Parsing JSON using Json net

Question

I m trying to parse some JSON using the JSon Net library   The documentation seems a little sparse and I m confused as to how to accomplish what I need   Here is the format for the JSON I need to parse through          displayFieldName     OBJECT NAME         fieldAliases               OBJECT NAME     OBJECT NAME             OBJECT TYPE     OBJECT TYPE               positionType     point         reference               id    1111              objects                 attributes                   OBJECT NAME     test name                 OBJECT TYPE     test type                       position                   x    5                y    7                       The only data I really need from this is the stuff in the objects array   Is it possible for me to parse through that with something like the JSonTextReader and just pull out the things I want  like OBJECT TYPE and the x and y position   I can t seem to get JSonTextReader to work the way I want it to and I find little to no examples of usage for it    It seems like serializing first then using LINQ with my object would be ideal and every example I find discusses serializing the JSON first  but I m not sure how I would build an object for this structure   Particularly the objects array which would need to be something like a list of Pairs of attribute and position objects   I have no idea how I would code my object so JSon Net would know how to serialize that   I thought I could write my own simple parser to just pull out everything I need into an attributes object that I created  but I m having little luck     Hopefully this all makes sense  any ideas

User · Answer

This question came up high on a search engine result  but I ended up using a different approach  Adding an answer to this old question in case other people with similar questions read this   You can solve this with Json Net and make an extension method to handle the items you want to loop   public static Tuple lt string  int  int gt  ToTuple this JToken token        var type   token  attributes    OBJECT TYPE   ToString        var x   token  position    x   Value lt int gt         var y   token  position    y   Value lt int gt         return new Tuple lt string  int  int gt  type  x  y       And then access the data like this   scenario  writing to console    var tuples   JObject Parse myJsonString   objects   Select item   gt  item ToTuple    ToList    tuples ForEach t   gt  Console WriteLine   0     1   2     t Item1  t Item2  t Item3

User · Answer

I don t know about JSON NET  but it works fine with JavaScriptSerializer from System Web Extensions dll   NET 3 5 SP1    using System Collections Generic  using System Web Script Serialization  public class NameTypePair       public string OBJECT NAME   get  set        public string OBJECT TYPE   get  set      public enum PositionType   none  point   public class Ref       public int id   get  set      public class SubObject       public NameTypePair attributes   get  set        public Position position   get  set      public class Position       public int x   get  set        public int y   get  set      public class Foo       public Foo     objects   new List lt SubObject gt           public string displayFieldName   get  set        public NameTypePair fieldAliases   get  set        public PositionType positionType   get  set        public Ref reference   get  set        public List lt SubObject gt  objects   get  set      static class Program        const string json           displayFieldName       OBJECT NAME         fieldAliases             OBJECT NAME       OBJECT NAME           OBJECT TYPE       OBJECT TYPE             positionType       point         reference             id     1111           objects                     attributes                 OBJECT NAME       test name               OBJECT TYPE       test type                     position                        x     5             y     7                             static void Main                 JavaScriptSerializer ser   new JavaScriptSerializer            Foo foo   ser Deserialize lt Foo gt  json               Edit   Json NET works using the same JSON and classes   Foo foo   JsonConvert DeserializeObject lt Foo gt  json     Link  Serializing and Deserializing JSON with Json NET

User · Answer

This method takes in JSON in the form returned by javascript s        JSON stringify Object  and returns a string- gt string dictionary         This method may be of use when the format of the json is unknown         You can modify the delimiters  etc pretty easily in the source         sorry I didn t abstract it--I have a very specific use                public static Dictionary lt string  string gt  jsonParse string rawjson                Dictionary lt string  string gt  outdict   new Dictionary lt string  string gt             StringBuilder keybufferbuilder   new StringBuilder            StringBuilder valuebufferbuilder   new StringBuilder            StringReader bufferreader   new StringReader rawjson            int s   0          bool reading   false          bool inside string   false          bool reading value   false            break at end  returns -1          while  s  gt   0                        s   bufferreader Read                  opening of json             if   reading                                if   char s         amp  amp   inside string  amp  amp   reading  reading   true                  continue                            else                                 if we find a quote and we are not yet inside a string  advance and get inside                 if   inside string                                          read past the quote                     if   char s          inside string   true                      continue                                    if  inside string                                          if we reached the end of the string                     if   char s                                                        inside string   false                          s   bufferreader Read      advance pointer                         if   char s                                                               reading value   true                              continue                                                    if  reading value  amp  amp   char s                                                                 we know we just ended the line  so put itin our dictionary                             if   outdict ContainsKey keybufferbuilder ToString     outdict Add keybufferbuilder ToString    valuebufferbuilder ToString                                   and clear the buffers                             keybufferbuilder Clear                                valuebufferbuilder Clear                                reading value   false                                                    if  reading value  amp  amp   char s                                                                 we know we just ended the line  so put itin our dictionary                             if   outdict ContainsKey keybufferbuilder ToString     outdict Add keybufferbuilder ToString    valuebufferbuilder ToString                                   and clear the buffers                             keybufferbuilder Clear                                valuebufferbuilder Clear                                reading value   false                              reading   false                              break                                                                      else                                               if  reading value                                                        valuebufferbuilder Append  char s                               continue                                                    else                                                       keybufferbuilder Append  char s                               continue                                                                                    else                                       switch   char s                                                case                                  reading value   true                              break                          default                              if  reading value                                                                valuebufferbuilder Append  char s                                                             else                                                               keybufferbuilder Append  char s                                                             break                                                                          return outdict

User · Answer

This question came up high on a search engine result  but I ended up using a different approach  Adding an answer to this old question in case other people with similar questions read this   You can solve this with Json Net and make an extension method to handle the items you want to loop   public static Tuple lt string  int  int gt  ToTuple this JToken token        var type   token  attributes    OBJECT TYPE   ToString        var x   token  position    x   Value lt int gt         var y   token  position    y   Value lt int gt         return new Tuple lt string  int  int gt  type  x  y       And then access the data like this   scenario  writing to console    var tuples   JObject Parse myJsonString   objects   Select item   gt  item ToTuple    ToList    tuples ForEach t   gt  Console WriteLine   0     1   2     t Item1  t Item2  t Item3

User · Answer

I don t know about JSON NET  but it works fine with JavaScriptSerializer from System Web Extensions dll   NET 3 5 SP1    using System Collections Generic  using System Web Script Serialization  public class NameTypePair       public string OBJECT NAME   get  set        public string OBJECT TYPE   get  set      public enum PositionType   none  point   public class Ref       public int id   get  set      public class SubObject       public NameTypePair attributes   get  set        public Position position   get  set      public class Position       public int x   get  set        public int y   get  set      public class Foo       public Foo     objects   new List lt SubObject gt           public string displayFieldName   get  set        public NameTypePair fieldAliases   get  set        public PositionType positionType   get  set        public Ref reference   get  set        public List lt SubObject gt  objects   get  set      static class Program        const string json           displayFieldName       OBJECT NAME         fieldAliases             OBJECT NAME       OBJECT NAME           OBJECT TYPE       OBJECT TYPE             positionType       point         reference             id     1111           objects                     attributes                 OBJECT NAME       test name               OBJECT TYPE       test type                     position                        x     5             y     7                             static void Main                 JavaScriptSerializer ser   new JavaScriptSerializer            Foo foo   ser Deserialize lt Foo gt  json               Edit   Json NET works using the same JSON and classes   Foo foo   JsonConvert DeserializeObject lt Foo gt  json     Link  Serializing and Deserializing JSON with Json NET

User · Answer

This method takes in JSON in the form returned by javascript s        JSON stringify Object  and returns a string- gt string dictionary         This method may be of use when the format of the json is unknown         You can modify the delimiters  etc pretty easily in the source         sorry I didn t abstract it--I have a very specific use                public static Dictionary lt string  string gt  jsonParse string rawjson                Dictionary lt string  string gt  outdict   new Dictionary lt string  string gt             StringBuilder keybufferbuilder   new StringBuilder            StringBuilder valuebufferbuilder   new StringBuilder            StringReader bufferreader   new StringReader rawjson            int s   0          bool reading   false          bool inside string   false          bool reading value   false            break at end  returns -1          while  s  gt   0                        s   bufferreader Read                  opening of json             if   reading                                if   char s         amp  amp   inside string  amp  amp   reading  reading   true                  continue                            else                                 if we find a quote and we are not yet inside a string  advance and get inside                 if   inside string                                          read past the quote                     if   char s          inside string   true                      continue                                    if  inside string                                          if we reached the end of the string                     if   char s                                                        inside string   false                          s   bufferreader Read      advance pointer                         if   char s                                                               reading value   true                              continue                                                    if  reading value  amp  amp   char s                                                                 we know we just ended the line  so put itin our dictionary                             if   outdict ContainsKey keybufferbuilder ToString     outdict Add keybufferbuilder ToString    valuebufferbuilder ToString                                   and clear the buffers                             keybufferbuilder Clear                                valuebufferbuilder Clear                                reading value   false                                                    if  reading value  amp  amp   char s                                                                 we know we just ended the line  so put itin our dictionary                             if   outdict ContainsKey keybufferbuilder ToString     outdict Add keybufferbuilder ToString    valuebufferbuilder ToString                                   and clear the buffers                             keybufferbuilder Clear                                valuebufferbuilder Clear                                reading value   false                              reading   false                              break                                                                      else                                               if  reading value                                                        valuebufferbuilder Append  char s                               continue                                                    else                                                       keybufferbuilder Append  char s                               continue                                                                                    else                                       switch   char s                                                case                                  reading value   true                              break                          default                              if  reading value                                                                valuebufferbuilder Append  char s                                                             else                                                               keybufferbuilder Append  char s                                                             break                                                                          return outdict

User · Answer

You use the JSON class and then call the GetData   function        lt summary gt      This class encodes and decodes JSON strings      Spec  details  see http   www json org          JSON uses Arrays and Objects  These correspond here to the datatypes ArrayList and Hashtable      All numbers are parsed to doubles       lt  summary gt      using System      using System Collections      using System Globalization      using System Text   public class JSON       public const int TOKEN NONE   0      public const int TOKEN CURLY OPEN   1      public const int TOKEN CURLY CLOSE   2      public const int TOKEN SQUARED OPEN   3      public const int TOKEN SQUARED CLOSE   4      public const int TOKEN COLON   5      public const int TOKEN COMMA   6      public const int TOKEN STRING   7      public const int TOKEN NUMBER   8      public const int TOKEN TRUE   9      public const int TOKEN FALSE   10      public const int TOKEN NULL   11       private const int BUILDER CAPACITY   2000            lt summary gt          Parses the string json into a value          lt  summary gt           lt param name  json  gt A JSON string  lt  param gt           lt returns gt An ArrayList  a Hashtable  a double  a string  null  true  or false lt  returns gt      public static object JsonDecode string json                bool success   true           return JsonDecode json  ref success                   lt summary gt          Parses the string json into a value  and fills  success  with the successfullness of the parse           lt  summary gt           lt param name  json  gt A JSON string  lt  param gt           lt param name  success  gt Successful parse  lt  param gt           lt returns gt An ArrayList  a Hashtable  a double  a string  null  true  or false lt  returns gt      public static object JsonDecode string json  ref bool success                success   true          if  json    null                char   charArray   json ToCharArray                int index   0              object value   ParseValue charArray  ref index  ref success               return value            else               return null                            lt summary gt          Converts a Hashtable   ArrayList object into a JSON string          lt  summary gt           lt param name  json  gt A Hashtable   ArrayList lt  param gt           lt returns gt A JSON encoded string  or null if object  json  is not serializable lt  returns gt      public static string JsonEncode object json                StringBuilder builder   new StringBuilder BUILDER CAPACITY           bool success   SerializeValue json  builder           return  success   builder ToString     null              protected static Hashtable ParseObject char   json  ref int index  ref bool success                Hashtable table   new Hashtable            int token                        NextToken json  ref index            bool done   false          while   done                token   LookAhead json  index               if  token    JSON TOKEN NONE                    success   false                  return null                else if  token    JSON TOKEN COMMA                    NextToken json  ref index                 else if  token    JSON TOKEN CURLY CLOSE                    NextToken json  ref index                   return table                else                       name                 string name   ParseString json  ref index  ref success                   if   success                        success   false                      return null                                                          token   NextToken json  ref index                   if  token    JSON TOKEN COLON                        success   false                      return null                                        value                 object value   ParseValue json  ref index  ref success                   if   success                        success   false                      return null                                     table name    value                                   return table             protected static ArrayList ParseArray char   json  ref int index  ref bool success                ArrayList array   new ArrayList                          NextToken json  ref index            bool done   false          while   done                int token   LookAhead json  index               if  token    JSON TOKEN NONE                    success   false                  return null                else if  token    JSON TOKEN COMMA                    NextToken json  ref index                 else if  token    JSON TOKEN SQUARED CLOSE                    NextToken json  ref index                   break                else                   object value   ParseValue json  ref index  ref success                   if   success                        return null                                     array Add value                                    return array             protected static object ParseValue char   json  ref int index  ref bool success                switch  LookAhead json  index                 case JSON TOKEN STRING                  return ParseString json  ref index  ref success               case JSON TOKEN NUMBER                  return ParseNumber json  ref index  ref success               case JSON TOKEN CURLY OPEN                  return ParseObject json  ref index  ref success               case JSON TOKEN SQUARED OPEN                  return ParseArray json  ref index  ref success               case JSON TOKEN TRUE                  NextToken json  ref index                   return true              case JSON TOKEN FALSE                  NextToken json  ref index                   return false              case JSON TOKEN NULL                  NextToken json  ref index                   return null              case JSON TOKEN NONE                  break                     success   false          return null             protected static string ParseString char   json  ref int index  ref bool success                StringBuilder s   new StringBuilder BUILDER CAPACITY           char c           EatWhitespace json  ref index                         c   json index              bool complete   false          while   complete                 if  index    json Length                    break                             c   json index                 if  c                           complete   true                  break                else if  c                             if  index    json Length                        break                                    c   json index                     if  c                               s Append                         else if  c                                s Append                          else if  c                               s Append                         else if  c     b                         s Append   b                      else if  c     f                         s Append   f                      else if  c     n                         s Append   n                      else if  c     r                         s Append   r                      else if  c     t                         s Append   t                      else if  c     u                         int remainingLength   json Length - index                      if  remainingLength  gt   4                               parse the 32 bit hex into an integer codepoint                         uint codePoint                          if    success   UInt32 TryParse new string json  index  4   NumberStyles HexNumber  CultureInfo InvariantCulture  out codePoint                                  return                                                          convert the integer codepoint to a unicode char and add to string                         s Append Char ConvertFromUtf32  int codePoint                               skip 4 chars                         index    4                        else                           break                                                         else                   s Append c                                     if   complete                success   false              return null                     return s ToString               protected static double ParseNumber char   json  ref int index  ref bool success                EatWhitespace json  ref index            int lastIndex   GetLastIndexOfNumber json  index           int charLength    lastIndex - index    1           double number          success   Double TryParse new string json  index  charLength   NumberStyles Any  CultureInfo InvariantCulture  out number            index   lastIndex   1          return number             protected static int GetLastIndexOfNumber char   json  int index                int lastIndex           for  lastIndex   index  lastIndex  lt  json Length  lastIndex                  if   0123456789 - eE  IndexOf json lastIndex      -1                    break                                  return lastIndex - 1             protected static void EatWhitespace char   json  ref int index                for    index  lt  json Length  index                  if     t n r  IndexOf json index      -1                    break                                     protected static int LookAhead char   json  int index                int saveIndex   index          return NextToken json  ref saveIndex              protected static int NextToken char   json  ref int index                EatWhitespace json  ref index            if  index    json Length                return JSON TOKEN NONE                     char c   json index           index            switch  c                case                      return JSON TOKEN CURLY OPEN              case                      return JSON TOKEN CURLY CLOSE              case                      return JSON TOKEN SQUARED OPEN              case                      return JSON TOKEN SQUARED CLOSE              case                      return JSON TOKEN COMMA              case                      return JSON TOKEN STRING              case  0   case  1   case  2   case  3   case  4               case  5   case  6   case  7   case  8   case  9               case  -                   return JSON TOKEN NUMBER              case                      return JSON TOKEN COLON                    index--           int remainingLength   json Length - index              false         if  remainingLength  gt   5                if  json index      f   amp  amp                  json index   1      a   amp  amp                  json index   2      l   amp  amp                  json index   3      s   amp  amp                  json index   4      e                     index    5                  return JSON TOKEN FALSE                                      true         if  remainingLength  gt   4                if  json index      t   amp  amp                  json index   1      r   amp  amp                  json index   2      u   amp  amp                  json index   3      e                     index    4                  return JSON TOKEN TRUE                                      null         if  remainingLength  gt   4                if  json index      n   amp  amp                  json index   1      u   amp  amp                  json index   2      l   amp  amp                  json index   3      l                     index    4                  return JSON TOKEN NULL                                   return JSON TOKEN NONE             protected static bool SerializeValue object value  StringBuilder builder                bool success   true           if  value is string                success   SerializeString  string value  builder             else if  value is Hashtable                success   SerializeObject  Hashtable value  builder             else if  value is ArrayList                success   SerializeArray  ArrayList value  builder             else if   value is Boolean   amp  amp    Boolean value    true                 builder Append  true              else if   value is Boolean   amp  amp    Boolean value    false                 builder Append  false              else if  value is ValueType                   thanks to ritchie for pointing out ValueType to me             success   SerializeNumber Convert ToDouble value   builder             else if  value    null                builder Append  null              else               success   false                    return success             protected static bool SerializeObject Hashtable anObject  StringBuilder builder                builder Append                IDictionaryEnumerator e   anObject GetEnumerator            bool first   true          while  e MoveNext                  string key   e Key ToString                object value   e Value               if   first                    builder Append                                   SerializeString key  builder               builder Append                   if   SerializeValue value  builder                     return false                             first   false                     builder Append               return true             protected static bool SerializeArray ArrayList anArray  StringBuilder builder                builder Append                bool first   true          for  int i   0  i  lt  anArray Count  i                  object value   anArray i                if   first                    builder Append                                   if   SerializeValue value  builder                     return false                             first   false                     builder Append               return true             protected static bool SerializeString string aString  StringBuilder builder                builder Append                 char   charArray   aString ToCharArray            for  int i   0  i  lt  charArray Length  i                  char c   charArray i               if  c                           builder Append                        else if  c                            builder Append                        else if  c      b                     builder Append    b                  else if  c      f                     builder Append    f                  else if  c      n                     builder Append    n                  else if  c      r                     builder Append    r                  else if  c      t                     builder Append    t                  else                   int codepoint   Convert ToInt32 c                   if   codepoint  gt   32   amp  amp   codepoint  lt   126                         builder Append c                     else                       builder Append    u    Convert ToString codepoint  16  PadLeft 4   0                                                        builder Append                return true             protected static bool SerializeNumber double number  StringBuilder builder                builder Append Convert ToString number  CultureInfo InvariantCulture            return true             parse and show entire json in key-value pair     Hashtable HTList    Hashtable JSON JsonDecode  completejsonstring            public void GetData Hashtable HT                                   IDictionaryEnumerator ienum   HT GetEnumerator                while  ienum MoveNext                                  if  ienum Value is ArrayList                                        ArrayList arnew    ArrayList ienum Value                      foreach  object obj in arnew                                                                    Hashtable hstemp    Hashtable obj                          GetData hstemp                                                           else                                       Console WriteLine ienum Key         ienum Value

User · Answer

Edit  Thanks Marc  read up on the struct vs class issue and you re right  thank you   I tend to use the following method for doing what you describe  using a static method of JSon Net   MyObject deserializedObject   JsonConvert DeserializeObject lt MyObject gt  json     Link  Serializing and Deserializing JSON with Json NET  For the Objects list  may I suggest using generic lists out made out of your own small class containing attributes and position class  You can use the Point struct in System Drawing  System Drawing Point or System Drawing PointF for floating point numbers  for you X and Y   After object creation it s much easier to get the data you re after vs  the text parsing you re otherwise looking at

User · Answer

Edit  Thanks Marc  read up on the struct vs class issue and you re right  thank you   I tend to use the following method for doing what you describe  using a static method of JSon Net   MyObject deserializedObject   JsonConvert DeserializeObject lt MyObject gt  json     Link  Serializing and Deserializing JSON with Json NET  For the Objects list  may I suggest using generic lists out made out of your own small class containing attributes and position class  You can use the Point struct in System Drawing  System Drawing Point or System Drawing PointF for floating point numbers  for you X and Y   After object creation it s much easier to get the data you re after vs  the text parsing you re otherwise looking at

User · Answer

Edit  Thanks Marc  read up on the struct vs class issue and you re right  thank you   I tend to use the following method for doing what you describe  using a static method of JSon Net   MyObject deserializedObject   JsonConvert DeserializeObject lt MyObject gt  json     Link  Serializing and Deserializing JSON with Json NET  For the Objects list  may I suggest using generic lists out made out of your own small class containing attributes and position class  You can use the Point struct in System Drawing  System Drawing Point or System Drawing PointF for floating point numbers  for you X and Y   After object creation it s much easier to get the data you re after vs  the text parsing you re otherwise looking at

User · Answer

Edit  Thanks Marc  read up on the struct vs class issue and you re right  thank you   I tend to use the following method for doing what you describe  using a static method of JSon Net   MyObject deserializedObject   JsonConvert DeserializeObject lt MyObject gt  json     Link  Serializing and Deserializing JSON with Json NET  For the Objects list  may I suggest using generic lists out made out of your own small class containing attributes and position class  You can use the Point struct in System Drawing  System Drawing Point or System Drawing PointF for floating point numbers  for you X and Y   After object creation it s much easier to get the data you re after vs  the text parsing you re otherwise looking at

User · Answer

You use the JSON class and then call the GetData   function        lt summary gt      This class encodes and decodes JSON strings      Spec  details  see http   www json org          JSON uses Arrays and Objects  These correspond here to the datatypes ArrayList and Hashtable      All numbers are parsed to doubles       lt  summary gt      using System      using System Collections      using System Globalization      using System Text   public class JSON       public const int TOKEN NONE   0      public const int TOKEN CURLY OPEN   1      public const int TOKEN CURLY CLOSE   2      public const int TOKEN SQUARED OPEN   3      public const int TOKEN SQUARED CLOSE   4      public const int TOKEN COLON   5      public const int TOKEN COMMA   6      public const int TOKEN STRING   7      public const int TOKEN NUMBER   8      public const int TOKEN TRUE   9      public const int TOKEN FALSE   10      public const int TOKEN NULL   11       private const int BUILDER CAPACITY   2000            lt summary gt          Parses the string json into a value          lt  summary gt           lt param name  json  gt A JSON string  lt  param gt           lt returns gt An ArrayList  a Hashtable  a double  a string  null  true  or false lt  returns gt      public static object JsonDecode string json                bool success   true           return JsonDecode json  ref success                   lt summary gt          Parses the string json into a value  and fills  success  with the successfullness of the parse           lt  summary gt           lt param name  json  gt A JSON string  lt  param gt           lt param name  success  gt Successful parse  lt  param gt           lt returns gt An ArrayList  a Hashtable  a double  a string  null  true  or false lt  returns gt      public static object JsonDecode string json  ref bool success                success   true          if  json    null                char   charArray   json ToCharArray                int index   0              object value   ParseValue charArray  ref index  ref success               return value            else               return null                            lt summary gt          Converts a Hashtable   ArrayList object into a JSON string          lt  summary gt           lt param name  json  gt A Hashtable   ArrayList lt  param gt           lt returns gt A JSON encoded string  or null if object  json  is not serializable lt  returns gt      public static string JsonEncode object json                StringBuilder builder   new StringBuilder BUILDER CAPACITY           bool success   SerializeValue json  builder           return  success   builder ToString     null              protected static Hashtable ParseObject char   json  ref int index  ref bool success                Hashtable table   new Hashtable            int token                        NextToken json  ref index            bool done   false          while   done                token   LookAhead json  index               if  token    JSON TOKEN NONE                    success   false                  return null                else if  token    JSON TOKEN COMMA                    NextToken json  ref index                 else if  token    JSON TOKEN CURLY CLOSE                    NextToken json  ref index                   return table                else                       name                 string name   ParseString json  ref index  ref success                   if   success                        success   false                      return null                                                          token   NextToken json  ref index                   if  token    JSON TOKEN COLON                        success   false                      return null                                        value                 object value   ParseValue json  ref index  ref success                   if   success                        success   false                      return null                                     table name    value                                   return table             protected static ArrayList ParseArray char   json  ref int index  ref bool success                ArrayList array   new ArrayList                          NextToken json  ref index            bool done   false          while   done                int token   LookAhead json  index               if  token    JSON TOKEN NONE                    success   false                  return null                else if  token    JSON TOKEN COMMA                    NextToken json  ref index                 else if  token    JSON TOKEN SQUARED CLOSE                    NextToken json  ref index                   break                else                   object value   ParseValue json  ref index  ref success                   if   success                        return null                                     array Add value                                    return array             protected static object ParseValue char   json  ref int index  ref bool success                switch  LookAhead json  index                 case JSON TOKEN STRING                  return ParseString json  ref index  ref success               case JSON TOKEN NUMBER                  return ParseNumber json  ref index  ref success               case JSON TOKEN CURLY OPEN                  return ParseObject json  ref index  ref success               case JSON TOKEN SQUARED OPEN                  return ParseArray json  ref index  ref success               case JSON TOKEN TRUE                  NextToken json  ref index                   return true              case JSON TOKEN FALSE                  NextToken json  ref index                   return false              case JSON TOKEN NULL                  NextToken json  ref index                   return null              case JSON TOKEN NONE                  break                     success   false          return null             protected static string ParseString char   json  ref int index  ref bool success                StringBuilder s   new StringBuilder BUILDER CAPACITY           char c           EatWhitespace json  ref index                         c   json index              bool complete   false          while   complete                 if  index    json Length                    break                             c   json index                 if  c                           complete   true                  break                else if  c                             if  index    json Length                        break                                    c   json index                     if  c                               s Append                         else if  c                                s Append                          else if  c                               s Append                         else if  c     b                         s Append   b                      else if  c     f                         s Append   f                      else if  c     n                         s Append   n                      else if  c     r                         s Append   r                      else if  c     t                         s Append   t                      else if  c     u                         int remainingLength   json Length - index                      if  remainingLength  gt   4                               parse the 32 bit hex into an integer codepoint                         uint codePoint                          if    success   UInt32 TryParse new string json  index  4   NumberStyles HexNumber  CultureInfo InvariantCulture  out codePoint                                  return                                                          convert the integer codepoint to a unicode char and add to string                         s Append Char ConvertFromUtf32  int codePoint                               skip 4 chars                         index    4                        else                           break                                                         else                   s Append c                                     if   complete                success   false              return null                     return s ToString               protected static double ParseNumber char   json  ref int index  ref bool success                EatWhitespace json  ref index            int lastIndex   GetLastIndexOfNumber json  index           int charLength    lastIndex - index    1           double number          success   Double TryParse new string json  index  charLength   NumberStyles Any  CultureInfo InvariantCulture  out number            index   lastIndex   1          return number             protected static int GetLastIndexOfNumber char   json  int index                int lastIndex           for  lastIndex   index  lastIndex  lt  json Length  lastIndex                  if   0123456789 - eE  IndexOf json lastIndex      -1                    break                                  return lastIndex - 1             protected static void EatWhitespace char   json  ref int index                for    index  lt  json Length  index                  if     t n r  IndexOf json index      -1                    break                                     protected static int LookAhead char   json  int index                int saveIndex   index          return NextToken json  ref saveIndex              protected static int NextToken char   json  ref int index                EatWhitespace json  ref index            if  index    json Length                return JSON TOKEN NONE                     char c   json index           index            switch  c                case                      return JSON TOKEN CURLY OPEN              case                      return JSON TOKEN CURLY CLOSE              case                      return JSON TOKEN SQUARED OPEN              case                      return JSON TOKEN SQUARED CLOSE              case                      return JSON TOKEN COMMA              case                      return JSON TOKEN STRING              case  0   case  1   case  2   case  3   case  4               case  5   case  6   case  7   case  8   case  9               case  -                   return JSON TOKEN NUMBER              case                      return JSON TOKEN COLON                    index--           int remainingLength   json Length - index              false         if  remainingLength  gt   5                if  json index      f   amp  amp                  json index   1      a   amp  amp                  json index   2      l   amp  amp                  json index   3      s   amp  amp                  json index   4      e                     index    5                  return JSON TOKEN FALSE                                      true         if  remainingLength  gt   4                if  json index      t   amp  amp                  json index   1      r   amp  amp                  json index   2      u   amp  amp                  json index   3      e                     index    4                  return JSON TOKEN TRUE                                      null         if  remainingLength  gt   4                if  json index      n   amp  amp                  json index   1      u   amp  amp                  json index   2      l   amp  amp                  json index   3      l                     index    4                  return JSON TOKEN NULL                                   return JSON TOKEN NONE             protected static bool SerializeValue object value  StringBuilder builder                bool success   true           if  value is string                success   SerializeString  string value  builder             else if  value is Hashtable                success   SerializeObject  Hashtable value  builder             else if  value is ArrayList                success   SerializeArray  ArrayList value  builder             else if   value is Boolean   amp  amp    Boolean value    true                 builder Append  true              else if   value is Boolean   amp  amp    Boolean value    false                 builder Append  false              else if  value is ValueType                   thanks to ritchie for pointing out ValueType to me             success   SerializeNumber Convert ToDouble value   builder             else if  value    null                builder Append  null              else               success   false                    return success             protected static bool SerializeObject Hashtable anObject  StringBuilder builder                builder Append                IDictionaryEnumerator e   anObject GetEnumerator            bool first   true          while  e MoveNext                  string key   e Key ToString                object value   e Value               if   first                    builder Append                                   SerializeString key  builder               builder Append                   if   SerializeValue value  builder                     return false                             first   false                     builder Append               return true             protected static bool SerializeArray ArrayList anArray  StringBuilder builder                builder Append                bool first   true          for  int i   0  i  lt  anArray Count  i                  object value   anArray i                if   first                    builder Append                                   if   SerializeValue value  builder                     return false                             first   false                     builder Append               return true             protected static bool SerializeString string aString  StringBuilder builder                builder Append                 char   charArray   aString ToCharArray            for  int i   0  i  lt  charArray Length  i                  char c   charArray i               if  c                           builder Append                        else if  c                            builder Append                        else if  c      b                     builder Append    b                  else if  c      f                     builder Append    f                  else if  c      n                     builder Append    n                  else if  c      r                     builder Append    r                  else if  c      t                     builder Append    t                  else                   int codepoint   Convert ToInt32 c                   if   codepoint  gt   32   amp  amp   codepoint  lt   126                         builder Append c                     else                       builder Append    u    Convert ToString codepoint  16  PadLeft 4   0                                                        builder Append                return true             protected static bool SerializeNumber double number  StringBuilder builder                builder Append Convert ToString number  CultureInfo InvariantCulture            return true             parse and show entire json in key-value pair     Hashtable HTList    Hashtable JSON JsonDecode  completejsonstring            public void GetData Hashtable HT                                   IDictionaryEnumerator ienum   HT GetEnumerator                while  ienum MoveNext                                  if  ienum Value is ArrayList                                        ArrayList arnew    ArrayList ienum Value                      foreach  object obj in arnew                                                                    Hashtable hstemp    Hashtable obj                          GetData hstemp                                                           else                                       Console WriteLine ienum Key         ienum Value

User · Answer

I don t know about JSON NET  but it works fine with JavaScriptSerializer from System Web Extensions dll   NET 3 5 SP1    using System Collections Generic  using System Web Script Serialization  public class NameTypePair       public string OBJECT NAME   get  set        public string OBJECT TYPE   get  set      public enum PositionType   none  point   public class Ref       public int id   get  set      public class SubObject       public NameTypePair attributes   get  set        public Position position   get  set      public class Position       public int x   get  set        public int y   get  set      public class Foo       public Foo     objects   new List lt SubObject gt           public string displayFieldName   get  set        public NameTypePair fieldAliases   get  set        public PositionType positionType   get  set        public Ref reference   get  set        public List lt SubObject gt  objects   get  set      static class Program        const string json           displayFieldName       OBJECT NAME         fieldAliases             OBJECT NAME       OBJECT NAME           OBJECT TYPE       OBJECT TYPE             positionType       point         reference             id     1111           objects                     attributes                 OBJECT NAME       test name               OBJECT TYPE       test type                     position                        x     5             y     7                             static void Main                 JavaScriptSerializer ser   new JavaScriptSerializer            Foo foo   ser Deserialize lt Foo gt  json               Edit   Json NET works using the same JSON and classes   Foo foo   JsonConvert DeserializeObject lt Foo gt  json     Link  Serializing and Deserializing JSON with Json NET

User · Answer

I don t know about JSON NET  but it works fine with JavaScriptSerializer from System Web Extensions dll   NET 3 5 SP1    using System Collections Generic  using System Web Script Serialization  public class NameTypePair       public string OBJECT NAME   get  set        public string OBJECT TYPE   get  set      public enum PositionType   none  point   public class Ref       public int id   get  set      public class SubObject       public NameTypePair attributes   get  set        public Position position   get  set      public class Position       public int x   get  set        public int y   get  set      public class Foo       public Foo     objects   new List lt SubObject gt           public string displayFieldName   get  set        public NameTypePair fieldAliases   get  set        public PositionType positionType   get  set        public Ref reference   get  set        public List lt SubObject gt  objects   get  set      static class Program        const string json           displayFieldName       OBJECT NAME         fieldAliases             OBJECT NAME       OBJECT NAME           OBJECT TYPE       OBJECT TYPE             positionType       point         reference             id     1111           objects                     attributes                 OBJECT NAME       test name               OBJECT TYPE       test type                     position                        x     5             y     7                             static void Main                 JavaScriptSerializer ser   new JavaScriptSerializer            Foo foo   ser Deserialize lt Foo gt  json               Edit   Json NET works using the same JSON and classes   Foo foo   JsonConvert DeserializeObject lt Foo gt  json     Link  Serializing and Deserializing JSON with Json NET

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