static void Main(string[] args)
{
using (var context = new SchoolEntities())
{
var query = from p in context.People.ToList()
where IsValid(p.FirstName)
select p.FirstName + " " + p.LastName;
//Console.WriteLine(query);
//foreach (var p in query)
//{
// Console.WriteLine(p);
//}
foreach (var person in context
.People
.OfType<Student>()
.Include(p =>
p.Grades.Select(g => g.Course)))
{
Console.WriteLine(person.FirstName);
foreach (var grade in person.Grades)
{
Console.WriteLine(" {1}: {0}", grade.Grade, grade.Course.Name);
}
}
}
}
static void Main(string[] args)
{
var sw = Stopwatch.StartNew();
using (var conn = new SqlConnection("Data Source=.;Initial Catalog=School;Integrated Security=SSPI"))
using (var comm = new SqlCommand("SELECT FirstName, LastName FROM Person WHERE FirstName = 'Peggy'", conn))
{
conn.Open();
sw.Restart();
var reader = comm.ExecuteReader();
while (reader.Read())
{
Console.WriteLine(reader[0] + " " + reader[1]);
}
Console.WriteLine(sw.Elapsed);
}
using (var entities = new SchoolEntities())
{
sw.Restart();
var query = from p in entities.People
where p.FirstName == "Peggy"
select p.FirstName + " " + p.LastNogWatName;
foreach (var name in query)
{
Console.WriteLine(name);
}
Console.WriteLine(sw.Elapsed);
sw.Restart();
var query2 = from p in entities.People
where p.FirstName == "Peggy"
select p.FirstName + " " + p.LastNogWatName;
foreach (var name in query2)
{
Console.WriteLine(name);
}
Console.WriteLine(sw.Elapsed);
}
}
private async void button1_Click(object sender, EventArgs e)
{
button1.Enabled = false;
using (new TransactionScope())
using (var context = new SchoolEntities())
{
await Task.Run(() => context.People.AddRange(Enumerable.Range(0, 10000).Select(i => new Student { FirstName = "Student" + i, EnrollmentDate = DateTime.Today })));
try
{
await context.SaveChangesAsync();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
button1.Enabled = true;
}