WCF: Returning objects in JSON format

1. Build a WCF Service first

Build a ServiceContract interface 1 [ServiceContract]

Public interface Ijsonwcfservice {//<summary>//Getjsonresult//     </summary>     // <param name= "name" ></param>//     <param name= "Address" ></param>//     <param name= " Phone "></param>     ///<remarks>//For JSON serialization, add attributes     ///[WebInvoke (Responseformat = Webmessageformat.json, bodystyle = webmessagebodystyle.wrapped)]//</remarks>//     <returns> </returns>     [OperationContract]     [WebInvoke (Responseformat = Webmessageformat.json, bodystyle = webmessagebodystyle.wrapped)]     jsonresult getjsonresult (string name, string address, String phone);}

Implement this interface

public class Jsonwcfservice:ijsonwcfservice {#region Ijsonwcfservice members///<summary>//     Implement the interface//</summary>//     <param name= "name" >Name</param>//     < param name= "Address" >Address</param>//     <param name= "Phone" >PhoneNumber</param>//     <returns>JsonResult</returns> public     Jsonresult getjsonresult (string name, string address, string Phone)     {         Jsonresult result = new Jsonresult (name, address, phone);         return result;     }     #endregion}

A return class of DataContract

[DataContract] public class Jsonresult {//<summary>//Construct//</summary> public Jso Nresult (string name, string address, String phone) {_name = string.         Format ("name:{0}", Name); _address = string.         Format ("address:{0}", Address); _PhoneNumber = string.     Format ("phonenubmer:{0}", phone);     } private string _name; <summary>///name//</summary> [DataMember] public string Name {get {Retu RN _name;     } set {_name = value;}     } private string _address; <summary>//address//</summary> [DataMember] public string Address {get         {return _address;}     set {_address = value;}     } private string _PhoneNumber;         <summary>//PhoneNumber//</summary> [DataMember] public string PhoneNumber {         get {return _phonenumber;} set {_PhoneNumber = value; }     }

2, in order to implement JSON serialization settings, we also have to add a webcontenttypemapper

(This class will eventually be used in the service's configuration file)

Using System.ServiceModel.Channels;  namespace Microsoft.Ajax.Samples {//<summary>//Jsoncontenttypemapper//     for use in configuration < Webmessageencoding webcontenttypemappertype= "Microsoft.Ajax.Samples.JsonContentTypeMapper, Jsoncontenttypemapper , version=1.0.0.0, Culture=neutral, publickeytoken=null ">///     </summary> public     class Jsoncontenttypemapper:webcontenttypemapper     {public         override Webcontentformat Getmessageformatforcontenttype (String contentType)         {             if (ContentType = = "Text/javascript")             {                 return webcontentformat.json;             }             else             {                 return webcontentformat.default;             }         }}}     

3, Add Svc file, easy to publish service

The Svc file is actually a very simple file, the following is the contents of the Svc file, you can add this file to the root of the Web site project, or it can be a subdirectory. There is not much demand for this.

<%@ ServiceHost language= "C #" debug= "true" service= "Jsonwcfservice"%>

4. Add the Web. config file

A considerable part of the knowledge in Wcfservice is about configuration

<?xml version= "1.0"?> <configuration> <appSettings/> <connectionStrings/> <system.web&gt    ; </system.web> <system.serviceModel> <behaviors> <endpointbehaviors > <behav IOR name= "Jsonwcfbehavior" > <webHttp/> </behavior> </endpointBehaviors> &            lt;/behaviors> <bindings> <customBinding> <binding name= "Jsonmapper" > <!--Here the configuration is quite important, using the Jsoncontenttypemapper class we wrote, the contract return value type is json--> <webmessageencoding webcontentty Pemappertype= "Microsoft.Ajax.Samples.JsonContentTypeMapper, Jsoncontenttypemapper, version=1.0.0.0, culture= Neutral, publickeytoken=null "> </webMessageEncoding> 
 WCF: Returning objects in JSON format