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Replicate a class from an assempli and add a new constructor

PozzaVecia7-Nov-12 11:45

7-Nov-12 11:45

I need to crate a new class which replicate a class in a given assembly but adding also a new constructor and adding new methods. Is it possible?

Re: Replicate a class from an assempli and add a new constructor

Mycroft Holmes7-Nov-12 13:07

Mycroft Holmes

7-Nov-12 13:07

Yes, it's called inheritance and is a cornerstone of OOP.

Never underestimate the power of human stupidity
RAH

Re: Replicate a class from an assempli and add a new constructor

DaveyM697-Nov-12 18:42

DaveyM69

7-Nov-12 18:42

If the class is a class (and not a struct) and isn't sealed then you can inherit from it:

public class YourClass : OriginalClass
{
    // Recreate the constructors as they aren't inherited
    public YourClass(...) : base(...)
    { }

    // Add whatever you want...
}

If it's a struct or a sealed class then you will need to create a wrapper and replicate all the constructors/properties/methods etc you require:

public WrapperClass
{
    private WrappedType value;

    public WrapperClass(...)
    {
        value = new WrappedType(...);
    }

    public void DoSomething()
    {
        value.DoSomething();
    }

    // Add whatever you want...
}

Dave

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Re: Replicate a class from an assempli and add a new constructor

PozzaVecia7-Nov-12 22:41

PozzaVecia

7-Nov-12 22:41

in may case the base class have not a parameterless constructor, while in the derived I need this one.

Is it possible to istantiate the base class in later mathod?

Re: Replicate a class from an assempli and add a new constructor

DaveyM698-Nov-12 18:39

DaveyM69

8-Nov-12 18:39

Not by using inheritance - you would need to use a wrapper as in my second snippet, the base would stay null until instanciated.

Re: Replicate a class from an assempli and add a new constructor

Andy4118-Nov-12 20:53

Andy411

8-Nov-12 20:53

You cannot do it later in a method, but if you know the parameters, you can do it like this:

class BaseClass
{
    public BaseClass(int theParam)
    {
    }
}


class DerivedClass : BaseClass
{
    public DerivedClass() : base(4711)
    {
    }
}

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