c# - No action was found on controller -

i'm developing asp.net web api c# , .net framework 4.5.1.

i have strange behaviour. can access 2 following routes can't reach third , fourth. error:

no http resource found matches request uri. no action found in 'externalcodes' driver match application.

[httpput] [route("api/externalcodes/setcodesasused")] public httpresponsemessage setcodesasused(list<string> codes) {     return changecodesstatus(codes, 3); }  [httpput] [route("api/externalcodes/setcodesasunused")] public httpresponsemessage setcodesasunused(list<string> codes) {     return changecodesstatus(codes, 1); }  [httpput] [route("api/externalcodes/setbatchcodesasused")] public httpresponsemessage setbatchcodesasused(int batchid) {     return changebatchcodesstatus(batchid, 3); }  [httpput] [route("api/externalcodes/setbatchcodesasunused")] public httpresponsemessage setbatchcodesasunused(int batchid) {     return changebatchcodesstatus(batchid, 1); } 

all in same class.

this webapiconfig class:

public static class webapiconfig {     public static void register(httpconfiguration config)     {         // web api configuration , services          // web api routes         config.maphttpattributeroutes();          config.routes.maphttproute(             name: "defaultapi",             routetemplate: "api/{controller}/{id}",             defaults: new { id = routeparameter.optional }         );          config.routes.maphttproute(             name: "productionorderactionapi",             routetemplate: "api/productionorders/{action}/{ordernumber}",             defaults: new { controller = "productionorders", ordernumber = routeparameter.optional });          config.routes.maphttproute(             name: "batchesactionapi",             routetemplate: "api/batches/{action}",             defaults: new { controller = "batches" });          config.routes.maphttproute(             name: "linesactionapi",             routetemplate: "api/lines/{action}",             defaults: new { controller = "lines" });          config.routes.maphttproute(             name: "externalcodesactionapi",             routetemplate: "api/externalcodes",             defaults: new { controller = "externalcodes" });          config.routes.maphttproute(             name: "codesactionapi",             routetemplate: "api/codes",             defaults: new { controller = "codes" });          config.routes.maphttproute(             name: "aggregationsactionapi",             routetemplate: "api/aggregations",             defaults: new { controller = "aggregations" });     } } 

these nuget packages:

<?xml version="1.0" encoding="utf-8"?> <packages>   <package id="antlr" version="3.5.0.2" targetframework="net451" />   <package id="bootstrap" version="3.3.2" targetframework="net451" />   <package id="dotnetzip" version="1.9.3" targetframework="net451" />   <package id="entityframework" version="6.1.3" targetframework="net451" />   <package id="jquery" version="2.1.3" targetframework="net451" />   <package id="jquery.validation" version="1.13.1" targetframework="net451" />   <package id="log4net" version="2.0.3" targetframework="net451" />   <package id="microsoft.aspnet.mvc" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.razor" version="3.2.3" targetframework="net451" />   <package id="microsoft.aspnet.web.optimization" version="1.1.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.client" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.client.es" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.core" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.core.es" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.webhost" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webapi.webhost.es" version="5.2.3" targetframework="net451" />   <package id="microsoft.aspnet.webpages" version="3.2.3" targetframework="net451" />   <package id="microsoft.jquery.unobtrusive.ajax" version="3.2.3" targetframework="net451" />   <package id="microsoft.jquery.unobtrusive.validation" version="3.2.3" targetframework="net451" />   <package id="microsoft.web.infrastructure" version="1.0.0.0" targetframework="net451" />   <package id="modernizr" version="2.8.3" targetframework="net451" />   <package id="newtonsoft.json" version="6.0.8" targetframework="net451" />   <package id="ninject" version="3.2.2.0" targetframework="net451" />   <package id="ninject.mvc5" version="3.2.1.0" targetframework="net451" />   <package id="ninject.web.common" version="3.2.3.0" targetframework="net451" />   <package id="ninject.web.common.webhost" version="3.2.3.0" targetframework="net451" />   <package id="webactivatorex" version="2.0.6" targetframework="net451" />   <package id="webgrease" version="1.6.0" targetframework="net451" /> </packages> 

this strange, because routes in same controller.

any idea happening?

the links access actions are:

http://myspecialserver:53827/api/externalcodes/setbatchcodesasused http://myspecialserver:53827/api/externalcodes/setcodesasused 

you accessing action on controller without parameter.

in call parameter codes null. working because list<string>-datatype nullable.

[httpput] [route("api/externalcodes/setcodesasused")] public httpresponsemessage setcodesasused(list<string> codes) {     return changecodesstatus(codes, 3); } 

the second link same -> batchid null. int non-nullable type error.

anyway should change route if have parameters (especially if non-nullable).

[route("api/externalcodes/setbatchcodesasunused/{batchid}")]

this route expects id part of call. has advantage, know, resource changing.

the call this:

http://myspecialserver:53827/api/externalcodes/setbatchcodesasused/1