C# get value from deserialized json object

Question

I'm currently Deserializing a json string using the Newtonsoft.Json nuget packet using the following code:

var data = (JObject)JsonConvert.DeserializeObject(json);

Now I'm receiving an object in the following format:

{{  "meta": {    "rap": 2098,    "count": 5  },  "data": [    {      "name": "Gold Tetramino of Mastery",      "rap": 735,      "uaid": "16601901",      "link": "https://www.roblox.com/Gold-Tetramino-of-Mastery-item?id=5786047",      "img": "https://t4.rbxcdn.com/081337d7ea86e6a406512aaa83bbcdeb",      "serial": "---",      "count": 1    },    {      "name": "Silver Tetramino of Accomplishment",      "rap": 385,      "uaid": "16601900",      "link": "https://www.roblox.com/Silver-Tetramino-of-Accomplishment-item?id=5786026",      "img": "https://t1.rbxcdn.com/60da69cd76f8dad979326f63f4a5b657",      "serial": "---",      "count": 1    },    {      "name": "Subzero Ski Specs",      "rap": 370,      "uaid": "155175547",      "link": "https://www.roblox.com/Subzero-Ski-Specs-item?id=19644587",      "img": "https://t4.rbxcdn.com/8ead2b0418ef418c7650d34103d39b6d",      "serial": "---",      "count": 1    },    {      "name": "Rusty Tetramino of Competence",      "rap": 319,      "uaid": "16601899",      "link": "https://www.roblox.com/Rusty-Tetramino-of-Competence-item?id=5785985",      "img": "https://t2.rbxcdn.com/968ad11ee2f4ee0861ae511c419148c8",      "serial": "---",      "count": 1    },    {      "name": "Bluesteel Egg of Genius",      "rap": 289,      "uaid": "16601902",      "link": "https://www.roblox.com/Bluesteel-Egg-of-Genius-item?id=1533893",      "img": "https://t7.rbxcdn.com/48bf59fe531dd1ff155e455367e52e73",      "serial": "---",      "count": 1    }  ]}}

Now I'm trying to get the following value from it:

"rap": 2098,

I just need 2098 and I've been trying the following code:

string rap = data["rap"].Value<string>();

But sadly this wouldn't work. Does anyone have a idea how to get the value?

Answer 1

I just came to add Yet another way to get 2098:

---

After having got your object in the way you actually did:

var data = (JObject)JsonConvert.DeserializeObject(json);

The first you have to note is that the value you want to get is itself a value of the property "meta":

so, first you have to extract the contents of "meta" by simply calling

data["meta"]

and just then you are able to ask for the Value<string> of "rap":

String rap = data["meta"].Value<string>("rap");

which acctually gives you the value you were looking for:

Console.WriteLine(rap); // 2098

Answer 2

Instead of declaring as type var and letting the compiler sort it, declare as a dynamic and using the Parse method.

dynamic data = JArray.Parse(json);

Then try

data.meta.rap

To get the internal rap object. I edited from using the deserializeobject method as i incorrectly thought that had the dynamic return type. See here on json.net documentation for more details: http://www.newtonsoft.com/json/help/html/QueryJsonDynamic.htm

Answer 3

var jobject = (JObject)JsonConvert.DeserializeObject(json);
var jvalue = (JValue)jobject["meta"]["rap"];
Console.WriteLine(jvalue.Value); // 2098

Answer 4

Try:

var result = data["meta"]["rap"].Value<int>();

or

var result = data.SelectToken("meta.rap").ToString();

or if you don't want to want to pass the whole path in, you could just search for the property like this:

var result = data.Descendants()
                 .OfType<JProperty>()
                 .FirstOrDefault(x => x.Name == "rap")
                 ?.Value;

Answer 5

The value is actually an int type. Try:

int rap = data["rap"].Value<int>();

Answer 6

string rap = JsonConvert.DeserializeObject<dynamic>(json).meta.rap;
Console.WriteLine(rap); // 2098

If you're not into dynamic (or aren't using .NET 4+), I like how this other answer relies solely on Json.NET's API.