Creating JSON on the fly with JObject

Question

For some of my unit tests I want the ability to build up particular JSON values  record albums in this case  that can be used as input for the system under test   I have the following code   var jsonObject   new JObject    jsonObject Add  Date   DateTime Now   jsonObject Add  Album    Me Against The World    jsonObject Add  Year   1995   jsonObject Add  Artist    2Pac      This works fine  but I have never really like the  magic string  syntax and would prefer something closer to the expando-property syntax in JavaScript like this   jsonObject Date   DateTime Now  jsonObject Album    Me Against The World   jsonObject Year   1995  jsonObject Artist    2Pac

User · Answer

There are some environment where you cannot use dynamic (e.g. Xamarin.iOS) or cases in where you just look for an alternative to the previous valid answers.

In these cases you can do:

using Newtonsoft.Json.Linq;

JObject jsonObject =
     new JObject(
             new JProperty("Date", DateTime.Now),
             new JProperty("Album", "Me Against The World"),
             new JProperty("Year", "James 2Pac-King's blog."),
             new JProperty("Artist", "2Pac")
         )

More documentation here: http://www.newtonsoft.com/json/help/html/CreatingLINQtoJSON.htm

User · Answer

Simple way of creating newtonsoft JObject from Properties   This is a Sample User Properties  public class User       public string Name      public string MobileNo      public string Address      and i want this property in newtonsoft JObject is    JObject obj   JObject FromObject new User         Name    Manjunath       MobileNo    9876543210       Address    Mumbai  Maharashtra  India         Output will be like this     Name   Manjunath   MobileNo   9876543210   Address   Mumbai  Maharashtra  India

User · Answer

Well  how about   dynamic jsonObject   new JObject    jsonObject Date   DateTime Now  jsonObject Album    Me Against the world   jsonObject Year   1995  jsonObject Artist    2Pac

User · Answer

Sooner or later you will have property with special character  You can either use index or combination of index and property   dynamic jsonObject   new JObject    jsonObject  Create-Date     DateTime Now     lt -Index use jsonObject Album    Me Against the world      lt - Property use jsonObject  Create-Year     1995     lt -Index use jsonObject Artist    2Pac      lt -Property use

User · Answer

Neither dynamic  nor JObject FromObject solution works when you have JSON properties that are not valid C  variable names e g    odata etag   I prefer the indexer initializer syntax in my test cases   JObject jsonObject   new JObject         Date     DateTime Now        Album      Me Against The World         Year     1995        Artist      2Pac       Having separate set of enclosing symbols for initializing JObject and for adding properties to it makes the index initializers more readable than classic object initializers  especially in case of compound JSON objects as below   JObject jsonObject   new JObject         Date     DateTime Now        Album      Me Against The World         Year     1995        Artist     new JObject                 Name      2Pac             Age     28            With object initializer syntax  the above initialization would be   JObject jsonObject   new JObject          Date   DateTime Now           Album    Me Against The World            Year   1995            Artist   new JObject                          Name    2Pac                    Age   28

User · Answer

You can use the JObject Parse operation and simply supply single quote delimited JSON text   JObject  o   JObject Parse        CPU    Intel      Drives          DVD read writer        500 gigabyte hard drive             This has the nice benefit of actually being JSON and so it reads as JSON   Or you have test data that is dynamic you can use JObject FromObject operation and supply a inline object   JObject o   JObject FromObject new       channel   new               title    James Newton-King           link    http   james newtonking com           description    James Newton-King s blog            item               from p in posts             orderby p Title             select new                               title   p Title                  description   p Description                  link   p Link                  category   p Categories                           Json net documentation for serialization

User · Answer

You can use Newtonsoft library and use it as follows  using Newtonsoft Json     public class jb        public DateTime Date   set  get         public string Artist   set  get         public int Year   set  get         public string album   set  get       var jsonObject   new jb     jsonObject Date   DateTime Now  jsonObject Album    Me Against The World   jsonObject Year   1995  jsonObject Artist    2Pac     System Web Script Serialization JavaScriptSerializer oSerializer            new System Web Script Serialization JavaScriptSerializer     string sJSON   oSerializer Serialize jsonObject

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