Deserialize JSON into C dynamic object

Question

Is there a way to deserialize JSON content into a C  4 dynamic type  It would be nice to skip creating a bunch of classes in order to use the DataContractJsonSerializer

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I want to do this programmatically in unit tests, I do have the luxury of typing it out.

My solution is:

var dict = JsonConvert.DeserializeObject<ExpandoObject>(json) as IDictionary<string, object>;

Now I can assert that

dict.ContainsKey("ExpectedProperty");

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I use http   json2csharp com  to get a class representing the JSON object   Input         name   John       age  31      city   New York       Childs                      name   Jim             age  11                            name   Tim             age  9                  Output   public class Child       public string name   get  set        public int age   get  set       public class Person       public string name   get  set        public int age   get  set        public string city   get  set        public List lt Child gt  Childs   get  set        After that I use Newtonsoft Json to fill the class   using Newtonsoft Json   namespace GitRepositoryCreator Common       class JObjects               public static string Get object p object                        return JsonConvert SerializeObject p object                     internal static T Get lt T gt  string p object                        return JsonConvert DeserializeObject lt T gt  p object                       You can call it like this   Person jsonClass   JObjects Get lt Person gt  stringJson    string stringJson   JObjects Get jsonClass     PS   If your JSON variable name is not a valid C  name  name starts with    you can fix that like this   public class Exception       JsonProperty PropertyName     id       public string id   get  set       public object innerException   get  set       public string message   get  set       public string typeName   get  set       public string typeKey   get  set       public int errorCode   get  set       public int eventId   get  set

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try this way   JSON example                     id   140               group   1               text    xxx                creation date   123456               created by    xxx gmail co                tags     xxxxx                             id   141               group   1               text    xxxx                creation date   123456               created by    xxx gmail com                tags     xxxxx                C  code           var jsonString    File ReadAllText Path Combine Directory GetCurrentDirectory    delete result json              var objects   JsonConvert DeserializeObject lt dynamic gt  jsonString           foreach var o in objects                        Console WriteLine    o id ToString

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Simple  string JSON data  to object without any third-party DLL file   WebClient client   new WebClient    string getString   client DownloadString  https   graph facebook com zuck     JavaScriptSerializer serializer   new JavaScriptSerializer    dynamic item   serializer Deserialize lt object gt  getString   string name   item  name       note  JavaScriptSerializer in this namespaces   System Web Script Serialization JavaScriptSerializer   Note  You can also using your custom object   Personel item   serializer Deserialize lt Personel gt  getString

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If you are happy to have a dependency upon the System Web Helpers assembly  then you can use the Json class   dynamic data   Json Decode json     It is included with the MVC framework as an additional download to the  NET 4 framework  Be sure to give Vlad an upvote if that s helpful  However if you cannot assume the client environment includes this DLL  then read on     An alternative deserialisation approach is suggested here   I modified the code slightly to fix a bug and suit my coding style   All you need is this code and a reference to System Web Extensions from your project   using System  using System Collections  using System Collections Generic  using System Collections ObjectModel  using System Dynamic  using System Linq  using System Text  using System Web Script Serialization   public sealed class DynamicJsonConverter   JavaScriptConverter       public override object Deserialize IDictionary lt string  object gt  dictionary  Type type  JavaScriptSerializer serializer                if  dictionary    null              throw new ArgumentNullException  dictionary             return type    typeof object    new DynamicJsonObject dictionary    null             public override IDictionary lt string  object gt  Serialize object obj  JavaScriptSerializer serializer                throw new NotImplementedException               public override IEnumerable lt Type gt  SupportedTypes               get   return new ReadOnlyCollection lt Type gt  new List lt Type gt  new     typeof object                     region Nested type  DynamicJsonObject      private sealed class DynamicJsonObject   DynamicObject               private readonly IDictionary lt string  object gt   dictionary           public DynamicJsonObject IDictionary lt string  object gt  dictionary                        if  dictionary    null                  throw new ArgumentNullException  dictionary                 dictionary   dictionary                     public override string ToString                         var sb   new StringBuilder                   ToString sb               return sb ToString                       private void ToString StringBuilder sb                        var firstInDictionary   true              foreach  var pair in  dictionary                                if   firstInDictionary                      sb Append                       firstInDictionary   false                  var value   pair Value                  var name   pair Key                  if  value is string                                        sb AppendFormat   0     1      name  value                                     else if  value is IDictionary lt string  object gt                                         new DynamicJsonObject  IDictionary lt string  object gt  value  ToString sb                                     else if  value is ArrayList                                        sb Append name                              var firstInArray   true                      foreach  var arrayValue in  ArrayList value                                                if   firstInArray                              sb Append                               firstInArray   false                          if  arrayValue is IDictionary lt string  object gt                               new DynamicJsonObject  IDictionary lt string  object gt  arrayValue  ToString sb                           else if  arrayValue is string                              sb AppendFormat     0      arrayValue                           else                             sb AppendFormat   0    arrayValue                                              sb Append                                         else                                       sb AppendFormat   0   1    name  value                                               sb Append                          public override bool TryGetMember GetMemberBinder binder  out object result                        if    dictionary TryGetValue binder Name  out result                                    return null to avoid exception   caller can check for null this way                    result   null                  return true                             result   WrapResultObject result               return true                     public override bool TryGetIndex GetIndexBinder binder  object   indexes  out object result                        if  indexes Length    1  amp  amp  indexes 0     null                                if    dictionary TryGetValue indexes 0  ToString    out result                                            return null to avoid exception   caller can check for null this way                        result   null                      return true                                     result   WrapResultObject result                   return true                             return base TryGetIndex binder  indexes  out result                      private static object WrapResultObject object result                        var dictionary   result as IDictionary lt string  object gt               if  dictionary    null                  return new DynamicJsonObject dictionary                var arrayList   result as ArrayList              if  arrayList    null  amp  amp  arrayList Count  gt  0                                return arrayList 0  is IDictionary lt string  object gt                         new List lt object gt  arrayList Cast lt IDictionary lt string  object gt  gt    Select x   gt  new DynamicJsonObject x                           new List lt object gt  arrayList Cast lt object gt                                 return result                        endregion     You can use it like this   string json         var serializer   new JavaScriptSerializer    serializer RegisterConverters new     new DynamicJsonConverter        dynamic obj   serializer Deserialize json  typeof object      So  given a JSON string        Items           Name   Apple    Price  12 3           Name   Grape    Price  3 21           Date   21 11 2010      The following code will work at runtime   dynamic data   serializer Deserialize json  typeof object     data Date      21 11 2010  data Items Count     2 data Items 0  Name      Apple  data Items 0  Price     12 3  as a decimal  data Items 1  Name      Grape  data Items 1  Price     3 21  as a decimal

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Another option is to  Paste JSON as classes  so it can be deserialised quick and easy    Simply copy your entire JSON In Visual Studio  Click Edit  rarr  Paste Special  rarr  Paste JSON as classes   Here is a better explanation n piccas       Paste JSON As Classes    in ASP NET and Web Tools 2012 2 RC

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You can achieve that with the help of Newtonsoft Json  Install Newtonsoft Json from Nuget and the    using Newtonsoft Json   dynamic results   JsonConvert DeserializeObject lt dynamic gt  YOUR JSON

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To get an ExpandoObject   using Newtonsoft Json  using Newtonsoft Json Converters   Container container   JsonConvert Deserialize lt Container gt  jsonAsString  new ExpandoObjectConverter

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The simplest way is   Just include this DLL file   Use the code like this   dynamic json   new JDynamic   a  abc         json a is a string  abc   dynamic json   new JDynamic   a 3 1416        json a is 3 1416m  dynamic json   new JDynamic   a 1        json a is  dynamic json   new JDynamic   1 2 3      json Length json Count is 3    And you can use json 0   json 2  to get the elements  dynamic json   new JDynamic   a  1 2 3        json a Length  json a Count is 3     And you can use  json a 0   json a 2  to get the elements  dynamic json   new JDynamic    b 1   c 1         json Length json Count is 2     And you can use the  json 0  b json 1  c to get the num

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Try this     var units   new   Name    Phone   Color   White         var jsonResponse   JsonConvert DeserializeAnonymousType json  units

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How to parse easy JSON content with dynamic  amp  JavaScriptSerializer  Please add reference of System Web Extensions and add this namespace using System Web Script Serialization  at top   public static void EasyJson         var jsonText                 some number    108 541            date time      2011-04-13T15 34 09Z              serial number      SN1234                var jss   new JavaScriptSerializer        var dict   jss Deserialize lt dynamic gt  jsonText        Console WriteLine dict  some number         Console ReadLine        How to parse nested  amp  complex json with dynamic  amp  JavaScriptSerializer  Please add reference of System Web Extensions and add this namespace using System Web Script Serialization  at top   public static void ComplexJson         var jsonText                 some number    108 541            date time      2011-04-13T15 34 09Z              serial number      SN1234              more data                    field1    1 0                field2      hello                          var jss   new JavaScriptSerializer        var dict   jss Deserialize lt dynamic gt  jsonText        Console WriteLine dict  some number         Console WriteLine dict  more data    field2         Console ReadLine

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Look at the article I wrote on CodeProject  one that answers the question precisely   Dynamic types with JSON NET  There is way too much for re-posting it all here  and even less point since that article has an attachment with the key required source file

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NET 4 0 has a built-in library to do this   using System Web Script Serialization  JavaScriptSerializer jss   new JavaScriptSerializer    var d   jss Deserialize lt dynamic gt  str     This is the simplest way

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You can use using Newtonsoft Json  var jRoot     JsonConvert DeserializeObject lt dynamic gt  Encoding UTF8 GetString resolvedEvent Event Data      resolvedEvent Event Data is my response getting from calling core Event

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There is a lightweight JSON library for C  called SimpleJson   It supports  NET 3 5   Silverlight and Windows Phone 7   It supports dynamic for  NET 4 0  It can also be installed as a NuGet package  Install-Package SimpleJson

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It s pretty simple using Json NET   dynamic stuff   JsonConvert DeserializeObject     Name    Jon Smith    Address      City    New York    State    NY      Age   42       string name   stuff Name  string address   stuff Address City    Also using Newtonsoft Json Linq   dynamic stuff   JObject Parse     Name    Jon Smith    Address      City    New York    State    NY      Age   42       string name   stuff Name  string address   stuff Address City    Documentation  Querying JSON with dynamic

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The object you want DynamicJSONObject is included in the System Web Helpers dll from the ASP NET Web Pages package  which is part of WebMatrix

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Another way using Newtonsoft Json   dynamic stuff   Newtonsoft Json JsonConvert DeserializeObject    color   red   value  5      string color   stuff color  int value   stuff value

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You can extend the JavaScriptSerializer to recursively copy the dictionary it created to expando object s  and then use them dynamically   static class JavaScriptSerializerExtensions       public static dynamic DeserializeDynamic this JavaScriptSerializer serializer  string value                var dictionary   serializer Deserialize lt IDictionary lt string  object gt  gt  value           return GetExpando dictionary              private static ExpandoObject GetExpando IDictionary lt string  object gt  dictionary                var expando    IDictionary lt string  object gt  new ExpandoObject             foreach  var item in dictionary                        var innerDictionary   item Value as IDictionary lt string  object gt               if  innerDictionary    null                                expando Add item Key  GetExpando innerDictionary                              else                               expando Add item Key  item Value                                    return  ExpandoObject expando            Then you just need to having a using statement for the namespace you defined the extension in  consider just defining them in System Web Script Serialization    another trick is to not use a namespace  then you don t need the using statement at all  and you can consume them like so   var serializer   new JavaScriptSerializer    var value   serializer DeserializeDynamic     Name    Jon Smith    Address      City    New York    State    NY      Age   42       var name    string value Name     Jon Smith var age    int value Age          42  var address   value Address  var city    string address City       New York var state    string address State     NY

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JsonFx can deserialize JSON content into dynamic objects      Serialize to from dynamic types  default for  NET 4 0     var reader   new JsonReader    var writer   new JsonWriter     string input         foo    true    array      42  false    Hello     null       dynamic output   reader Read input   Console WriteLine output array 0       42 string json   writer Write output   Console WriteLine json        foo  true  array   42 false  Hello   null

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You can do this using System Web Helpers Json - its Decode method returns a dynamic object which you can traverse as you like   It s included in the System Web Helpers assembly   NET 4 0    var dynamicObject   Json Decode jsonString

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I am using like this in my code and it s working fine  using System Web Script Serialization  JavaScriptSerializer oJS   new JavaScriptSerializer    RootObject oRootObject   new RootObject    oRootObject   oJS Deserialize lt RootObject gt  Your JSon String

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Use DataSet C   with JavaScript  A simple function for creating a JSON stream with DataSet input  Create JSON content like  multi table dataset       a 1 b 2 c 3   a 3 b 5 c 6     a 23 b 45 c 35   a 58 b 59 c 45      Just client side  use eval  For example   var d   eval     a 1 b 2 c 3   a 3 b 5 c 6     a 23 b 45 c 35   a 58 b 59 c 45        Then use   d 0  0  a    out 1 from table 0 row 0  d 1  1  b    out 59 from table 1 row 1     Created by Behnam Mohammadi And Saeed Ahmadian public string jsonMini DataSet ds        int t   0  r   0  c   0      string stream             for  t   0  t  lt  ds Tables Count  t                  stream                 for  r   0  r  lt  ds Tables t  Rows Count  r                          stream                     for  c   0  c  lt  ds Tables t  Columns Count  c                                  stream    ds Tables t  Columns c  ToString                                      ds Tables t  Rows r  c  ToString                                     if  c gt 0                  stream   stream Substring 0  stream Length - 1               stream                            if  r gt 0              stream   stream Substring 0  stream Length - 1           stream                    if  t gt 0          stream   stream Substring 0  stream Length - 1       stream              return stream

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With Cinchoo ETL - an open source library available to parse JSON into a dynamic object   string json             key1                              action      open                  timestamp      2018-09-05 20 46 00                  url    null                ip      66 102 6 98                       using  var p   ChoJSONReader LoadText json       WithJSONPath                    foreach  var rec in p                Console WriteLine  Action      rec action           Console WriteLine  Timestamp      rec timestamp           Console WriteLine  URL      rec url           Console WriteLine  IP address      rec ip             Output   Action  open Timestamp  2018-09-05 20 46 00 URL  http   www google com IP address  66 102 6 98   Disclaimer  I m the author of this library

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Deserializing in JSON NET can be dynamic using the JObject class  which is included in that library   My JSON string represents these classes   public class Foo      public int Age  get set      public Bar Bar  get set      public class Bar      public DateTime BDay  get set       Now we deserialize the string WITHOUT referencing the above classes   var dyn   JsonConvert DeserializeObject lt JObject gt  jsonAsFooString    JProperty propAge   dyn Properties   FirstOrDefault i  gt i Name     Age    if propAge    null        int age   int Parse propAge Value ToString         Console WriteLine  age     age        or as a one-liner  int myage   int Parse dyn Properties   First i  gt i Name     Age   Value ToString       Or if you want to go deeper   var propBar   dyn Properties   FirstOrDefault i  gt i Name     Bar    if propBar    null        JObject o    JObject propBar First        var propBDay   o Properties   FirstOrDefault  i   gt  i Name   BDay        if propBDay    null            DateTime bday   DateTime Parse propBDay Value ToString             Console WriteLine  birthday     bday ToString  MM dd yyyy                or as a one-liner  DateTime mybday   DateTime Parse   JObject dyn Properties   First i  gt i Name     Bar   First    Properties   First i  gt i Name     BDay   Value ToString       See post for a complete example

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For that I would use JSON NET to do the low-level parsing of the JSON stream and then build up the object hierarchy out of instances of the ExpandoObject class

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I made a new version of the DynamicJsonConverter that uses Expando Objects  I used expando objects  because I wanted to Serialize the dynamic back into JSON using Json NET   using System  using System Collections  using System Collections Generic  using System Collections ObjectModel  using System Dynamic  using System Web Script Serialization   public static class DynamicJson       public static dynamic Parse string json                JavaScriptSerializer jss   new JavaScriptSerializer            jss RegisterConverters new JavaScriptConverter     new DynamicJsonConverter                dynamic glossaryEntry   jss Deserialize json  typeof object   as dynamic          return glossaryEntry             class DynamicJsonConverter   JavaScriptConverter               public override object Deserialize IDictionary lt string  object gt  dictionary  Type type  JavaScriptSerializer serializer                        if  dictionary    null                  throw new ArgumentNullException  dictionary                 var result   ToExpando dictionary                return type    typeof object    result   null                     private static ExpandoObject ToExpando IDictionary lt string  object gt  dictionary                        var result   new ExpandoObject                var dic   result as IDictionary lt String  object gt                foreach  var item in dictionary                                var valueAsDic   item Value as IDictionary lt string  object gt                   if  valueAsDic    null                                        dic Add item Key  ToExpando valueAsDic                        continue                                    var arrayList   item Value as ArrayList                  if  arrayList    null  amp  amp  arrayList Count  gt  0                                        dic Add item Key  ToExpando arrayList                        continue                                     dic Add item Key  item Value                             return result                     private static ArrayList ToExpando ArrayList obj                        ArrayList result   new ArrayList                 foreach  var item in obj                                var valueAsDic   item as IDictionary lt string  object gt                   if  valueAsDic    null                                        result Add ToExpando valueAsDic                        continue                                     var arrayList   item as ArrayList                  if  arrayList    null  amp  amp  arrayList Count  gt  0                                        result Add ToExpando arrayList                        continue                                     result Add item                             return result                     public override IDictionary lt string  object gt  Serialize object obj  JavaScriptSerializer serializer                        throw new NotImplementedException                       public override IEnumerable lt Type gt  SupportedTypes                       get   return new ReadOnlyCollection lt Type gt  new List lt Type gt  new     typeof object

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Creating dynamic objects with Newtonsoft Json works really great    json is your string containing the JSON value dynamic data   JsonConvert DeserializeObject lt dynamic gt  json    Now you can access the data object just like if it was a regular object  This is the JSON object we currently have as an example     quot ID quot  123  quot Name quot   quot Jack quot   quot Numbers quot   1  2  3     This is how you access it after deserialization  data ID   Retrieve the int data Name   Retrieve the string data Numbers 0    Retrieve the first element in the array

[c#] Deserialize JSON into C# dynamic object?

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