public void Deconstruct()
{
var person = new PersonP("Bill", "Wagner");
var(lastName, firstName) = person;
Equal(lastName, "Bill");
Equal(firstName, "Wagner");
}
public void WithExpression()
{
var person = new PersonP("Bill", "Wagner");
var person2 = person with {
FirstName = "Thomas"
};
Equal(person2.FirstName, "Thomas");
Equal(person2.LastName, "Wagner");
var personClone = person with {
};
Equal(person, personClone);
NotStrictEqual(person, personClone);
}
private void Btn_Employee_Add(object sender, RoutedEventArgs e)
{
Person person;
switch (SelectedMain)
{
case Firma f:
person = new PersonF()
{
PartOf = f
};
f.Employee.Add((PersonF)person);
break;
case Divizia d:
person = new PersonD()
{
PartOf = d
};
d.Employee.Add((PersonD)person);
break;
case Projekt p:
person = new PersonP()
{
PartOf = p
};
p.Employee.Add((PersonP)person);
break;
case Oddelenie o:
person = new PersonO()
{
PartOf = o
};
o.Employee.Add((PersonO)person);
break;
default:
throw new ArgumentOutOfRangeException();
}
_db.SaveChanges();
_mainWindow.Show(person);
}
public static void RunTypeСonversions()
{
//Object obj = new Object();
//Boolean b1 = (obj is Object);
//проверяем, является ли переменная person объектом типа Employee(нет)
PersonP person = new PersonP();
//1 (никогда не генерирует исключения{только null})
Employee employee = person as Employee;
if (employee == null)
{
Console.WriteLine("No :-(");
}
else
{
Console.WriteLine("Yes :-)");
}
//2
try
{
employee = (Employee)person;
Console.WriteLine("Yes :-)");
}
catch (InvalidCastException ex)
{
Console.WriteLine(ex.Message);
}
//3 (true/false)
if (person is Employee)
{
employee = (Employee)person;
Console.WriteLine("Yes :-)");
}
else
{
Console.WriteLine("преобразование недопустимо");
}
}
