static void Main(string[] args)
{
// STEP 5
Database.SetInitializer(new MigrateDatabaseToLatestVersion<StudentsDb, Configuration>());
var db = new StudentsDb();
//STEP 1
//for (int i = 0; i < 100; i++)
//{
// db.Students.Add(new Student
// {
// Name = "Pe6o" + i,
// City = new City()
// {
// Name = "Sofia" + i
// }
// });
//}
//// STEP 2
// makes 100 select queries
//foreach (var student in db.Students)
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City.Name);
//}
//// STEP 3
//// makes 1 select query
//foreach (var student in db.Students.Include("City"))
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City.Name);
//}
// STEP 4
// makes 1 select query too, but better
//var students = db.Students
// .Select(student => new
// {
// Name = student.Name,
// City = student.City.Name
// });
//foreach (var student in students)
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City);
//}
////// STEP 4 NEVER CALL ToList() to early
////var students2 = db.Students
//// .ToList()
//// .Select(student => new
//// {
//// Name = student.Name,
//// City = student.City.Name
//// });
////foreach (var student in students2)
////{
//// Console.WriteLine("{0} ({1})", student.Name, student.City);
////}
// STEP 5
//for (int i = 0; i < 10000; i++)
//{
// var student = new Student();
// student.Name ="Petar" + i.ToString();
// student.City = new City
// {
// Name = "City" + i
// };
// student.Picture = new byte[1000];
// db.Students.Add(student);
// Console.WriteLine(i);
//}
//// STEP 7 DEMO
//var stu = new Student { Name = "OK", City = new City { Name = "OK City" } };
//var badStudent = new Student { Name = "123456789012345678901234567890123456789012345678901234567890", City = new City { Name = "alabala" } };
//db.Students.Add(stu);
//db.Students.Add(badStudent);
////// STEP 8
//Stopwatch sw = new Stopwatch();
//sw.Start();
//var students2 = db.Students
// .ToList();
//foreach (var student in students2)
//{
// Console.WriteLine(student.Name);
//}
//Console.WriteLine(sw.Elapsed);
////// STEP 9
//Stopwatch sw = new Stopwatch();
//sw.Start();
//var students2 = db.Students
// .Select(student => new { student.Name })
// .ToList();
//foreach (var student in students2)
//{
// Console.WriteLine(student.Name);
//}
//Console.WriteLine(sw.Elapsed);
db.SaveChanges();
// STEP 10 DELETE
db.Database.ExecuteSqlCommand("DELETE FROM [Students] WHERE [Name] Like '%8';");
// STEP 11 USE Entity Framework Extention Library
}
static void Main(string[] args)
{
// STEP 5
Database.SetInitializer(new MigrateDatabaseToLatestVersion <StudentsDb, Configuration>());
var db = new StudentsDb();
//STEP 1
//for (int i = 0; i < 100; i++)
//{
// db.Students.Add(new Student
// {
// Name = "Pe6o" + i,
// City = new City()
// {
// Name = "Sofia" + i
// }
// });
//}
//// STEP 2
// makes 100 select queries
//foreach (var student in db.Students)
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City.Name);
//}
//// STEP 3
//// makes 1 select query
//foreach (var student in db.Students.Include("City"))
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City.Name);
//}
// STEP 4
// makes 1 select query too, but better
//var students = db.Students
// .Select(student => new
// {
// Name = student.Name,
// City = student.City.Name
// });
//foreach (var student in students)
//{
// Console.WriteLine("{0} ({1})", student.Name, student.City);
//}
////// STEP 4 NEVER CALL ToList() to early
////var students2 = db.Students
//// .ToList()
//// .Select(student => new
//// {
//// Name = student.Name,
//// City = student.City.Name
//// });
////foreach (var student in students2)
////{
//// Console.WriteLine("{0} ({1})", student.Name, student.City);
////}
// STEP 5
//for (int i = 0; i < 10000; i++)
//{
// var student = new Student();
// student.Name ="Petar" + i.ToString();
// student.City = new City
// {
// Name = "City" + i
// };
// student.Picture = new byte[1000];
// db.Students.Add(student);
// Console.WriteLine(i);
//}
//// STEP 7 DEMO
//var stu = new Student { Name = "OK", City = new City { Name = "OK City" } };
//var badStudent = new Student { Name = "123456789012345678901234567890123456789012345678901234567890", City = new City { Name = "alabala" } };
//db.Students.Add(stu);
//db.Students.Add(badStudent);
////// STEP 8
//Stopwatch sw = new Stopwatch();
//sw.Start();
//var students2 = db.Students
// .ToList();
//foreach (var student in students2)
//{
// Console.WriteLine(student.Name);
//}
//Console.WriteLine(sw.Elapsed);
////// STEP 9
//Stopwatch sw = new Stopwatch();
//sw.Start();
//var students2 = db.Students
// .Select(student => new { student.Name })
// .ToList();
//foreach (var student in students2)
//{
// Console.WriteLine(student.Name);
//}
//Console.WriteLine(sw.Elapsed);
db.SaveChanges();
// STEP 10 DELETE
db.Database.ExecuteSqlCommand("DELETE FROM [Students] WHERE [Name] Like '%8';");
// STEP 11 USE Entity Framework Extention Library
}
