CODEWITHSUNDEEP
c#.netreflection
stiank81
stiank81

Reputation: 25686

Using reflection to find interfaces implemented

I have the following case: 

public interface IPerson { .. }    
public class Person : IPerson { .. }    
public class User : Person { .. }

Now; if I have a "User" object - how can I check if this implements IPerson using reflection? To be more precise I have an object that might have a property SomeUser, which should be of some type implementing the interface "IPerson". In my case I actually have a User, but this is what I want to check through reflection. I can't figure out how to check the property type since it is a "User", but I want to check if it implements IPerson...:

var control = _container.Resolve(objType); // objType is User here
var prop = viewType.GetProperty("SomeUser");
if ((prop != null) && (prop.PropertyType is IPerson)) 
{ .. }

(Note that this is a simplification of my actual case, but the point should be the same...)

Upvotes: 24

Views: 22889

Answers (3)

SwDevMan81
SwDevMan81

Reputation: 49978

See Implementations of interface through Reflection.

Upvotes: 0

Stefan Steinegger
Stefan Steinegger

Reputation: 64628

var control = _container.Resolve(objType); 
var prop = viewType.GetProperty("SomeUser");
if ((prop != null) && (prop.PropertyType.GetInterfaces().Contains(typeof(IPerson))) 
{ .. }

Upvotes: 20

Konamiman
Konamiman

Reputation: 50273

Check the Type.IsAssignableFrom method.

Upvotes: 33

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