c# - Ninject WithConstructorArgument not overriding global binding for type? -

i have general bindings, , 1 of this:

bind<ihasher>().to<sha256hasher>(); 

this works great, there few classes throughout use hasher. there 1 or 2 controllers require type of hasher using hash 3rd parties, such gravatar expect md5 hashes. below:

bind<isomecontroller>().to<somecontroller>().named("somecontroller").withconstructorargument("emailhasher", new md5hasher()); 

then controller looks like:

    public class somecontroller : controller     {         private ihasher emailhasher;          public campaigncontroller(ihasher emailhasher)         {             this.emailhasher = emailhasher;         }     } 

when debugging expect ihasher md5hasher, sha256hasher. expected behaviour , way make use overridden type?

i suppose mvc controller. mvc framework resolve somecontroller not isomecontroller. hence binding not apply ninject use implicit binding somecontroller toself instead.

create binding somecontroller toself instead.