static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var tech1 = new Technician {
Name = "Julie Kerns"
};
var tech2 = new Technician {
Name = "Robert Allison"
};
context.ServiceCalls.AddObject(new ServiceCall {
ContactName = "Robin Rosen", Issue = "Can't get satellite signal.", Technician = tech1
});
context.ServiceCalls.AddObject(new ServiceCall {
ContactName = "Phillip Marlowe", Issue = "Channel not available", Technician = tech2
});
// now get the entities we've added
foreach (var tech in context.ObjectStateManager.GetEntities <Technician>())
{
Console.WriteLine("Technician: {0}", tech.Name);
foreach (var call in tech.ServiceCalls)
{
Console.WriteLine("\tService Call: Contact {0} about {1}", call.ContactName, call.Issue);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter13.reservation");
}
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter6.category");
}
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var donation = context.CreateObject <Donation>();
donation.Amount = 5000M;
var donor1 = context.CreateObject <Donor>();
donor1.Name = "Jill Rosenberg";
var donor2 = context.CreateObject <Donor>();
donor2.Name = "Robert Hewitt";
// give Jill the credit for the donation and save
donor1.Donations.Add(donation);
context.Donors.AddObject(donor1);
context.Donors.AddObject(donor2);
context.SaveChanges();
// now give Robert the credit
donation.Donor = donor2;
// report
foreach (var donor in context.Donors)
{
Console.WriteLine("{0} has given {1} donation(s)", donor.Name, donor.Donations.Count().ToString());
}
var entry = context.ObjectStateManager.GetObjectStateEntry(donation);
Console.WriteLine("Original Donor Id: {0}", entry.OriginalValues["DonorId"]);
Console.WriteLine("Current Donor Id: {0}", entry.CurrentValues["DonorId"]);
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var course1 = new Course {
CourseName = "CS 301"
};
var course2 = new Course {
CourseName = "Math 455"
};
var en1 = new Enrollment {
Student = "James Folk"
};
var en2 = new Enrollment {
Student = "Scott Shores"
};
var en3 = new Enrollment {
Student = "Jill Glass"
};
var en4 = new Enrollment {
Student = "Robin Rosen"
};
var class1 = new Class {
Instructor = "Bill Meyers"
};
var class2 = new Class {
Instructor = "Norma Hall"
};
class1.Course = course1;
class2.Course = course2;
class1.Enrollments.Add(en1);
class1.Enrollments.Add(en2);
class2.Enrollments.Add(en3);
class2.Enrollments.Add(en4);
context.Classes.AddObject(class1);
context.Classes.AddObject(class2);
context.SaveChanges();
context.Classes.DeleteObject(class1);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
foreach (var course in context.Courses)
{
Console.WriteLine("Course: {0}", course.CourseName);
foreach (var c in course.Classes)
{
Console.WriteLine("\tClass: {0}, Instructor: {1}", c.ClassId.ToString(), c.Instructor);
foreach (var en in c.Enrollments)
{
Console.WriteLine("\t\tStudent: {0}", en.Student);
}
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter3.comment");
context.ExecuteStoreCommand("delete from chapter3.blogpost");
}
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter15.invoice");
context.ExecuteStoreCommand("delete from chapter15.client");
}
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter7.servicecall");
context.ExecuteStoreCommand("delete from chapter7.technician");
}
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter10.message");
context.ExecuteStoreCommand("delete from chapter10.member");
}
}
static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.ExecuteStoreCommand("delete from chapter5.employee");
context.ExecuteStoreCommand("delete from chapter5.department");
context.ExecuteStoreCommand("delete from chapter5.company");
}
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var hotel = new Hotel {
Name = "Five Seasons Resort"
};
var v1 = new Visitor {
Name = "Alex Stevens"
};
var v2 = new Visitor {
Name = "Joan Hills"
};
var r1 = new Reservation {
Cost = 79.99M, Hotel = hotel, ReservationDate = DateTime.Parse("2/19/2010"), Visitor = v1
};
var r2 = new Reservation {
Cost = 99.99M, Hotel = hotel, ReservationDate = DateTime.Parse("2/17/2010"), Visitor = v2
};
var r3 = new Reservation {
Cost = 109.99M, Hotel = hotel, ReservationDate = DateTime.Parse("2/18/2010"), Visitor = v1
};
var r4 = new Reservation {
Cost = 89.99M, Hotel = hotel, ReservationDate = DateTime.Parse("2/17/2010"), Visitor = v2
};
context.Hotels.AddObject(hotel);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Using eSql...");
var esql = @"Select value v from EFRecipesModel.VisitorSummary(DATETIME'2010-02-16 00:00', 7) as v";
var visitors = context.CreateQuery <DbDataRecord>(esql);
foreach (var visitor in visitors)
{
Console.WriteLine("{0}, Total Reservations: {1}, Revenue: {2:C}",
visitor["Name"], visitor["TotalReservations"], visitor["BusinessEarned"]);
}
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine();
Console.WriteLine("Using LINQ...");
var visitors = from v in context.VisitorSummary(DateTime.Parse("2/16/2010"), 7)
select v;
foreach (var visitor in visitors)
{
Console.WriteLine("{0}, Total Reservations: {1}, Revenue: {2:C}",
visitor["Name"], visitor["TotalReservations"], visitor["BusinessEarned"]);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
private static void Cleanup()
{
using (var context = new EFRecipesEntities())
{
context.Database.ExecuteSqlCommand("delete from chapter5.sectionstudent");
context.Database.ExecuteSqlCommand("delete from chapter5.section");
context.Database.ExecuteSqlCommand("delete from chapter5.student");
context.Database.ExecuteSqlCommand("delete from chapter5.course");
context.Database.ExecuteSqlCommand("delete from chapter5.instructor");
}
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
context.Reservations.AddObject(new Reservation {
Name = "James Jordan", ResDate = DateTime.Parse("4/18/10")
});
context.Reservations.AddObject(new Reservation {
Name = "Katie Marlowe", ResDate = DateTime.Parse("3/22/10")
});
context.Reservations.AddObject(new Reservation {
Name = "Roger Smith", ResDate = DateTime.Parse("4/18/10")
});
context.Reservations.AddObject(new Reservation {
Name = "James Jordan", ResDate = DateTime.Parse("5/12/10")
});
context.Reservations.AddObject(new Reservation {
Name = "James Jordan", ResDate = DateTime.Parse("6/22/10")
});
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
DateTime?searchDate = null;
string searchName = "James Jordan";
Console.WriteLine("More complex SQL...");
var query2 = from reservation in context.Reservations
let dateMatches = searchDate == null || reservation.ResDate == searchDate
let nameMatches = searchName == string.Empty || reservation.Name.Contains(searchName)
where dateMatches && nameMatches
select reservation;
foreach (var reservation in query2)
{
Console.WriteLine("Found reservation for {0} on {1}", reservation.Name, reservation.ResDate.ToShortDateString());
}
Console.WriteLine("Cleaner SQL...");
var query1 = from reservation in context.Reservations
where (searchDate == null || reservation.ResDate == searchDate)
&&
(searchName == string.Empty || reservation.Name.Contains(searchName))
select reservation;
foreach (var reservation in query1)
{
Console.WriteLine("Found reservation for {0} on {1}", reservation.Name, reservation.ResDate.ToShortDateString());
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var company = new Company {
Name = "Acme Products"
};
var acc = new Department {
Name = "Accounting", Company = company
};
var ship = new Department {
Name = "Shipping", Company = company
};
var emp1 = new Employee {
Name = "Jill Carpenter", Department = acc
};
var emp2 = new Employee {
Name = "Steven Hill", Department = ship
};
context.Employees.AddObject(emp1);
context.Employees.AddObject(emp2);
context.SaveChanges();
}
// first approach
using (var context = new EFRecipesEntities())
{
// assume we already have an employee
var jill = context.Employees.Where(o => o.Name == "Jill Carpenter").First();
// now get Jill's department and company
var results = context.Employees.Include("Department.Company").Where(o => o.EmployeeId == jill.EmployeeId).First <Employee>();
Console.WriteLine("{0} works in {1} for {2}", jill.Name, jill.Department.Name, jill.Department.Company.Name);
}
// more efficient, does not retrieve employee again
using (var context = new EFRecipesEntities())
{
// assume we already have an employee
var jill = context.Employees.Where(o => o.Name == "Jill Carpenter").First();
var moreResults = jill.DepartmentReference.CreateSourceQuery().Include("Company").First();
context.Attach(moreResults);
Console.WriteLine("{0} works in {1} for {2}", jill.Name, jill.Department.Name, jill.Department.Company.Name);
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
// Note: This is the non-MEST code version. If you use MEST, change
// context.Audits.AddObject() to context.Clients.AddObject() and
// context.Invoices.AddObject() because these entities are now in their
// own entity sets.
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var c1 = new Client {
Name = "Joanne Wise"
};
var c2 = new Client {
Name = "Robert Marr"
};
var c3 = new Client {
Name = "Shelly King"
};
var i1 = new Invoice {
Amount = 99.23M
};
var i2 = new Invoice {
Amount = 29.95M
};
c1.Invoices.Add(i1);
c3.Invoices.Add(i2);
context.Audits.AddObject(c1);
context.Audits.AddObject(c2);
context.Audits.AddObject(c3);
context.SaveChanges();
Console.WriteLine("Waiting 10 seconds to update...");
System.Threading.Thread.Sleep(10 * 1000);
i1.Amount = 98.49M;
i2.Amount = 39.99M;
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
context.ContextOptions.LazyLoadingEnabled = true;
Console.WriteLine("Invoices...");
foreach (var bill in context.Audits.OfType <Invoice>())
{
Console.WriteLine("{0} Amount: {1}", bill.Client.Name, bill.Amount.ToString("C"));
Console.WriteLine("\tCreated: {0}", bill.CreateDate.ToLongTimeString());
Console.WriteLine("\tLast Modified: {0}\n", bill.ModifiedDate.ToLongTimeString());
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var louvre = new PictureCategory {
Name = "Louvre"
};
var child = new PictureCategory {
Name = "Egyptian Antiquites"
};
louvre.Subcategories.Add(child);
child = new PictureCategory {
Name = "Sculptures"
};
louvre.Subcategories.Add(child);
child = new PictureCategory {
Name = "Paintings"
};
louvre.Subcategories.Add(child);
var paris = new PictureCategory {
Name = "Paris"
};
paris.Subcategories.Add(louvre);
var vacation = new PictureCategory {
Name = "Summer Vacation"
};
vacation.Subcategories.Add(paris);
context.PictureCategories.AddObject(paris);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
context.ContextOptions.LazyLoadingEnabled = true;
PictureCategory root = (from c in context.PictureCategories
where c.ParentCategory == null
select c).FirstOrDefault();
Print(root, 0);
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
DateTime today = DateTime.Parse("4/18/2010");
using (var context = new EFRecipesEntities())
{
var mem1 = new Member {
Name = "Jill Robertson"
};
var mem2 = new Member {
Name = "Steven Rhodes"
};
mem1.Messages.Add(new Message {
DateSent = today, MessageBody = "Hello Jim", Subject = "Hello"
});
mem1.Messages.Add(new Message {
DateSent = today, MessageBody = "Wonderful weather!", Subject = "Weather"
});
mem1.Messages.Add(new Message {
DateSent = today, MessageBody = "Meet me for lunch", Subject = "Lunch plans"
});
mem2.Messages.Add(new Message {
DateSent = today, MessageBody = "Going to class today?", Subject = "What's up?"
});
context.Members.AddObject(mem1);
context.Members.AddObject(mem2);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Members by message count for {0}", today.ToShortDateString());
var members = context.MembersWithTheMostMessages(today);
foreach (var member in members)
{
Console.WriteLine("Member: {0}", member.Name);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
context.Accounts.AddObject(new Account {
AccountNumber = "8675309", Balance = 100M, Name = "Robin Rosen"
});
context.Accounts.AddObject(new Account {
AccountNumber = "8535937", Balance = 25M, Name = "Steven Bishop"
});
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
// get the account
var account = context.Accounts.First(a => a.AccountNumber == "8675309");
Console.WriteLine("Account for {0}", account.Name);
Console.WriteLine("\tPrevious Balance: {0}", account.Balance.ToString("C"));
// some other process updates the balance
Console.WriteLine("[Rogue process updates balance!]");
context.ExecuteStoreCommand("update chapter14.account set balance = 1000 where accountnumber = '8675309'");
// update the account balance
account.Balance = 10M;
try
{
Console.WriteLine("\tNew Balance: {0}", account.Balance.ToString("C"));
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 book = new Category {
Name = "Books"
};
var fiction = new Category {
Name = "Fiction", ParentCategory = book
};
var nonfiction = new Category {
Name = "Non-Fiction", ParentCategory = book
};
var novel = new Category {
Name = "Novel", ParentCategory = fiction
};
var history = new Category {
Name = "History", ParentCategory = nonfiction
};
context.Categories.AddObject(book);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
var root = context.Categories.Where(o => o.Name == "Books").First();
Console.WriteLine("Parent category is {0}, subcategories are:", root.Name);
foreach (var sub in context.GetSubCategories(root.CategoryId))
{
Console.WriteLine("\t{0}", sub.Name);
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var post1 = new BlogPost {
Title = "The Joy of LINQ", Description = "101 things you always wanted to know about LINQ"
};
var post2 = new BlogPost {
Title = "LINQ as Dinner Conversation", Description = "What wine goes with a Lambda expression?"
};
var post3 = new BlogPost {
Title = "LINQ and our Children", Description = "Why we need to teach LINQ in High School"
};
var comment1 = new Comment {
Comments = "Great post, I wish more people would talk about LINQ"
};
var comment2 = new Comment {
Comments = "You're right, we should teach LINQ in high school!"
};
post1.Comments.Add(comment1);
post3.Comments.Add(comment2);
context.BlogPosts.AddObject(post1);
context.BlogPosts.AddObject(post2);
context.BlogPosts.AddObject(post3);
context.SaveChanges();
}
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Blog Posts with comments...(LINQ)");
var posts = from post in context.BlogPosts
where post.Comments.Any()
select post;
foreach (var post in posts)
{
Console.WriteLine("Blog Post: {0}", post.Title);
foreach (var comment in post.Comments)
{
Console.WriteLine("\t{0}", comment.Comments);
}
}
}
Console.WriteLine();
using (var context = new EFRecipesEntities())
{
Console.WriteLine("Blog Posts with comments...(ESQL)");
var esql = "select value p from BlogPosts as p where exists(p.Comments)";
var posts = context.CreateQuery <BlogPost>(esql);
foreach (var post in posts)
{
Console.WriteLine("Blog Post: {0}", post.Title);
foreach (var comment in post.Comments)
{
Console.WriteLine("\t{0}", comment.Comments);
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
private static void RunExample()
{
using (var context = new EFRecipesEntities())
{
var course = new Course {
Title = "Biology 101"
};
var fred = new Instructor {
Name = "Fred Jones"
};
var julia = new Instructor {
Name = "Julia Canfield"
};
var section1 = new Section {
Course = course, Instructor = fred
};
var section2 = new Section {
Course = course, Instructor = julia
};
var jim = new Student {
Name = "Jim Roberts"
};
jim.Sections.Add(section1);
var jerry = new Student {
Name = "Jerry Jones"
};
jerry.Sections.Add(section2);
var susan = new Student {
Name = "Susan O'Reilly"
};
susan.Sections.Add(section1);
var cathy = new Student {
Name = "Cathy Ryan"
};
cathy.Sections.Add(section2);
course.Sections.Add(section1);
course.Sections.Add(section2);
context.Students.Add(jim);
context.Students.Add(jerry);
context.Students.Add(susan);
context.Students.Add(cathy);
context.Courses.Add(course);
context.SaveChanges();
}
// String query path argument for the Include method
using (var context = new EFRecipesEntities())
{
var graph = context.Courses
.Include("Sections.Instructor")
.Include("Sections.Students");
Console.WriteLine("Courses");
Console.WriteLine("=======");
foreach (var course in graph)
{
Console.WriteLine("{0}", course.Title);
foreach (var section in course.Sections)
{
Console.WriteLine("\tSection: {0}, Instrutor: {1}", section.SectionId, section.Instructor.Name);
Console.WriteLine("\tStudents:");
foreach (var student in section.Students)
{
Console.WriteLine("\t\t{0}", student.Name);
}
Console.WriteLine("\n");
}
}
}
// Strongly-typed query path argument for the Include method
using (var context = new EFRecipesEntities())
{
var graph = context.Courses
.Include(x => x.Sections.Select(y => y.Instructor))
.Include(x => x.Sections.Select(z => z.Students));
Console.WriteLine("Courses");
Console.WriteLine("=======");
foreach (var course in graph)
{
Console.WriteLine("{0}", course.Title);
foreach (var section in course.Sections)
{
Console.WriteLine("\tSection: {0}, Instrutor: {1}", section.SectionId, section.Instructor.Name);
Console.WriteLine("\tStudents:");
foreach (var student in section.Students)
{
Console.WriteLine("\t\t{0}", student.Name);
}
Console.WriteLine("\n");
}
}
}
Console.WriteLine("Press <enter> to continue...");
Console.ReadLine();
}
protected void Page_Load(object sender, EventArgs e)
{
using (var context = new EFRecipesEntities())
{
// cleanup from previous tests
context.ExecuteStoreCommand("delete from chapter4.productdetail");
context.ExecuteStoreCommand("delete from chapter4.orderdetail");
context.ExecuteStoreCommand("delete from chapter4.product");
context.ExecuteStoreCommand("delete from chapter4.category");
context.ExecuteStoreCommand("delete from chapter4.supplier");
// add in our test data
var s1 = new Supplier {
CompanyName = "Backcountry Supply", Country = "USA"
};
var s2 = new Supplier {
CompanyName = "Alpine Tent", Country = "Italy"
};
var s3 = new Supplier {
CompanyName = "Ace Footware", Country = "USA"
};
var c1 = new Category {
CategoryName = "Tents"
};
var c2 = new Category {
CategoryName = "Shoes/Boots"
};
var pd1 = new ProductDetail {
UnitPrice = 99.95M
};
var pd2 = new ProductDetail {
UnitPrice = 129.95M
};
var pd3 = new ProductDetail {
UnitPrice = 39.95M
};
var p1 = new Product {
ProductName = "Pup Tent", ProductDescription = "Small and packable tent", Discontinued = true, UnitsInStock = 4
};
var p2 = new Product {
ProductName = "Trail Boot", ProductDescription = "Perfect boot for hiking", Discontinued = false, UnitsInStock = 19
};
var p3 = new Product {
ProductName = "Family Tent", ProductDescription = "Sleeps 2 adults + 2 children", Discontinued = false, UnitsInStock = 10
};
var od1 = new OrderDetail {
UnitPrice = 39.95M, Quantity = 1
};
var od2 = new OrderDetail {
UnitPrice = 129.95M, Quantity = 2
};
var od3 = new OrderDetail {
UnitPrice = 99.95M, Quantity = 1
};
p1.Supplier = s2;
p1.Category = c1;
p1.ProductDetail = pd3;
p1.OrderDetails.Add(od1);
p2.Supplier = s3;
p2.Category = c2;
p2.OrderDetails.Add(od2);
p2.ProductDetail = pd2;
p3.Supplier = s1;
p3.Category = c1;
p3.ProductDetail = pd1;
p3.OrderDetails.Add(od3);
context.Products.AddObject(p1);
context.Products.AddObject(p2);
context.Products.AddObject(p3);
context.SaveChanges();
}
}