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Using JSON. NET for dynamic JSON parsing. With the release of ASP. NET Web API as part of .
NET 4. 5 and MVC 4. JSON. NET has effectively pushed out the . NET native serializers to become the default serializer for Web API. JSON. NET is vastly more flexible than the built in Data. Contract. Json. Serializer or the older Java. Script serializer. The Data. Contract.
Serializer in particular has been very problematic in the past because it can't deal with untyped objects for serialization - like values of type object, or anonymous types which are quite common these days. The Java. Script Serializer that came before it actually does support non- typed objects for serialization but it can't do anything with untyped data coming in from Java. Script and it's overall model of extensibility was pretty limited (Java. Script Serializer is what MVC uses for JSON responses).
JSON. NET provides a robust JSON serializer that has both high level and low level components, supports binary JSON, JSON contracts, Xml to JSON conversion, LINQ to JSON and many, many more features than either of the built in serializers. ASP. NET Web API now uses JSON. NET as its default serializer and is now pulled in as a Nu. Get dependency into Web API projects, which is great. Dynamic JSON Parsing.
One of the features that I think is getting ever more important is the ability to serialize and deserialize arbitrary JSON content dynamically - that is without mapping the JSON captured directly into a . NET type as Data. Contract. Serializer or the Java.
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to. With the release of ASP.NET Web API as part of.NET 4.5 and MVC 4.0, JSON.NET has effectively pushed out the.NET native serializers to become the default serializer. I am looking for the clean, elegant and smart solution to remove namespacees from all XML elements? How would function to do that look like?
Script Serializers do. Sometimes it isn't possible to map types due to the differences in languages (think collections, dictionaries etc), and other times you simply don't have the structures in place or don't want to create them to actually import the data. If this topic sounds familiar - you're right! I wrote about dynamic JSON parsing a few months back before JSON. NET was added to Web API and when Web API and the System. Net Http. Client libraries included the System. Json classes like Json.
Object and Json. Array. With the inclusion of JSON. NET in Web API these classes are now obsolete and didn't ship with Web API or the client libraries. I re- linked my original post to this one. In this post I'll discus JToken, JObject and JArray which are the dynamic JSON objects that make it very easy to create and retrieve JSON content on the fly without underlying types. Why Dynamic JSON?
So, why Dynamic JSON parsing rather than strongly typed parsing? Since applications are interacting more and more with third party services it becomes ever more important to have easy access to those services with easy JSON parsing. Sometimes it just makes lot of sense to pull just a small amount of data out of large JSON document received from a service, because the third party service isn't directly related to your application's logic most of the time - and it makes little sense to map the entire service structure in your application. For example, recently I worked with the Google Maps Places API to return information about businesses close to me (or rather the app's) location. The Google API returns a ton of information that my application had no interest in - all I needed was few values out of the data.
Dynamic JSON parsing makes it possible to map this data, without having to map the entire API to a C# data structure. Instead I could pull out the three or four values I needed from the API and directly store it on my business entities that needed to receive the data - no need to map the entire Maps API structure. Getting JSON. NETThe easiest way to use JSON. NET is to grab it via Nu. Get and add it as a reference to your project. You can add it to your project with: PM> Install- Package Newtonsoft. Json. From the Package Manager Console or by using Manage Nu.
Get Packages in your project References. As mentioned if you're using ASP. NET Web API or MVC 4 JSON. NET will be automatically added to your project. Alternately you can also go to the Code. Plex site and download the latest version including source code: http: //json. Creating JSON on the fly with JObject and JArray.
Let's start with creating some JSON on the fly. It's super easy to create a dynamic object structure with any of the JToken derived JSON. NET objects. The most common JToken derived classes you are likely to use are JObject and JArray. JToken implements IDynamic.
Meta. Provider and so uses the dynamic keyword extensively to make it intuitive to create object structures and turn them into JSON via dynamic object syntax. Here's an example of creating a music album structure with child songs using JObject for the base object and songs and JArray for the actual collection of songs. JSON. NET includes a bunch of configuration options that control how JSON is generated. Typically the defaults are just fine, but you can override with the Json. Settings object for most operations. The important thing about this code is that there's no explicit type used for holding the values to serialize to JSON.