c# - Ninject factory create T based on enum -

i want let ninject resolve instance of t based on specific enum input value.

i have read ninject's factory extension, couldn't find example having factory resolve specific class based on enum.

each class derives base class , derived class has several, different interfaces ninject has resolve.

for example how interface should like:

public interface iprocessfactory {     t create<t>(processindex processindex) t : baseprocess; } 

how can achieved ?

this not supported out of box. can customize writing own implementation of iinstanceprovider(also see ninject wiki entry. configure specific factory:

kernel.bind<ifoofactory>()       .tofactory(() => new mycustominstanceprovider()); 

or alternatively, if want change behavior of .tofactory() bindings: rebind iinstanceprovider after loading ninject.extensions.factory:

kernel.rebind<iinstanceprovider>().to<mycustominstanceprovider>(); 

however, if it's not need consider manually writing factory implementation @ composition root.

anyway, in both cases you'll need know how create conditional binding. ninject calls contextual binding. 1 method use binding-metadata:

const string enumkey = "enumkey";  bind<ifoo>().to<afoo>()             .withmetadata(enumkey, myenum.a);  iresolutionroot.get<ifoo>(x => x.get<myenum>(enumkey) == myenum.a); 

another way create custom iparameter , use in conditional binding:

bind<ifoo>().to<afoo>()             .when(x => x.parameters.oftype<myparameter>().single().value == a);