How to Convert JSON object to Custom C object

Question

Is there an easy way to populate my C  Object with the JSON object passed via AJAX   This is the JSON Object passed to C  WEBMETHOD from the page using JSON stringify         user              name    asdf            teamname    b            email    c            players     1    2             C  WebMetod That receives the JSON Object   WebMethod  public static void SaveTeam Object user         C  Class that represents the object structure of JSON Object passed in to the WebMethod  public class User       public string name   get  set        public string teamname   get  set        public string email   get  set        public Array players   get  set

User · Answer

The JSON C  class generator on codeplex generates classes which work well with NewtonSoftJS

User · Answer

A good way to use JSON in C  is with JSON NET  Quick Starts  amp  API Documentation from  JSON NET - Official site help you work with it   An example of how to use it   public class User       public User string json                JObject jObject   JObject Parse json           JToken jUser   jObject  user            name    string  jUser  name            teamname    string  jUser  teamname            email    string  jUser  email            players   jUser  players   ToArray               public string name   get  set        public string teamname   get  set        public string email   get  set        public Array players   get  set          Use private void Run         string json        user      name     asdf     teamname     b     email     c     players      1     2            User user   new User json        Console WriteLine  Name       user name       Console WriteLine  Teamname       user teamname       Console WriteLine  Email       user email       Console WriteLine  Players          foreach  var player in user players          Console WriteLine player

User · Answer

Rather than sending as just an object    Create a public class of properties that is accessible and send the data to the Webmethod    WebMethod  public static void SaveTeam useSomeClassHere user        use same parameters names in ajax call to send data

User · Answer

Given your code sample  you shouldn t need to do anything else     If you pass that JSON string to your web method  it will automatically parse the JSON string and create a populated User object as the parameter for your SaveTeam method   Generally though  you can use the JavascriptSerializer class as below  or for more flexibility  use any of the various Json frameworks out there  Jayrock JSON is a good one  for easy JSON manipulation    JavaScriptSerializer jss  new JavaScriptSerializer     User user   jss Deserialize lt User gt  jsonResponse

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JavaScript Serializer  requires using System Web Script Serialization   public class JavaScriptSerializerDeSerializer lt T gt        private readonly JavaScriptSerializer serializer       public JavaScriptSerializerDeSerializer                 this serializer   new JavaScriptSerializer               public string Serialize T t                return this serializer Serialize t              public T Deseralize string stringObject                return this serializer Deserialize lt T gt  stringObject             Data Contract Serializer  requires using System Runtime Serialization Json  - The generic type T should be serializable more on Data Contract  public class JsonSerializerDeserializer lt T gt  where T   class       private readonly DataContractJsonSerializer jsonSerializer       public JsonSerializerDeserializer                 this jsonSerializer   new DataContractJsonSerializer typeof T               public string Serialize T t                using  var memoryStream   new MemoryStream                          this jsonSerializer WriteObject memoryStream  t               memoryStream Position   0              using  var sr   new StreamReader memoryStream                                 return sr ReadToEnd                                       public T Deserialize string objectString                using  var ms   new MemoryStream System Text ASCIIEncoding ASCII GetBytes  objectString                           return  T this jsonSerializer ReadObject ms

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public static class Utilities       public static T Deserialize lt T gt  string jsonString                using  MemoryStream ms   new MemoryStream Encoding Unicode GetBytes jsonString                              DataContractJsonSerializer serializer   new DataContractJsonSerializer typeof T                return  T serializer ReadObject ms                       More information go to following link http   ishareidea blogspot in 2012 05 json-conversion html  About DataContractJsonSerializer Class you can read here

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Performance-wise  I found the ServiceStack s serializer a bit faster than then others  It s JsonSerializer class in ServiceStack Text namespace   https   github com ServiceStack ServiceStack Text  ServiceStack is available through NuGet package  https   www nuget org packages ServiceStack

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The following 2 examples make use of either   JavaScriptSerializer under System Web Script Serialization Or Json Decode under System Web Helpers     Example 1  using System Web Script Serialization  using Microsoft VisualStudio TestTools UnitTesting  using System Web Script Serialization   namespace Tests        TestClass      public class JsonTests                TestMethod          public void Test                         var json       user      name     asdf     teamname     b     email     c     players      1     2                    JavaScriptSerializer serializer   new JavaScriptSerializer                dynamic jsonObject   serializer Deserialize lt dynamic gt  json                dynamic x   jsonObject  user       result is Dictionary lt string object gt  user with fields name  teamname  email and players with their values             x   jsonObject  user    name       result is asdf             x   jsonObject  user    players       result is object   players with its values                     Usage  JSON object to Custom C  object  using System  using Microsoft VisualStudio TestTools UnitTesting  using System Web Script Serialization  using System Linq   namespace Tests        TestClass      public class JsonTests                TestMethod          public void TestJavaScriptSerializer                         var json       user      name     asdf     teamname     b     email     c     players      1     2                    User user   new User json               Console WriteLine  Name       user name               Console WriteLine  Teamname       user teamname               Console WriteLine  Email       user email               Console WriteLine  Players                 foreach  var player in user players                  Console WriteLine player                        public class User           public User string json                JavaScriptSerializer serializer   new JavaScriptSerializer                var jsonObject   serializer Deserialize lt dynamic gt  json               name    string jsonObject  user    name                teamname    string jsonObject  user    teamname                email    string jsonObject  user    email                players   jsonObject  user    players                       public string name   get  set            public string teamname   get  set            public string email   get  set            public Array players   get  set                Example 2  using System Web Helpers  using Microsoft VisualStudio TestTools UnitTesting  using System Web Helpers   namespace Tests        TestClass      public class JsonTests                TestMethod          public void TestJsonDecode                         var json       user      name     asdf     teamname     b     email     c     players      1     2                    dynamic jsonObject   Json Decode json                dynamic x   jsonObject user     result is dynamic json object user with fields name  teamname  email and players with their values             x   jsonObject user name     result is asdf             x   jsonObject user players     result is dynamic json array players with its values                     Usage  JSON object to Custom C  object  using System  using Microsoft VisualStudio TestTools UnitTesting  using System Web Helpers  using System Linq   namespace Tests        TestClass      public class JsonTests                TestMethod          public void TestJsonDecode                         var json       user      name     asdf     teamname     b     email     c     players      1     2                    User user   new User json               Console WriteLine  Name       user name               Console WriteLine  Teamname       user teamname               Console WriteLine  Email       user email               Console WriteLine  Players                 foreach  var player in user players                  Console WriteLine player                        public class User           public User string json                var jsonObject   Json Decode json               name    string jsonObject user name              teamname    string jsonObject user teamname              email    string jsonObject user email              players    DynamicJsonArray  jsonObject user players                     public string name   get  set            public string teamname   get  set            public string email   get  set            public Array players   get  set              This code requires adding System Web Helpers namespace found in       ProgramFiles  Microsoft ASP NET ASP NET Web   Pages VERSION  Assemblies System Web Helpers dll   Or      ProgramFiles x86   Microsoft ASP NET ASP NET Web   Pages VERSION  Assemblies System Web Helpers dll   Hope this helps

User · Answer

To keep your options open  if you re using  NET 3 5 or later  here is a wrapped up example you can use straight from the framework using Generics  As others have mentioned  if it s not just simple objects you should really use JSON net   public static string Serialize lt T gt  T obj        DataContractJsonSerializer serializer   new DataContractJsonSerializer obj GetType         MemoryStream ms   new MemoryStream        serializer WriteObject ms  obj       string retVal   Encoding UTF8 GetString ms ToArray         return retVal     public static T Deserialize lt T gt  string json        T obj   Activator CreateInstance lt T gt         MemoryStream ms   new MemoryStream Encoding Unicode GetBytes json        DataContractJsonSerializer serializer   new DataContractJsonSerializer obj GetType         obj    T serializer ReadObject ms       ms Close        return obj      You ll need   using System Runtime Serialization   using System Runtime Serialization Json

User · Answer

Since we all love one liners code  Newtonsoft is faster than java script serializer       this one depends on the Newtonsoft NuGet package  which is popular and better than the default serializer   if we have class then use below   Mycustomclassname oMycustomclassname   Newtonsoft Json JsonConvert DeserializeObject lt Mycustomclassname gt  jsonString     no class then use dynamic   var oMycustomclassname   Newtonsoft Json JsonConvert DeserializeObject lt dynamic gt  jsonString

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Using JavaScriptSerializer   is less strict than the generic solution offered   public static T Deserialize string json   That might come handy when passing json to the server that does not match exactly the Object definition you are trying to convert to

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Another Really simple Solution is using the library Newtonsoft Json   User user   JsonConvert DeserializeObject lt User gt  jsonString

User · Answer

JSON Net is your best bet but  depending on the shape of the objects and whether there are circular dependencies  you could use JavaScriptSerializer or DataContractSerializer

[c#] How to Convert JSON object to Custom C# object?

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