StructureMap: "There is no standard plugin instance" - although this

Question

I have been using StructureMap for about 6 months; you would think that it will start to get easier. This does not seem to be the case.

Here is the first line of my registry:

            For<IDbConnection>()
            .Singleton()
            .Use<SqlConnection>()
            .Ctor<string>(WebConfigurationManager.ConnectionStrings["UnifiedConnectionString"].ConnectionString);

It compiles and runs. But when I try to use this interface, like this:

            return MsSqlConfiguration.MsSql2008.ConnectionString(((DbConnection)ObjectFactory.GetInstance<IDbConnection>()).ConnectionString);

I get

StructureMap Exception Code:  202
No Default Instance defined for PluginFamily System.Data.IDbConnection, System.Data,
 Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

Now something may be missing for me (well, I obviously have), but I do not know how much I can explain how to determine the default instance for IDbConnection. What am I doing wrong?

Edit: At Joshua's request, I am adding the complete code for a minimal case.

, . , SM, . , , , , .

-, :

       static void Main(string[] args)
    {
        Debug.Print("Connection String: {0}", ConfigurationManager.ConnectionStrings["UnifiedConnectionString"].ConnectionString);
        (new Bootstrapper()).BootstrapStructureMap();

    }

Bootstrapper, :

    public class Bootstrapper : IBootstrapper
{
    public  void BootstrapStructureMap()
    {
        ObjectFactory.Initialize(x =>

                x.Scan(s =>
                {
                    s.WithDefaultConventions();
                    s.TheCallingAssembly();
                    s.LookForRegistries();
                }
                    )
        );
        Debug.Print(ObjectFactory.WhatDoIHave());
        try
        {
            ObjectFactory.AssertConfigurationIsValid();
        }
        catch (StructureMapConfigurationException ex)
        {
            string msg = ex.ToString();
            throw;
        }
        catch (Exception ex)
        {
            string msg = ex.ToString();
            throw;
        }
        InitAutoMapper();
    }

, , DependencyRegistry, , , , .

    public class DependencyRegistry : Registry
{
    public DependencyRegistry()
    {     
        For<IDbConnection>()
            .Singleton()
            .Use<SqlConnection>()
            .Ctor<string>(ConfigurationManager.ConnectionStrings["UnifiedConnectionString"].ConnectionString);
        //For<...
    }
}

, , "WhatDoIHave()", SM 205 AssertConfigurationIsValid(). (-) , SqlConnection, " " connectionString\ "InstanceKey".

:

StructureMap.Exceptions.StructureMapConfigurationException:

'a54d3ca1-33b5-4100-82d4-13e458f57a3f' ( System.Data.SqlClient.SqlConnection, System.Data, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089)    PluginType System.Data.IDbConnection, System.Data, Version = 2.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089

StructureMap.StructureMapException: StructureMap: 205 "connectionString" "a54d3ca1-33b5-4100-82d4-13e458f57a3f"   StructureMap.Pipeline.ConstructorInstance. <.ctor > b__0 ( String)   StructureMap.Util.Cache 2.get_Item(KEY key) at StructureMap.Pipeline.ConstructorInstance.Get(String propertyName, Type pluginType, BuildSession session) at StructureMap.Pipeline.ConstructorInstance.Get[T](String propertyName, BuildSession session) at StructureMap.Pipeline.Arguments.Get[T](String propertyName) at lambda_method(ExecutionScope , IArguments ) at StructureMap.Construction.BuilderCompiler.FuncCompiler 1. < > c__DisplayClass2.b__0 (IArguments args)

... (, )...

: 1 / 0

StructureMap.Container.AssertConfigurationIsValid()   StructureMap.ObjectFactory.AssertConfigurationIsValid()   ConsoleIoCTest.Bootstrapper.BootstrapStructureMap() U:\dave\VS2008Projects\FMSWeb\FMSWeb\ConsoleIoCTest\Bootstrapper.cs: 29

? . , "connectionString", .ctor?

, , .

Answer 1

, , " " Ctor.

For<IDbConnection>()
  .Singleton()
  .Use<SqlConnection>()
  .Ctor<string>().Is(theConnectionString);