WEBAPI Return JSON format optimization

First, set WEBAPI return JSON format

Under App_start, add the following code to the register of the Webapiconfig registration function register

Config. Formatters.remove (config. Formatters.xmlformatter);

Second, set the return JSON key value uniform to lowercase

Create a new class and inherit from Defaultcontractresolver, overriding the Resolvepropertyname method,

 Public class underlinesplitcontractresolver:defaultcontractresolver {     protectedoverride  String resolvepropertyname (string  PropertyName)     {         //return Camelcasetounderlinesplit (PropertyName);         return propertyname.tolower ();     } }

Adding configuration code in the Webapiconfig.register method

// use mixed case for JSON data. The same size as the property name. Output new underlinesplitcontractresolver ();

Three, there are two very unhappy problems in the returned JSON format.

Look at the picture:

The first question is a null string, and here also returns NULL, feeling Back "" feel a little better

The second problem, Lastupdate is the time format, this kind of formatting looks a bit uncomfortable, if it is "2016-03-25 17:19:17" feel better.

Resolved as follows:

In solving the second problem, our new class Underlinesplitcontractresolver overrides the Createproperties method:

 //Resolving API NULL and time format issues protected OverrideIlist<jsonproperty>createproperties (Type type, Memberserialization memberserialization) {returntype. GetProperties
. Select (P=           {               varJP =Base.               CreateProperty (P, memberserialization); if(JP. PropertyType = =typeof(System.String)) JP. Valueprovider=NewNulltoemptystringvalueprovider (P); if(JP. Propertytype.tostring (). Contains ("System.DateTime") ) JP. Converter=NewIsodatetimeconverter () {DateTimeFormat ="YYYY-MM-DD HH:mm:ss" }; returnJP; }). ToList ();}

The Nulltoemptystringvalueprovider class inherits the Ivalueprovider code as follows:

    /// <summary>    ///resolving NULL problems returning JSON data/// </summary>     Public classNulltoemptystringvalueprovider:ivalueprovider {PropertyInfo _memberinfo;  PublicNulltoemptystringvalueprovider (PropertyInfo memberInfo) {_memberinfo=MemberInfo; }         Public ObjectGetValue (Objecttarget) {            Objectresult =_memberinfo.getvalue (target); //if (result = = null)//result = "";            if(_memberinfo.propertytype = =typeof(string) && result = =NULL) Result=""; returnresult; }         Public voidSetValue (ObjectTargetObjectvalue)        {_memberinfo.setvalue (target, value); }    }

The problem is resolved and the JSON returned is as follows:

Does it look more comfortable?

Four, tidy up the code

Create a new file InitAPI.cs with the following code:

   Public classInitapi { Public Static voidInit (httpconfiguration config) {//httpconfiguration config = globalconfiguration.configuration;CONFIG. Formatters.remove (config.            Formatters.xmlformatter); //Resolving circular reference problems with JSON serializationConfig. Formatters.JsonFormatter.SerializerSettings.ReferenceLoopHandling =Newtonsoft.Json.ReferenceLoopHandling.Ignore; //use mixed case for JSON data.            Camel, but it is the lowercase form of the JavaScript first letter. //CONFIG.            Formatters.JsonFormatter.SerializerSettings.ContractResolver = new Camelcasepropertynamescontractresolver (); //use mixed case for JSON data. The same size as the property name. OutputConfig. Formatters.JsonFormatter.SerializerSettings.ContractResolver =NewUnderlinesplitcontractresolver (); }    }     Public classUnderlinesplitcontractresolver:defaultcontractresolver {protected Override stringResolvepropertyname (stringPropertyName) {            //return Camelcasetounderlinesplit (PropertyName);            returnPropertyname.tolower (); }        Private stringCamelcasetounderlinesplit (stringname) {            returnname.        ToLower (); }        //Resolving API NULL and time format issues        protected OverrideIlist<jsonproperty>createproperties (Type type, Memberserialization memberserialization) {returntype. GetProperties (). Select (P=                   {                       varJP =Base.                       CreateProperty (P, memberserialization); if(JP. PropertyType = =typeof(System.String)) JP. Valueprovider=NewNulltoemptystringvalueprovider (P); if(JP. Propertytype.tostring (). Contains ("System.DateTime") ) JP. Converter=NewIsodatetimeconverter () {DateTimeFormat ="YYYY-MM-DD HH:mm:ss" }; returnJP; }).        ToList (); }    }    /// <summary>    ///resolving NULL problems returning JSON data/// </summary>     Public classNulltoemptystringvalueprovider:ivalueprovider {PropertyInfo _memberinfo;  PublicNulltoemptystringvalueprovider (PropertyInfo memberInfo) {_memberinfo=MemberInfo; }         Public ObjectGetValue (Objecttarget) {            Objectresult =_memberinfo.getvalue (target); //if (result = = null)//result = "";            if(_memberinfo.propertytype = =typeof(string) && result = =NULL) Result=""; returnresult; }         Public voidSetValue (ObjectTargetObjectvalue)        {_memberinfo.setvalue (target, value); }    }

To call Initapi.init (config) directly in Webapiconfig, the code is as follows:

  Public Static classWebapiconfig { Public Static voidRegister (httpconfiguration config) {//Web API Configuration and Services//Web API RoutingCONFIG.            Maphttpattributeroutes (); Config. Routes.maphttproute (Name:"Defaultapi", Routetemplate:"Api/{controller}/{id}", defaults:New{id =routeparameter.optional});        initapi.init (config); }    }

End

WEBAPI Return JSON format optimization