What is the simplest C # function to parse a JSON string into an object?

Question

What is the simplest C # function to parse a JSON string into an object and map it (C # XAML WPF)? (for example, an object with 2 arrays - arrA and arrB)

Answer 1

DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(YourObjectType)); YourObjectType yourObject = (YourObjectType)serializer.ReadObject(jsonStream); 

You can also use the JavaScriptSerializer , but the DataContractJsonSerializer supposedly better at handling complex types.

Oddly enough, the JavaScriptSerializer was once deprecated (in 3.5) and then resurrected due to ASP.NET MVC (in 3.5 SP1). That would be enough to shake confidence and lead me to use the DataContractJsonSerializer , as it is heavily baked for WCF.

Answer 2

Just use the Json.NET library. This makes it easy to parse Json format strings:

 JObject o = JObject.Parse(@" { ""something"":""value"", ""jagged"": { ""someother"":""value2"" } }"); string something = (string)o["something"]; 

Documentation: Parsing a JSON Object Using JObject.Parse

Answer 3

I think this is what you want:

 JavaScriptSerializer JSS = new JavaScriptSerializer(); T obj = JSS.Deserialize<T>(String); 

Answer 4

You must create a structure representing the JSON keys (in case you know it for sure), and then you can easily deserialize the JSON string in your structure. In my example, I canceled the response description from the Google Cloud Message server:

 class templateResponse { public String multicast_id; public String success; public String failure; public String canonical_ids; public Result[] results; public class Result { public String message_id; public String registration_id; public String error; }; } 

Incoming JSON was:

 "\"multicast_id\":7400896764380883211,\"success\":1,\"failure\":0,\"canonical_ids\":0,\"results\":[{\"message_id\":\"0:1351777805148960%39895cf0f9fd7ecd\"}]}" 

So use

 templateResponse result = new JavaScriptSerializer().Deserialize<templateResponse>(json); 

and you get a deserialized result object

Answer 5

I would use the Json.NET library, which can convert the JSON response to an XML document. With an XML document, you can easily query XPath and extract the data you need. This is very useful to me.