CODEWITHSUNDEEP
c#reflection
J4N
J4N

Reputation: 20697

Check if a "Type" override a dynamic type

We are giving some repetitive jobs to a consultant company, we just have a few constraints that could not be checked by compilation, like a requirement to override a specific property in all class implementing a specific interface.

The property of the interface, which should be overrided in all classes has the following signature:

dynamic Definition{get;}

I found this stackoverflow question: How to find out if property is inherited from a base class or declared in derived?

Which is closed to my case, but in my case, the property is defined is inherited class and overrided in this one:

public class ClassA:IMyInterface
{
   public virtual dynamic Definition{get{ /*return SomethingSpecificToClassA;*/}}
}

public class ClassB:ClassA
{
   public override dynamic Definition{get{ /*return SomethingSpecificToClassB;*/}}
}

//The end goal is to know if ClassB has correctly overriden the property
bool overriden = typeof(ClassB)GetProperties(...).Any(p=>p.Name=="Definition");

Upvotes: 1

Views: 104

Answers (2)

xanatos
xanatos

Reputation: 111810

This is the solution: you ask ClassB its interface map, you look for the method you want in the interface map and then you look where the implementation method (classMethod) is declared.

var interfaceMethod = typeof(I).GetProperty("Definition").GetGetMethod();
var map = typeof(ClassB).GetInterfaceMap(typeof(I));
var ix = Array.IndexOf(map.InterfaceMethods, interfaceMethod);
var classMethod = map.TargetMethods[ix];
bool isDeclaredInClass = classMethod.DeclaringType == typeof(ClassB);

Upvotes: 1

Konrad Kokosa
Konrad Kokosa

Reputation: 16878

You can find for property declared only in your type of interests:

var prop = typeof (ClassB).GetProperty("Definition", BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);

Then you can then check if its getter is virtual:

prop.GetMethod.IsVirtual

which will be false if Definition hides (or uses new) in ClassB

Upvotes: 0

Related Questions