StructureMap Exception Code: 202 No Default Instance defined for PluginFamily

I am new to StructureMap. I have downloaded and am
using version 2.6.1.0. I keep getting the below
error:

StructureMap Exception Code: 202 No
Default Instance defined for
PluginFamily
Company.ProjectCore.Core.IConfiguration,
Company.ProjectCore, Version=1.0.0.0,
Culture=neutral, PublicKeyToken=null

My Global.asax.cs looks like:

protected void Application_Start(object sender, EventArgs e)
{

    var container = new Container(x =>
                    {
                        x.For<ICache>().Use<Cache>();
                        x.For<IEmailService>().Use<EmailService>();
                        x.For<IUserSession>().Use<UserSession>();
                        x.For<IRedirector>().Use<Redirector>();
                        x.For<INavigation>().Use<Navigation>();
                    });

                container.AssertConfigurationIsValid();

}

I changed from ObjectFactory.Initialize to “new Container” to debug.
When stepping through the AssertConfigurationIsValid() method, Cache
works but EmailService fails at the GetInstance method in the
following line:

[Pluggable("Default")]
public class EmailService : IEmailService

private readonly IConfiguration _configuration;

public EmailService()
{
    _configuration = ObjectFactory.GetInstance<IConfiguration>();
}

If I remove IEmailService, the same 202 error is thrown at IUserSession.

Should I be adding something else in Application_Start or in my class files?

Thanks in advance…

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

This problem was fixed by replacing ObjectFactory.Initialize with ObjectFactory.Configure and adding the assemblies in my project:

ObjectFactory.Configure(x =>
{
    x.Scan(scan =>
    {
        scan.LookForRegistries();
        scan.Assembly("MyAssembly");
        scan.Assembly("MyAssembly");
    });
});

Method 2

I was getting the same error message, but for a different reason. I had a class Foo that defined two constructors like so:

public class Foo : IFoo
{
    private Bar _bar;

    public Foo()
    {
       _bar = new Bar();
    }

    public Foo(Bar bar)
    {
        _bar = bar;
    }
}

and my StructureMap configuration was like so:

For<IFoo>.Use<Foo>();

I kept getting an error message like

202 No Default Instance defined for Bar

The problem was that StructureMap was trying to construct a Foo using the constructor that takes a parameter, instead of using the parameterless default constructor. I solved it using the answer in How to define a default constructor by code using StructureMap? like so:

For<IFoo>.Use(() => new Foo());

Method 3

Where’s your bootstrapping for the IConfiguration concrete class?

I.e:

x.For<IConfiguration>().Use<Configuration>();

Method 4

I was seeing the same error. In my case, I had a typo in the implementation name, so the interface and implementation names did not match.

public class FooTypo : IFoo

Where I should have had:

public class Foo : IFoo

Method 5

Another thing to look for is to make sure that the dependency (class) that you are injecting is public. If the class is internal, it can cause this issue.

Method 6

Mine was because I had accidentally referenced the concrete type in the constructor of another class rather than the interface

eg in structuremap i had

x.For<IFoo>().Use<Foo>();
x.For<IBar>().Use<Bar>();

and constructor for Foo looked like this

public class Foo : IFoo {
    public Foo(Bar bar) {...}
}

when it should have looked like this as SM couldn’t just create an instance of Bar, it only knows how to make an IBar:

public class Foo : IFoo {
    public Foo(IBar bar) {...}
}

It also meant that my exception referenced the concrete type instead of the interface but I missed that initially

Method 7

When I got this error it was because I forgot to mark my class public. That simple.

Method 8

I also had this issue when I was using Visual Studio 2015 with NCrunch.
All you have to do is toggle an option to true in the configuration menu item under NCrunch. Switching initialize to configure didn’t work for me.

The option is under Build Settings, it is named ‘Copy referenced assemblies to workspace‘

Method 9

I was seeing the same error. In my case, I had a typo in the implementation with the same name of another class in another project.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0