Using WebApi and structure map dependency injection

Question

Although there are so many question on stack overflow which tends similar to my this question but no one is resolving my problem

I was using an MVC4 internet application wherein i had few MVC controller and for dependency injection i was using Structure map. Although dependency injection works fine with MVC controller but when i added an WebApi controller in the same MVC internet application and using the same parameter in constructor of WebApi controller as what i am using in MVC controller but dependency injection is not working with WebApi controller, although if i don't use dependency injection for WebApi controller(parameterless constructor), then it works fine, but for WebApi dependency injection(parameterized constructor) it is throwing an error No parameter less constructor is found.

Conclusion depedencies are not being injected for WebApi Controller in Internet(MVC application).

Few articles suggested to use DependencyResolver.SetResolver(). i used but did not resolve the issue.

Yogesh · Accepted Answer · 2013-03-25 09:10:05Z

2

The reason why WebApi controller were not working is as following:

Since MVC Controller uses different DependenyResolver instance that is the part of System.Web.MVC .dll and within the System.Web.MVC namespace

http://msdn.microsoft.com/en-us/library/system.web.mvc.idependencyresolver(v=vs.98).aspx

Where as Api Controllers uses DependencyResolver instance that is part of System.Web.Http.

http://msdn.microsoft.com/en-us/library/system.web.http.dependencies.idependencyresolver(v=vs.108).aspx

answered Mar 25, 2013 at 9:10

Yogesh

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CodeCaster · Accepted Answer · 2013-03-19 10:55:48Z

1

MVC and WebAPI controllers have a different way of setting their dependency resolver. This is how I set my dependency resolver for Unity:

public void ConfigureForMvc4()
{
    DependencyResolver.SetResolver(
        new UnityMvc4.UnityDependencyResolver(Container));
}

public void ConfigureForWebApi()
{
    GlobalConfiguration.Configuration.DependencyResolver =
        new UnityWebApi.UnityDependencyResolver(Container);
}

answered Mar 19, 2013 at 10:55

CodeCaster

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4 Comments

CodeCaster Over a year ago

Nou you haven't. You're talking about DependencyResolver.SetResolver, which is used for MVC controllers. Web API controllers use GlobalConfiguration.Configuration.DependencyResolver.

Yogesh Over a year ago

Oh I tried to use this GlobalConfiguration.Configuration.DependencyResolver = new UnityWebApi.UnityDependencyResolver(Container); but in my case what i would write my SmDependencyResolve deriver form IDependcencyResolver of system.web.mvc where Global configuration dependency resolver is form system.web.http IDependency resolver

Yogesh Over a year ago

Is there any seperate nuget for Structure map for MVC and structure map for WebApi controller

Peter Over a year ago

I know the question is old but, in the spirit of currency, I came across this one for WebApi nuget.org/packages/StructureMap.WebApi2

Umair Akbar · Accepted Answer · 2017-12-11 04:08:07Z

0

You need to add Dependency Injection files for WebApi

Install NuGet StructureMap.WebApi2 and in the App_Start/WebApiConfig.cs file, call StructuremapWebApi.Start();

Refer: https://www.exceptionnotfound.net/setting-up-dependency-injection-in-web-api-with-structuremap/

answered Dec 11, 2017 at 4:08

Umair Akbar

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