ASP. NET API Count

1. Control returns only JSON one data

         Public classJsoncontentnegotiator:icontentnegotiator {Private ReadOnlyJsonmediatypeformatter _jsonformatter;  PublicJsoncontentnegotiator (Jsonmediatypeformatter formatter) {_jsonformatter=formatter; }             PublicContentnegotiationresult Negotiate (type type, httprequestmessage request, ienumerable<mediatypeformatter>formatters) {                varresult =NewContentnegotiationresult (_jsonformatter,NewMediatypeheadervalue ("Application/json")); returnresult; }        }

Use: In WebApiConfig.cs

  Public Static voidRegister (httpconfiguration config) {config. Routes.maphttproute (Name:"Defaultapi", Routetemplate:"Api/{controller}/{action}", defaults:New{id =routeparameter.optional}); //uncomment the following line of code to enable query support for operations that have a IQueryable or iqueryable<t> return type. //to avoid handling unexpected queries or malicious queries, use the validation settings on Queryableattribute to validate incoming queries. //For more information, please visithttp://go.microsoft.com/fwlink/?LinkId=279712. //CONFIG.            Enablequerysupport (); //to disable tracing in your application, comment out or delete the following line of code//For more information, see:Http://www.asp.net/web-apiCONFIG.            Enablesystemdiagnosticstracing (); var jsonformatter = new Jsonmediatypeformatter (); Optional:set serializer settings here config. Services.replace (typeof (Icontentnegotiator), new Jsoncontentnegotiator (jsonformatter)); }

2. Support cross-domain post, many online are. NET 4.5, find a way to find. NET 4.0 for a long time

 Public classCorshandler:delegatinghandler {Const stringOrigin ="Origin"; Const stringAccesscontrolrequestmethod ="Access-control-request-method"; Const stringAccesscontrolrequestheaders ="access-control-request-headers"; Const stringAccesscontrolalloworigin ="Access-control-allow-origin"; Const stringAccesscontrolallowmethods ="Access-control-allow-methods"; Const stringAccesscontrolallowheaders ="access-control-allow-headers"; protected OverrideTaskSendAsync (httprequestmessage request, CancellationToken CancellationToken) {BOOLIscorsrequest =request.                Headers.contains (Origin); BOOLIspreflightrequest = Request. Method = =httpmethod.options; if(iscorsrequest) {if(ispreflightrequest) {returnTask.factory.startnew{httpresponsemessage response=Newhttpresponsemessage (Httpstatuscode.ok); Response. Headers.add (Accesscontrolalloworigin, request.) Headers.getvalues (Origin).                            First ()); stringAccesscontrolrequestmethod =request. Headers.getvalues (Accesscontrolrequestmethod).                            FirstOrDefault (); if(Accesscontrolrequestmethod! =NULL) {Response.                            Headers.add (Accesscontrolallowmethods, Accesscontrolrequestmethod); }                            stringRequestedheaders =string. Join (", ", request.                            Headers.getvalues (accesscontrolrequestheaders)); if(!string. IsNullOrEmpty (requestedheaders)) {response.                            Headers.add (Accesscontrolallowheaders, requestedheaders); }                            returnresponse;                    }, CancellationToken); }                    Else                    {                        return Base. SendAsync (Request, CancellationToken). Continuewith{Httpresponsemessage resp=T.result; Resp. Headers.add (Accesscontrolalloworigin, request.) Headers.getvalues (Origin).                            First ()); returnresp;                    }); }                }                Else                {                    return Base.                SendAsync (Request, CancellationToken); }            }        }

Use: In Global.asax

        protected void Application_Start ()        {            arearegistration.registerallareas ();            Webapiconfig.register (globalconfiguration.configuration);            Filterconfig.registerglobalfilters (globalfilters.filters);            Routeconfig.registerroutes (routetable.routes);            Bundleconfig.registerbundles (bundletable.bundles);            GlobalConfiguration.Configuration.MessageHandlers.Add (   New Corshandler ());             New gzframeworkdbconfig ();        }

ASP. NET API Count