asp.net mvc - No default Instance is registered and cannot be automatically determined for type -

the definition of interface follows:

public interface iapplicationsettings {    string loggername { get; }    string numberofresultsperpage { get; }    string emailaddress { get; }    string credential { get; } } 

the implementation of interface given below:

public class webconfigapplicationsettings : iapplicationsettings     {         public string loggername         {             { return configurationmanager.appsettings["loggername"]; }         }          public string numberofresultsperpage         {             { return configurationmanager.appsettings["numberofresultsperpage"]; }         }          public string emailaddress         {             { return configurationmanager.appsettings["emailaddress"]; }         }          public string credential         {             { return configurationmanager.appsettings["credential"]; }         }     } 

i created factory class obtain instance of concrete implementation of webconfigsettings follows:

public class applicationsettingsfactory     {         private static iapplicationsettings _applicationsettings;          public static void initializeapplicationsettingsfactory(                                       iapplicationsettings applicationsettings)         {             _applicationsettings = applicationsettings;         }          public static iapplicationsettings getapplicationsettings()         {             return _applicationsettings;         }     } 

then resolved dependency follows:

public class defaultregistry : registry {          public defaultregistry() {             scan(                 scan => {                     scan.thecallingassembly();                     scan.withdefaultconventions();                     scan.with(new controllerconvention());                 });                for<iapplicationsettings>().use<webconfigapplicationsettings>();               applicationsettingsfactory.initializeapplicationsettingsfactory                                    (objectfactory.getinstance<iapplicationsettings>());          }     } 

now when running application throw me following exception:

exception has been thrown target of invocation. 

and inner exception

no default instance registered , cannot automatically determined type 'shoppingcart.infrastructure.configuration.iapplicationsettings'\r\n\r\nthere no configuration specified shoppingcart.infrastructure.configuration.iapplicationsettings\r\n\r\n1.) container.getinstance(shoppingcart.infrastructure.configuration.iapplicationsettings)\r\n 

i using structuremap mvc5

the reason code isn't working because when call objectfactory.getinstance<iapplicationsettings>(), registry hasn't been registered , thus, structuremap's configuration incomplete.

i believe you're trying following (tested , works):

public class applicationsettingsfactory {     public applicationsettingsfactory(webconfigapplicationsettings applicationsettings)     {         _applicationsettings = applicationsettings;     }      private static iapplicationsettings _applicationsettings;      public iapplicationsettings getapplicationsettings()     {         return _applicationsettings;     } } 

with registry configured this:

public defaultregistry() {      scan(scan => {          scan.thecallingassembly();          scan.withdefaultconventions();          scan.with(new controllerconvention());     });      this.for<iapplicationsettings>().use(ctx => ctx.getinstance<applicationsettingsfactory>().getapplicationsettings());  }