Deserializing a JSON file with JavaScriptSerializer

Question

the json file s structure which I will deserialize looks like below          id     1lad07        text     test        url     http     twitpic com  1lacuz        width    220       height    84       size    8722       type     png        timestamp     Wed  05 May 2010 16 11 48  0000        user               id    12345           screen name     twitpicuser            I have created a class which has the filed names as properties for JavaScriptSerializer  The code which I will use to Deserialize the json is as follows               using  var reader   new StreamReader twitpicResponse GetResponseStream                         var responseBody   reader ReadToEnd                    var deserializer   new JavaScriptSerializer                    var results   deserializer Deserialize lt Response gt  responseBody                    My problem is how I can read the user field on json file  which is like below    user           id    12345       screen name     twitpicuser      it has sub properties and values  how can I name them on my Response class  my response class now look like this   public class Response        public string id   get  set        public string text   get  set        public string url   get  set        public string width   get  set        public string height   get  set        public string size   get  set        public string type   get  set        public string timestamp   get  set         what is the best case to do it

User · Answer

public class User   List lt UserData gt                 public int id   get  set            public string screen name   get  set                 string json   client DownloadString url       JavaScriptSerializer serializer   new JavaScriptSerializer        var Data   serializer Deserialize lt List lt UserData gt  gt  json

User · Answer

You need to create a class that holds the user values  just like the response class User  Add a property to the Response class  user  with the type of the new class for the user values User   public class Response        public string id   get  set        public string text   get  set        public string url   get  set        public string width   get  set        public string height   get  set        public string size   get  set        public string type   get  set        public string timestamp   get  set        public User user   get  set        public class User        public int id   get  set        public string screen name   get  set          In general you should make sure the property types of the json and your CLR classes match up  It seems that the structure that you re trying to deserialize contains multiple number values  most likely int   I m not sure if the JavaScriptSerializer is able to deserialize numbers into string fields automatically  but you should try to match your CLR type as close to the actual data as possible anyway

User · Answer

Page load starts here  var json   new System Web Script Serialization JavaScriptSerializer   Serialize new       api key    my key       action    categories       store id    my store       var json2       api key     my key     action     categories     store id     my store     user        id     12345   screen name       twitpicuser       var list   new System Web Script Serialization JavaScriptSerializer   Deserialize lt FooBar gt  json   var list2   new System Web Script Serialization JavaScriptSerializer   Deserialize lt FooBar gt  json2    string a   list2 action  var b   list2 user  string c   b screen name     Page load ends here  public class FooBar       public string api key   get  set        public string action   get  set        public string store id   get  set        public User user   get  set       public class User       public int id   get  set        public string screen name   get  set

User · Answer

For  Net 4    string s        user            id     12345       screen name       twitpicuser        var serializer   new JavaScriptSerializer    dynamic usr   serializer DeserializeObject s   var UserId   usr  user    id      For  Net 2 3 5  This code should work on JSON with 1 level  samplejson aspx   lt    Page Language  C     gt   lt    Import Namespace  System Globalization    gt   lt    Import Namespace  System Web Script Serialization    gt   lt    Import Namespace  System Collections Generic    gt   lt   string s        id     12345       screen name       twitpicuser      var serializer   new JavaScriptSerializer    Dictionary lt string  object gt  result    serializer DeserializeObject s  as Dictionary lt string  object gt    var UserId   result  id       gt    lt   UserId   gt    And for a 2 level JSON   sample2 aspx   lt    Page Language  C     gt   lt    Import Namespace  System Globalization    gt   lt    Import Namespace  System Web Script Serialization    gt   lt    Import Namespace  System Collections Generic    gt   lt   string s        user            id     12345       screen name       twitpicuser       var serializer   new JavaScriptSerializer    Dictionary lt string  object gt  result    serializer DeserializeObject s  as Dictionary lt string  object gt    Dictionary lt string  object gt  usr    result  user   as Dictionary lt string  object gt    var UserId   usr  id       gt    lt    UserId   gt

User · Answer

Assuming you don t want to create another class  you can always let the deserializer give you a dictionary of key-value-pairs  like so   string s        user          id    12345      screen name     twitpicuser     var serializer   new JavaScriptSerializer    var result   serializer DeserializeObject s     You ll get back something  where you can do   var userId   int Parse result  user    id        or  int result  user    id   depending on how the JSON is serialized     etc    Look at result in the debugger to see  what s in there

User · Answer

Create a sub-class User with an id field and screen name field  like this   public class User       public string id   get  set        public string screen name   get  set       public class Response        public string id   get  set        public string text   get  set        public string url   get  set        public string width   get  set        public string height   get  set        public string size   get  set        public string type   get  set        public string timestamp   get  set        public User user   get  set

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