parsing data with JSON.NET

Question

i have a json like this

"[{ "item" : { "id":1 , "name":"abc" } , "item" : { "id":1 , "name":"abc" } ]"

How can i parse the items and save them as Item(a class defined by me) in this json using (Linq) JSON.NET?

i found http://james.newtonking.com/pages/json-net.aspx but i don't know how to parse list of objects (item) considering in this case there are multiple 'item's and each 'item' is composed from other data

just FYI your JSON above is not well-formed. Not sure if it's a typo in the question or you actually copied and pasted from code. — Brian Driscoll
– Brian Driscoll, Commented Oct 19, 2011 at 15:37
@Badescu, I updated my answer to include an example of converting a list of objects in your json string to a C# representation. — Frank Hale
– Frank Hale, Commented Oct 19, 2011 at 16:22
@Brian the json was written in a hurry by hand, it has been corected. — Alex
– Alex, Commented Oct 19, 2011 at 21:56

Frank Hale · Accepted Answer · 2011-10-20 15:57:02Z

2

It's pretty simple actually:

YourClass foo = JsonConvert.DeserializeObject<YourClass>(YourJSONString);

EDIT #1:

But you asked about converting an array and I missed that. I'm sure it's still pretty easy to do even if your JSON is an array of those objects. I just wrote up this little example but I'm using a list instead of an array:

List<string> foo = new List<string>() { "Hello", "World" };

string serialized = JsonConvert.SerializeObject(foo);

List<string> bar = JsonConvert.DeserializeObject<List<string>>(serialized);

foreach (string s in bar)
{
  Console.WriteLine(s);
}

EDIT #2:

I made a change to your Json string because it wouldn't work the way you had it.

public class item
{
  public int id { get; set; }
  public string name { get; set; }
}

string json = "[{\"item\" : { \"id\":1 , \"name\":\"abc\" }} , {\"item\" : { \"id\":1 , \"name\":\"abc\"}}]";

List<item> items = JsonConvert.DeserializeObject<List<item>>(json);

edited Oct 20, 2011 at 15:57

answered Oct 19, 2011 at 15:38

Frank Hale

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6 Comments

Alex Over a year ago

thanks for the reply. what i actually don't know is how to browse the children of an json header, in my example "item". i don't know how to iterate through the json string(i.e. have some sort of 'for' so that i may parse all the items). could you please detail this if you know on my "item" example?

Frank Hale Over a year ago

I don't understand why you want to parse it by hand. If you are using Json.NET then you can just deserialize the object, manipulate the object via a foreach and then serialize the object back to Json.

Alex Over a year ago

because it doesn't work the way you showed me. Here is my code :

Alex Over a year ago

List<Restaurant> RList = JsonConvert.DeserializeObject<List<Restaurant>>(json); foreach (Restaurant R in RList) { Console.WriteLine(R.name); }

Alex Over a year ago

it says that it can't deserialize into generic list

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