I ask about the new C#9-feature "init property setter". Below an example of it:
public class MyClass
{
public int Id { get; init; }
public int Name { get; init; }
public int Position { get; init; }
}
My question is how I can update the value of 'Position' after initialize. I want something like this:
public class MyClass
{
public int Id { get; init; }
public int Name { get; init; }
public int Position { get; init + private set; }
public void MoveMyClass(int newPositionIndex)
{
// Some business code...
Position = newPositionIndex;
}
}
In my real world project an instance of MyClass is initialized by entity framework. Then I call some business methods on it. The rule is that only business methods are allowed to set values on properties, so I want at least private setters. But if I have private setters then entity framework cannot initialize the properties.
It seems that this feature is not available for auto-properties in C#9.
To solve this issue I combine init with the full property style (instead auto property). Maybee C#10 or later would support such an access modifier.
public class MyClass
{
private int _position;
public int Id { get; init; }
public int Name { get; init; }
public int Position { get => _position; init => _position = value; }
public void MoveMyClass(int newPositionIndex)
{
// Some business code...
_position = newPositionIndex;
}
}