Convert list <a> to list <b> using Linq C #

Question

How can I convert my list with the type "Face" (created by my database) to typ "myPerson" without receiving erros.

I tried this:

DataClasses1DataContext d = new 
DataClasses1DataContext(MainWindow.mySqlClass.GetConnection());

var query = from pers in d.Person select pers;

personen = query.ToList();
newPerson = personen.Cast<myPerson>().ToList();

But I only get System.InvalidCastException.

public partial class myPerson : Person
{
    public override string ToString()
    {
        return Name + " " + Nachname;
    }
    public myPerson(System.Data.Linq.EntitySet<Bilder> bilder, string geschlecht, int iD, string nachname, string name)
    {
        Bilder = bilder;
        Geschlecht = geschlecht;
        ID = iD;
        Nachname = nachname;
        Name = name;
    }
}

Class created by Linq (frist strings only):

public partial class Person : INotifyPropertyChanging, INotifyPropertyChanged
{

    private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);

    private int _ID;

    private string _Nachname;

    private string _Name;

    private string _Geschlecht;

    private EntitySet<Bilder> _Bilder;

Does anyone have an idea how I can convert a List from typ Person to a list with typ myPerson?

or how can I make a request that makes it possible to convert from Person to myPerson?

Answer 1

myPerson Person, myPerson Person. , Person myPerson, . , myPerson, , .

Person, myPerson, ( factory), Person ( ) myPerson.

public partial class myPerson : Person
{
    public myPerson(Person p)
    {
        _ID = p.Id;
        _Nachname = p.Nachname;
        _Name = p.Name;
        _Geschlecht = p.Geschlecht;
        _Bilder = p.Bilder;
    }

    private int _ID;
    private string _Nachname;
    private string _Name;
    private string _Geschlecht;
    private EntitySet<Bilder> _Bilder;
    // add properties
}

:

personen = query.ToList();
newPerson = personen.Select(p => new myPerson(p)).ToList();

Answer 2

var query = from pers in d.Person 
            select new myPerson 
                  {
                     Name = pers.Name,
                     ...
                  } ;

(...) , .

Answer 3

, .

, , . linq :

d.Person.Select(x => new myPerson(....)).ToList();

Person, myPerson List.

.... - ctor myPerson, Person myPerson, :

new myPerson(x.Bilder, x.Geschlecht, .......

, ctor myPerson, Person, ctor .

Answer 4

, this StackOverflow ?

Botz3000: "

ChildClassList = BaseClassList.Cast<ChildClass>().ToList();

null, BaseClass ChildClass. , :

ChildClassList = BaseClassList.Select(x => x as ChildClass).ToList();

But I would prefer this, including type checking, and skip elements that don't match:

ChildClassList = BaseClassList.OfType<ChildClass>().ToList();

"