. NET based on MVC4 WEB API Output JSON format instance _ practical Tips

This example describes the. NET based on the MVC4 WEB API output JSON format method, share for everyone to reference. The implementation methods are as follows:

1. Add JSON output in Global

Copy Code code as follows:

GLOBALCONFIGURATION.CONFIGURATION.FORMATTERS.JSONFORMATTER.MEDIATYPEMAPPINGS.ADD (New querystringmapping ("JSON"), "True", "Application/json"));

protected void Application_Start ()
{
Arearegistration.registerallareas ();
Add JSON parse using method http://xxx/api/action?json=true
GLOBALCONFIGURATION.CONFIGURATION.FORMATTERS.JSONFORMATTER.MEDIATYPEMAPPINGS.ADD (New querystringmapping ("JSON"), "True", "Application/json"));
Webapiconfig.register (globalconfiguration.configuration);
Filterconfig.registerglobalfilters (globalfilters.filters);
Routeconfig.registerroutes (routetable.routes);
Bundleconfig.registerbundles (Bundletable.bundles);
}

2. Delete XML parsing in Global

Copy Code code as follows:

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

protected void Application_Start ()
{
Arearegistration.registerallareas ();
Webapiconfig.register (globalconfiguration.configuration);
Filterconfig.registerglobalfilters (globalfilters.filters);
Routeconfig.registerroutes (routetable.routes);
Bundleconfig.registerbundles (Bundletable.bundles);
Delete parsing of XML returns string directly when the return value is string is not a JSON object
GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear ();
}

3. Specify return format

The new method requires an assembly:

Copy Code code as follows:

System.Web.Extensions
public static Httpresponsemessage Tojson (Object obj)
{
String str;
if (obj is String | | |? obj is Char)
{
str = obj. ToString ();
}
Else
{
var serializer = new JavaScriptSerializer ();
str = serializer. Serialize (obj);
}
var result = new Httpresponsemessage {Content = new stringcontent (str, encoding.getencoding ("UTF-8"), "Application/json" ) };
return result;
}

Convert user method to JSON object output

Copy Code code as follows:

Public Httpresponsemessage GetString (string name)
{
return Tojson (name);
}

4, overriding the default implementation class all output will be reparse to JSON

New Jsoncontentnegotiator Class

Copy Code code as follows:

public class Jsoncontentnegotiator:icontentnegotiator
{
Private ReadOnly Jsonmediatypeformatter _jsonformatter;
Public Jsoncontentnegotiator (Jsonmediatypeformatter formatter)
{
_jsonformatter = formatter;
}

Public Contentnegotiationresult Negotiate (type type, httprequestmessage request, Ienumerable<mediatypeformatter > formatters)
{
var result = new Contentnegotiationresult (_jsonformatter, New Mediatypeheadervalue ("Application/json"));
return result;
}
}

Using Overrides in Webapiconfig

Copy Code code as follows:

public static void Register (Httpconfiguration config)
{
Config. Routes.maphttproute (
Name: "Defaultapi",
Routetemplate: "Api/{controller}/{id}",
defaults:new {id = routeparameter.optional}
);

var jsonformatter = new Jsonmediatypeformatter ();
Config. Services.replace (typeof (Icontentnegotiator), New Jsoncontentnegotiator (Jsonformatter));

Uncomment the following line of code to enable query support for operations with IQueryable or iqueryable<t> return types.
To avoid handling unexpected queries or malicious queries, use the validation settings on Queryableattribute to validate incoming queries.
For more information, please visit http://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 ();
}

I hope this article will help you with the ASP.net program design.