.net does not allow partial interface implementation in base classes. As a mitigation I've come to 3 alternate solutions. Please help me decide which is more universal in terms of refactoring, compile/run time errors, readability. But first a couple of comments.
My comparison:
public interface IFoo
{
void Method1();
void Method2();
}
public abstract class BaseClass1 : IFoo
{
void IFoo.Method1()
{
//some implementation
}
void IFoo.Method2()
{
IFooMethod2();
}
protected abstract void IFooMethod2();
}
public class MyClass1 : BaseClass1
{
[Obsolete("Prohibited direct call from child classes. only inteface implementation")]
protected override void IFooMethod2()
{
//some implementation
}
}
public abstract class BaseClass2 : IFoo
{
void IFoo.Method1()
{
//some implementation
}
[Obsolete("Prohibited direct call from child classes. only inteface implementation")]
public virtual void Method2()
{
throw new NotSupportedException();
}
}
public abstract class MyClass2 : BaseClass2
{
public override void Method2()
{
//some implementation
}
}
public abstract class BaseClass3 : IFoo
{
void IFoo.Method1()
{
//some implementation
}
void IFoo.Method2()
{
throw new NotSupportedException();
}
}
public abstract class MyClass3 : BaseClass3, IFoo
{
void IFoo.Method2()
{
//some implementation
}
}
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In the real sense it has no meaning or full form. It was developed by Dennis Ritchie and Ken Thompson at AT&T bell Lab. First, they used to call it as B language then later they made some improvement into it and renamed it as C and its superscript as C++ which was invented by Dr. Stroustroupe.
C is a general-purpose language that most programmers learn before moving on to more complex languages. From Unix and Windows to Tic Tac Toe and Photoshop, several of the most commonly used applications today have been built on C. It is easy to learn because: A simple syntax with only 32 keywords.
The letter c was applied by French orthographists in the 12th century to represent the sound ts in English, and this sound developed into the simpler sibilant s.
I like this version, the base class can't be instantiated because its abstract, the derived class must list IFoo in its declaration or else it won't be implementing the interface and then it is solely responsible for implementing the rest of the interface. One drawback I can see is you can't explicitly implement the interface methods in the base class (ie no IFoo:Method1), but otherwise this is a fairly low overhead version.
public interface IFoo
{
void Method1();
void Method2();
}
public abstract class BaseClass1
{
public void Method1()
{
//some implementation
}
}
public class MyClass1 : BaseClass1, IFoo
{
public void Method2()
{
//some implementation
}
}
Ok, you could try the following as BaseClass
is abstract:
public interface IFoo
{
void Method1();
void Method2();
}
public abstract class BaseClass : IFoo
{
public void Method1()
{
// Common stuff for all BaseClassX classes
}
// Abstract method: it ensures IFoo is fully implemented
// by all classes that inherit from BaseClass, but doesn't provide
// any implementation right here.
public abstract void Method2();
}
public class MyClass1 : BaseClass
{
public override void Method2()
{
// Specific stuff for MyClass1
Console.WriteLine("Class1");
}
}
public class MyClass2 : BaseClass
{
public override void Method2()
{
// Specific stuff for MyClass2
Console.WriteLine("Class2");
}
}
private static void Main(string[] args)
{
IFoo test1 = new MyClass1();
IFoo test2 = new MyClass2();
test1.Method2();
test2.Method2();
Console.ReadKey();
}
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