static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var cd1 = context.CreateObject <CD>();
cd1.Title = "Abbey Road";
cd1.Tracks.Add(new Track {
Title = "Come Together", Artist = "The Beatles"
});
var cd2 = context.CreateObject <CD>();
cd2.Title = "Cowboy Town";
cd2.Tracks.Add(new Track {
Title = "Cowgirls Don't Cry", Artist = "Brooks & Dunn"
});
var cd3 = context.CreateObject <CD>();
cd3.Title = "Long Black Train";
cd3.Tracks.Add(new Track {
Title = "In My Dreams", Artist = "Josh Turner"
});
cd3.Tracks.Add(new Track {
Title = "Jacksonville", Artist = "Josh Turner"
});
context.CDs.AddObject(cd1);
context.CDs.AddObject(cd2);
context.CDs.AddObject(cd3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// trigger proxy generation
context.CreateProxyTypes(new Type[] { typeof(CD), typeof(Track) });
Console.WriteLine("{0} proxies generated!", EFRecipesEntities.GetKnownProxyTypes().Count());
var cds = context.CDs.Include("Tracks");
foreach (var cd in cds)
{
Console.WriteLine("Album: {0}", cd.Title);
foreach (var track in cd.Tracks)
{
Console.WriteLine("\t{0} by {1}", track.Title, track.Artist);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var w1 = new WebProduct {
Name = "Camping Tent", Description = "Family Camping Tent, Color Green"
};
var w2 = new WebProduct {
Name = "Chemical Light"
};
var w3 = new WebProduct {
Name = "Ground Cover", Description = "Blue ground cover"
};
context.WebProducts.AddObject(w1);
context.WebProducts.AddObject(w2);
context.WebProducts.AddObject(w3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Query using eSql...");
var esql = @"select value EFRecipesModel.Store.ISNULL(p.Description,p.Name)
from EFRecipesEntities.WebProducts as p";
var prods = context.CreateQuery <string>(esql);
foreach (var prod in prods)
{
Console.WriteLine("Product Description: {0}", prod);
}
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine();
Console.WriteLine("Query using LINQ...");
var prods = from p in context.WebProducts
select BuiltinFunctions.ISNULL(p.Description, p.Name);
foreach (var prod in prods)
{
Console.WriteLine(prod);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var teen = new Teen {
Name = "Steven Keller", Age = 17, Phone = "817 867-5309"
};
var adult = new Adult {
Name = "Margret Jones", Age = 53, Phone = "913 294-6059"
};
var senior = new Senior {
Name = "Roland Park", Age = 71, Phone = "816 353-4458"
};
context.Members.AddObject(teen);
context.Members.AddObject(adult);
context.Members.AddObject(senior);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Club Members");
Console.WriteLine("============");
foreach (var member in context.Members)
{
bool printPhone = true;
string str = string.Empty;
if (member is Teen)
{
str = " a Teen";
printPhone = false;
}
else if (member is Adult)
{
str = "an Adult";
}
else if (member is Senior)
{
str = "a Senior";
}
Console.WriteLine("{0} is {1} member, phone: {2}", member.Name, str, printPhone ? member.Phone : "unavailable");
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var name1 = new Name {
FirstName = "Robin", LastName = "Rosen"
};
var name2 = new Name {
FirstName = "Alex", LastName = "St. James"
};
var address1 = new Address {
AddressLine1 = "510 N. Grant", AddressLine2 = "Apt. 8", City = "Raytown", State = "MO", ZIPCode = "64133"
};
var address2 = new Address {
AddressLine1 = "222 Baker St.", AddressLine2 = "Apt.22B", City = "Raytown", State = "MO", ZIPCode = "64133"
};
context.Agents.AddObject(new Agent {
Name = name1, Address = address1
});
context.Agents.AddObject(new Agent {
Name = name2, Address = address2
});
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Agents");
foreach (var agent in context.Agents)
{
Console.WriteLine("{0} {1}", agent.Name.FirstName, agent.Name.LastName);
Console.WriteLine("{0}", agent.Address.AddressLine1);
Console.WriteLine("{0}", agent.Address.AddressLine2);
Console.WriteLine("{0}, {1} {2}", agent.Address.City, agent.Address.State, agent.Address.ZIPCode);
Console.WriteLine();
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var client1 = new Client {
Name = "Karen Standfield", ClientId = 1
};
var invoice1 = new Invoice {
InvoiceDate = DateTime.Parse("4/1/10"), Amount = 29.95M
};
var invoice2 = new Invoice {
InvoiceDate = DateTime.Parse("4/2/10"), Amount = 49.95M
};
var invoice3 = new Invoice {
InvoiceDate = DateTime.Parse("4/3/10"), Amount = 102.95M
};
var invoice4 = new Invoice {
InvoiceDate = DateTime.Parse("4/4/10"), Amount = 45.99M
};
// add the invoice
// to the client's collection
client1.Invoices.Add(invoice1);
// assign the foreign key
// directly
invoice2.ClientId = 1;
// Attach() and existing
// row using a "fake" entity
context.ExecuteStoreCommand("insert into chapter5.client values (2, 'Phil Marlowe')");
var client2 = new Client {
ClientId = 2
};
context.Clients.Attach(client2);
invoice3.Client = client2;
// using the ClientReference
invoice4.ClientReference.Value = client1;
// save the changes
context.Clients.AddObject(client1);
context.Invoices.AddObject(invoice2);
context.Invoices.AddObject(invoice3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
foreach (var client in context.Clients)
{
Console.WriteLine("Client: {0}", client.Name);
foreach (var invoice in client.Invoices)
{
Console.WriteLine("\t{0} for {1}", invoice.InvoiceDate.ToShortDateString(), invoice.Amount.ToString("C"));
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
private static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var doc1 = new Doctor {
Name = "Joan Meyers"
};
var doc2 = new Doctor {
Name = "Steven Mills"
};
var pat1 = new Patient {
Name = "Bill Rivers"
};
var pat2 = new Patient {
Name = "Susan Stevenson"
};
var pat3 = new Patient {
Name = "Roland Marcy"
};
var app1 = new Appointment
{
Date = DateTime.Today,
Doctor = doc1,
Fee = 109.92M,
Patient = pat1,
Reason = "Checkup"
};
var app2 = new Appointment
{
Date = DateTime.Today,
Doctor = doc2,
Fee = 129.87M,
Patient = pat2,
Reason = "Arm Pain"
};
var app3 = new Appointment
{
Date = DateTime.Today,
Doctor = doc1,
Fee = 99.23M,
Patient = pat3,
Reason = "Back Pain"
};
context.Appointments.Add(app1);
context.Appointments.Add(app2);
context.Appointments.Add(app3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// disable lazy-loading feature as we are explicitly loading
// child entities
context.Configuration.LazyLoadingEnabled = false;
var doctorJoan = context.Doctors.First(o => o.Name == "Joan Meyers");
if (!context.Entry(doctorJoan).Collection(x => x.Appointments).IsLoaded)
{
context.Entry(doctorJoan).Collection(x => x.Appointments).Load();
Console.WriteLine("Dr. {0}'s appointments were explicitly loaded.",
doctorJoan.Name);
}
Console.WriteLine("Dr. {0} has {1} appointment(s).",
doctorJoan.Name,
doctorJoan.Appointments.Count());
foreach (var appointment in context.Appointments)
{
if (!context.Entry(appointment).Reference(x => x.Doctor).IsLoaded)
{
context.Entry(appointment).Reference(x => x.Doctor).Load();
Console.WriteLine("Dr. {0} was explicitly loaded.",
appointment.Doctor.Name);
}
else
{
Console.WriteLine("Dr. {0} was already loaded.",
appointment.Doctor.Name);
}
}
Console.WriteLine("There are {0} appointments for Dr. {1}",
doctorJoan.Appointments.Count(),
doctorJoan.Name);
doctorJoan.Appointments.Clear();
Console.WriteLine("Collection clear()'ed");
Console.WriteLine("There are now {0} appointments for Dr. {1}",
doctorJoan.Appointments.Count(),
doctorJoan.Name);
context.Entry(doctorJoan).Collection(x => x.Appointments).Load();
Console.WriteLine("Collection loaded()'ed");
Console.WriteLine("There are now {0} appointments for Dr. {1}",
doctorJoan.Appointments.Count().ToString(),
doctorJoan.Name);
// Currently, there isn't an easy way to refresh entities with the DbContext API.
// Instead, drop-down into the ObjectContext and perform the following actions
var objectContext = ((IObjectContextAdapter)context).ObjectContext;
var objectSet = objectContext.CreateObjectSet <Appointment>();
objectSet.MergeOption = MergeOption.OverwriteChanges;
objectSet.Load();
Console.WriteLine("Collection loaded()'ed with MergeOption.OverwriteChanges");
Console.WriteLine("There are now {0} appointments for Dr. {1}",
doctorJoan.Appointments.Count(),
doctorJoan.Name);
}
// Demonstrating loading part of the collection then Load()'ing the rest
using (var context = new EFRecipesEntities())
{
// disable lazy-loading feature as we are explicitly loading
// child entities
context.Configuration.LazyLoadingEnabled = false;
// Load the first doctor and attach just the first appointment
var doctorJoan = context.Doctors.First(o => o.Name == "Joan Meyers");
context.Entry(doctorJoan).Collection(x => x.Appointments).Query().Take(1).Load();
// note that IsLoaded returns false here since all related data has not been loaded into the context
var appointmentsLoaded = context.Entry(doctorJoan).Collection(x => x.Appointments).IsLoaded;
Console.WriteLine("Dr. {0} has {1} appointments loaded.",
doctorJoan.Name,
doctorJoan.Appointments.Count());
// When we need all of the remaining appointments, simply Load() them
context.Entry(doctorJoan).Collection(x => x.Appointments).Load();
Console.WriteLine("Dr. {0} has {1} appointments loaded.",
doctorJoan.Name,
doctorJoan.Appointments.Count());
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var p1 = new Product {
Name = "Trailrunner Backpack"
};
var p2 = new Product {
Name = "Green River Tent", TopSelling = new TopSelling {
Rating = 3
}
};
var p3 = new Product {
Name = "Prairie Home Dutch Oven", TopSelling = new TopSelling {
Rating = 4
}
};
var p4 = new Product {
Name = "QuickFire Fire Starter", TopSelling = new TopSelling {
Rating = 2
}
};
context.Products.AddObject(p1);
context.Products.AddObject(p2);
context.Products.AddObject(p3);
context.Products.AddObject(p4);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
var products = from p in context.Products
orderby p.TopSelling.Rating descending
select p;
Console.WriteLine("Top selling products sorted by rating");
foreach (var product in products)
{
if (product.TopSelling != null)
{
Console.WriteLine("\t{0} [rating: {1}]", product.Name, product.TopSelling.Rating.ToString());
}
}
}
using (var context = new EFRecipesEntities())
{
var products = from p in context.Products
join t in context.TopSellings on p.ProductId equals t.ProductId into g
from tps in g.DefaultIfEmpty()
orderby tps.Rating descending
select new
{
Name = p.Name,
Rating = tps.Rating == null ? 0 : tps.Rating
};
Console.WriteLine("\nTop selling products sorted by rating");
foreach (var product in products)
{
if (product.Rating != 0)
{
Console.WriteLine("\t{0} [rating: {1}]", product.Name, product.Rating.ToString());
}
}
}
using (var context = new EFRecipesEntities())
{
var esql = @"select value p from products as p
order by case when p.TopSelling is null then 0
else p.TopSelling.Rating end desc";
var products = context.CreateQuery <Product>(esql);
Console.WriteLine("\nTop selling products sorted by rating");
foreach (var product in products)
{
if (product.TopSelling != null)
{
Console.WriteLine("\t{0} [rating: {1}]", product.Name, product.TopSelling.Rating.ToString());
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
// bad order date
using (var context = new EFRecipesEntities())
{
var customer = new Customer {
Name = "Phil Marlowe"
};
var order = new SalesOrder {
OrderDate = DateTime.Parse("3/12/18"), Amount = 19.95M, Status = "Approved", ShippingCharge = 3.95M, Customer = customer
};
context.Customers.AddObject(customer);
try
{
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// order shipped before it was ordered
using (var context = new EFRecipesEntities())
{
var customer = new Customer {
Name = "Phil Marlowe"
};
var order = new SalesOrder {
OrderDate = DateTime.Parse("3/12/10"), Amount = 19.95M, Status = "Approved", ShippingCharge = 3.95M, Customer = customer
};
context.Customers.AddObject(customer);
context.SaveChanges();
try
{
order.Shipped = true;
order.ShippedDate = DateTime.Parse("3/10/10");
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// order shipped, but not approved
using (var context = new EFRecipesEntities())
{
var customer = new Customer {
Name = "Phil Marlowe"
};
var order = new SalesOrder {
OrderDate = DateTime.Parse("3/12/10"), Amount = 19.95M, Status = "Pending", ShippingCharge = 3.95M, Customer = customer
};
context.Customers.AddObject(customer);
context.SaveChanges();
try
{
order.Shipped = true;
order.ShippedDate = DateTime.Parse("3/13/10");
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// order over $5,000 and shipping not free
using (var context = new EFRecipesEntities())
{
var customer = new Customer {
Name = "Phil Marlowe"
};
var order = new SalesOrder {
OrderDate = DateTime.Parse("3/12/10"), Amount = 6200M, Status = "Approved", ShippingCharge = 59.95M, Customer = customer
};
context.Customers.AddObject(customer);
context.SaveChanges();
try
{
order.Shipped = true;
order.ShippedDate = DateTime.Parse("3/13/10");
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// order deleted after it was shipped
using (var context = new EFRecipesEntities())
{
var customer = new Customer {
Name = "Phil Marlowe"
};
var order = new SalesOrder {
OrderDate = DateTime.Parse("3/12/10"), Amount = 19.95M, Status = "Approved", ShippingCharge = 3.95M, Customer = customer
};
context.Customers.AddObject(customer);
context.SaveChanges();
order.Shipped = true;
order.ShippedDate = DateTime.Parse("3/13/10");
context.SaveChanges();
try
{
context.DeleteObject(order);
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}