. Net MVC 4 Web Api output JSON format

1. Add JSON output in Global

GLOBALCONFIGURATION.CONFIGURATION.FORMATTERS.JSONFORMATTER.MEDIATYPEMAPPINGS.ADD (new Querystringmapping ("json""true""application /json"));

1 protected voidApplication_Start ()2 {3 Arearegistration.registerallareas ();4     //add JSON parsing using methodshttp://xxx/api/action?json=true5GLOBALCONFIGURATION.CONFIGURATION.FORMATTERS.JSONFORMATTER.MEDIATYPEMAPPINGS.ADD (NewQuerystringmapping ("JSON","true","Application/json"));6 Webapiconfig.register (globalconfiguration.configuration);7 filterconfig.registerglobalfilters (globalfilters.filters);8 routeconfig.registerroutes (routetable.routes);9 bundleconfig.registerbundles (bundletable.bundles);Ten}

2. Delete XML parsing in Global

GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear ();

1 protected voidApplication_Start ()2 {3 Arearegistration.registerallareas ();4 Webapiconfig.register (globalconfiguration.configuration);5 filterconfig.registerglobalfilters (globalfilters.filters);6 routeconfig.registerroutes (routetable.routes);7 bundleconfig.registerbundles (bundletable.bundles);8     //remove parsing of XML when the return value is string, return string is not a JSON object directly9 GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear ();Ten}

3. Specify return format

1 New method requires assembly: System.Web.Extensions2  Public Statichttpresponsemessage ToJson (Object obj)3 {4 String str;5     if(obj isString | | Obj isChar)6     {7str =obj. ToString ();8     }9     ElseTen     { One         varSerializer =NewJavaScriptSerializer (); Astr =Serializer. Serialize (obj); -     } -     varresult =Newhttpresponsemessage {Content =NewStringcontent (str, encoding.getencoding ("UTF-8"),"Application/json") }; the     returnresult; -}

Convert user method to JSON object output

1  Public Httpresponsemessage GetString (string  name)2{3     return ToJson (name); 4 }

4. Overriding the default implementation class all output will be re-parsed into JSON

1 New Jsoncontentnegotiator class2  Public classJsoncontentnegotiator:icontentnegotiator3 {4     Private ReadOnlyJsonmediatypeformatter _jsonformatter;5      PublicJsoncontentnegotiator (Jsonmediatypeformatter formatter)6     {7_jsonformatter =formatter;8     }9 Ten      PublicContentnegotiationresult Negotiate (type type, httprequestmessage request, ienumerable<mediatypeformatter>formatters) One     { A         varresult =NewContentnegotiationresult (_jsonformatter,NewMediatypeheadervalue ("Application/json")); -         returnresult; -     } the}

1 using overrides in Webapiconfig2  Public Static voidRegister (httpconfiguration config)3 {4 CONFIG. Routes.maphttproute (5Name"Defaultapi",6Routetemplate:"Api/{controller}/{id}",7DefaultsNew{id =Routeparameter.optional}8     );9 Ten     varJsonformatter =NewJsonmediatypeformatter (); OneConfig. Services.replace (typeof(Icontentnegotiator),NewJsoncontentnegotiator (Jsonformatter)); A  -     //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.  the     //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-api - CONFIG. Enablesystemdiagnosticstracing (); +}

. Net MVC 4 Web Api output JSON format