alternative approach using .OfType<>() ---");
using (var context = new EFRecipesEntities())
{
// assume we have an instance of hotel
var hotel = context.Hotels.First();
var rooms = hotel.Rooms.CreateSourceQuery().Include("Reservations").OfType <ExecutiveSuite>().Where(r => r.Reservations.Any()).OrderBy(r => r.Rate);
Console.WriteLine("Executive Suites for {0} with reservations", hotel.Name);
hotel.Rooms.Attach(rooms);
foreach (var room in hotel.Rooms)
{
Console.WriteLine("\nExecutive Suite {0} is {1} per night", room.RoomId.ToString(), room.Rate.ToString("C"));
Console.WriteLine("Current reservations are:");
foreach (var res in room.Reservations.OrderBy(r => r.StartDate))
{
Console.WriteLine("\t{0} thru {1} ({2})", res.StartDate.ToShortDateString(), res.EndDate.ToShortDateString(), res.ContactName);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
string hospital = "Oakland General";
var p1 = new Patient {
Name = "Robin Rosen", Age = 41
};
var p2 = new Patient {
Name = "Alex Jones", Age = 39
};
var p3 = new Patient {
Name = "Susan Kirby", Age = 54
};
var v1 = new PatientVisit {
Cost = 98.38M, Hospital = hospital, Patient = p1
};
var v2 = new PatientVisit {
Cost = 1122.98M, Hospital = hospital, Patient = p1
};
var v3 = new PatientVisit {
Cost = 2292.72M, Hospital = hospital, Patient = p2
};
var v4 = new PatientVisit {
Cost = 1145.73M, Hospital = hospital, Patient = p3
};
var v5 = new PatientVisit {
Cost = 2891.07M, Hospital = hospital, Patient = p3
};
context.Patients.AddObject(p1);
context.Patients.AddObject(p2);
context.Patients.AddObject(p3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Query using eSql...");
var esql = @"Select value ps from EFRecipesEntities.Patients as p join EFRecipesModel.GetVisitSummary() as ps on p.Name = ps.Name where p.Age > 40";
var patients = context.CreateQuery <VisitSummary>(esql);
foreach (var patient in patients)
{
Console.WriteLine("{0}, Visits: {1}, Total Bill: {2}",
patient.Name, patient.TotalVisits.ToString(), patient.TotalCost.ToString("C"));
}
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine();
Console.WriteLine("Query using LINQ...");
var patients = from p in context.Patients
join ps in context.GetVisitSummary() on p.Name equals ps.Name
where p.Age >= 40
select ps;
foreach (var patient in patients)
{
Console.WriteLine("{0}, Visits: {1}, Total Bill: {2}",
patient.Name, patient.TotalVisits.ToString(), patient.TotalCost.ToString("C"));
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
private static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var hotel = new Hotel {
Name = "Grand Seasons Hotel"
};
var r101 = new Room {
Rate = 79.95M, Hotel = hotel
};
var es201 = new ExecutiveSuite {
Rate = 179.95M, Hotel = hotel
};
var es301 = new ExecutiveSuite {
Rate = 299.95M, Hotel = hotel
};
var res1 = new Reservation
{
StartDate = DateTime.Parse("3/12/2010"),
EndDate = DateTime.Parse("3/14/2010"),
ContactName = "Roberta Jones",
Room = es301
};
var res2 = new Reservation
{
StartDate = DateTime.Parse("1/18/2010"),
EndDate = DateTime.Parse("1/28/2010"),
ContactName = "Bill Meyers",
Room = es301
};
var res3 = new Reservation
{
StartDate = DateTime.Parse("2/5/2010"),
EndDate = DateTime.Parse("2/6/2010"),
ContactName = "Robin Rosen",
Room = r101
};
es301.Reservations.Add(res1);
es301.Reservations.Add(res2);
r101.Reservations.Add(res3);
hotel.Rooms.Add(r101);
hotel.Rooms.Add(es201);
hotel.Rooms.Add(es301);
context.Hotels.Add(hotel);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// Assume we have an instance of hotel
var hotel = context.Hotels.First();
// Explicit loading with Load() provides opportunity to filter related data
// obtained from the Include() method
context.Entry(hotel)
.Collection(x => x.Rooms)
.Query()
.Include(y => y.Reservations)
.Where(y => y is ExecutiveSuite && y.Reservations.Any())
.Load();
Console.WriteLine("Executive Suites for {0} with reservations", hotel.Name);
foreach (var room in hotel.Rooms)
{
Console.WriteLine("\nExecutive Suite {0} is {1} per night", room.RoomId,
room.Rate.ToString("C"));
Console.WriteLine("Current reservations are:");
foreach (var res in room.Reservations.OrderBy(r => r.StartDate))
{
Console.WriteLine("\t{0} thru {1} ({2})", res.StartDate.ToShortDateString(),
res.EndDate.ToShortDateString(), res.ContactName);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}