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Get value from Json url with a changing variable

I want to get the price of any crypto coin from BitZ api.
I have the code like this:
string coinName;
string jsonURL = "https://apiv2.bitz.com/Market/coinRate?coins=" + coinName;
I will give the variable coinName the value I want for example coinName = "btc" and I want the price in USDT
The problem here is the Json structure it contains the coin name I will end up with tons of code lines if do this for every coin,
public class Btc
{
public string usdt { get; set; }
}
public class Data
{
public Btc btc { get; set; }
}
public class Root
{
public int status { get; set; }
public string msg { get; set; }
public Data data { get; set; }
public int time { get; set; }
public string microtime { get; set; }
public string source { get; set; }
}
Unlike Bittrex api for example which is easier to read using JsonDotNet asset from unity store and :
BittrexJsonUrl = "https://api.bittrex.com/api/v1.1/public/getticker?market=USDT-" + coinName;
and then I use this code to get the data:
private IEnumerator GetData()
{
/////bittrex
UnityWebRequest request = UnityWebRequest.Get(BittrexJsonUrl);
yield return request.SendWebRequest();
if (request.error == null)
{
Bittrex_proccessJsonData(request.downloadHandler.text);
}
else
{
Debug.Log("Something went wrong!!");
}
}
private void Bittrex_proccessJsonData (string _url) {
var _bittrexJsonData = JsonConvert.DeserializeObject<BittrexJsonData>(_url);
bittrexPrice = _bittrexJsonData.result.Last;
}
this works perfectly with with bittrex's Json structure, since it doesnt contain the coin name all I do is change the Json URL.
Now I want to do like the same thing for BitZ's if you have any idea how to please help :) thank you in advance.

For such thing you could use good old SimpleJson.
Here you don't need to implement the entire c# structure but rather access the data field by field via it's ID. You can imagine it like a nested Dictionary like thing.
Simply create that file with given content from the link somewhere in your project and do e.g.
var json = JSON.Parse(the_JSON_string);
var usdt = json["Data"]["bst"]["usdt"].AsFloat;

Json.Net Deserializing list of c# objects throwing error

I have a list of objects in below json format. I would like to deserialize using below code. It is throwing unable to convert to object error. I have tried below three options, but didnt help. jsoninput is a IEnumerable<string>converted into json object using ToJson().
Error:
{"Error converting value \"{\"id\":\"11ef2c75-9a6d-4cef-8163-94daad4f8397\",\"name\":\"bracing\",\"lastName\":\"male\",\"profilePictureUrl\":null,\"smallUrl\":null,\"thumbnailUrl\":null,\"country\":null,\"isInvalid\":false,\"userType\":0,\"profilePrivacy\":1,\"chatPrivacy\":1,\"callPrivacy\":0}\" to type 'Api.Models.UserInfo'. Path '[0]', line 1, position 271."}
var requests1 = JsonConvert.DeserializeObject<UsersInfo>(jsoninput);
var requests2 = JsonConvert.DeserializeObject<IEnumerable<UserInfo>>(jsoninput);
var requests3 = JsonConvert.DeserializeObject<List<UserInfo>>(jsoninput);
//Below are my classes,
public class UsersInfo
{
public List<UserInfo> UserInfoList { get; set; }
public UsersInfo()
{
UserInfoList = new List<UserInfo>();
}
}
public class UserInfo
{
public string Id { set; get; }
public string Name { set; get; }
public string LastName { set; get; }
public string ProfilePictureUrl { set; get; }
public string SmallUrl { set; get; }
public string ThumbnailUrl { get; set; }
public string Country { set; get; }
public bool IsInvalid { set; get; }
}
Below is my json object,
["{\"id\":\"11ef2c75-9a6d-4cef-8163-94daad4f8397\",\"name\":\"bracing\",\"lastName\":\"male\",\"profilePictureUrl\":null,\"smallUrl\":null,\"thumbnailUrl\":null,\"country\":null,\"isInvalid\":false}","{\"id\":\"318c0885-2720-472c-ba9e-1d1e120bcf65\",\"name\":\"locomotives\",\"lastName\":\"riddles\",\"profilePictureUrl\":null,\"smallUrl\":null,\"thumbnailUrl\":null,\"country\":null,\"isInvalid\":false}"]
Looping through individual items in json input and if i deserialize it like below, it works fine. But i want to deserialize the list fully. Note: jsoninput was a IEnumerable<string> before i convert in json object.
foreach (var re in jsoninput)
{
var request0 = JsonConvert.DeserializeObject<UserInfo>(re);
}

Please look at this fiddle: https://dotnetfiddle.net/XpjuL4
This is the code:
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
//Below are my classes,
public class UsersInfo
{
public List<UserInfo> UserInfoList { get; set; }
public UsersInfo()
{
UserInfoList = new List<UserInfo>();
}
}
public class UserInfo
{
public string Id { set; get; }
public string Name { set; get; }
public string LastName { set; get; }
public string ProfilePictureUrl { set; get; }
public string SmallUrl { set; get; }
public string ThumbnailUrl { get; set; }
public string Country { set; get; }
public bool IsInvalid { set; get; }
}
public class Program
{
public static void Main()
{
Console.WriteLine("Hello World");
Option1();
Option2();
}
public static void Option1(){
string json = #"{""UserInfoList"":[
{""id"":""11ef2c75 - 9a6d - 4cef - 8163 - 94daad4f8397"",""name"":""bracing"",""lastName"":""male"",""profilePictureUrl"":null,""smallUrl"":null,""thumbnailUrl"":null,""country"":null,""isInvalid"":false},
{ ""id"":""318c0885-2720-472c-ba9e-1d1e120bcf65"",""name"":""locomotives"",""lastName"":""riddles"",""profilePictureUrl"":null,""smallUrl"":null,""thumbnailUrl"":null,""country"":null,""isInvalid"":false}
]}";
var obj = JsonConvert.DeserializeObject<UsersInfo>(json);
obj.UserInfoList.ForEach(e => Console.WriteLine(e.Id));
}
public static void Option2(){
string json = #"[
{""id"":""11ef2c75 - 9a6d - 4cef - 8163 - 94daad4f8397"",""name"":""bracing"",""lastName"":""male"",""profilePictureUrl"":null,""smallUrl"":null,""thumbnailUrl"":null,""country"":null,""isInvalid"":false},
{ ""id"":""318c0885-2720-472c-ba9e-1d1e120bcf65"",""name"":""locomotives"",""lastName"":""riddles"",""profilePictureUrl"":null,""smallUrl"":null,""thumbnailUrl"":null,""country"":null,""isInvalid"":false}
]";
var obj = JsonConvert.DeserializeObject<List<UserInfo>>(json);
obj.ForEach(e => Console.WriteLine(e.Id));
}
}
Both work, and are basically very close to what you are doing. You can either serialize it as a list (based on your json, I think that's the closest to your use case, and that's Option 2).
However, put extra attention to the JSON. I had to re-parse your JSON to make it work (https://jsonformatter.org/json-parser is a nice website to do it). For the sake of explaining the example, in C#, # means raw string, and in raw string, quotes are escaped with double quotes "".
I would expect that the business logic generating this JSON is not correct, if the JSON you pasted is the direct result from it.
EDIT
Given the OP's comment:
Thanks Tu.ma for your thoughts. The other method returns
IEnumerable which is nothing but
Dictionary.Where(x => x.Value == null).Select(x =>
x.Key).ToHashSet(). The values in Dictionary are -> Key
is String, Value is UserInfo object serialized. So, in that case i
should deserialize one by one? If not, i should serialize entire list
in one shot? Am i right? – Raj 12 hours ago
The problem is in the way you are generating the list of UsersInfo. The result from Dictionary<string,string>.Where(x => x.Value == null).Select(x =>
x.Key).ToHashSet() is a bunch of strings, not of objects, so you need to serialize them one by one.
If you are worried about the linearity of the approach, you could consider running through it in parallel. Of course, you need to judge if it fits your application.
var userInfoStrings = Dictionary<string,string>.Where(x => x.Value == null).Select(x => x.Key).ToHashSet();
var UserInfoList = userInfoStrings.AsParallel().Select (u => JsonConvert.DeserializeObject<UsersInfo>(u)).ToList();

NEST Api SearchAfter return null in NEST but works in Kibana

We are using elastic search just for document search in our application so we don't have any one expert in it. I was able to use TermQuery, SimpleQueryStringQuery and MatchPhraseQuery successfully. But I found out in documentation that using From & Size for pagination is not good for production and Search After is recommended.
But my implementation return null. It is confusing for me what should be in <Project> parameter as shown in Nest API Object Initializer Syntax in docs here.
My code looks like this:
var request = new SearchRequest<ElasticSearchJsonObject._Source>
{
//Sort = new List<ISort>
//{
// new SortField { Field = Field<ElasticSearchJsonObject>(p=>)}
//},
SearchAfter = new List<object> {
},
Size = 20,
Query = query
};
Reality is I don't understand this. Over here ElasticSearchJsonObject._Source is the class to map returned results.
My documents are simple text documents and I only want documents sorted according to score so document Id is not relevant.
There was already a question like this on SO but I can't find it somehow.
Update
After looking at answer I updated my code and though query obtained does work. It return result in kibana but not in NEST.
This is the new updated code:
var request = new SearchRequest<ElasticSearchJsonObject.Rootobject>
{
Sort = new List<ISort>
{
new SortField { Field = "_id", Order = SortOrder.Descending}
},
SearchAfter = new List<object> {
"0fc3ccb625f5d95b973ce1462b9f7"
},
Size = 1,
Query = query
};
Over here I am using size=1 just for test as well as hard code _id value in SearchAfter.
The query generated by NEST is:
{
"size": 1,
"sort": [
{
"_id": {
"order": "desc"
}
}
],
"search_after": [
"0fc3ccb625f5d95b973ce1462b9f7"
],
"query": {
"match": {
"content": {
"query": "lahore",
"fuzziness": "AUTO",
"prefix_length": 3,
"max_expansions": 10
}
}
}
}
The response from the ES does say successful but no results are returned.
Results do return in Kibana
Query status is successful
But...
Total returned is 0 in NEST
Sort value is null in kibana I used TrackScores = true to solve this issue
Here is the debug information:
Valid NEST response built from a successful low level call on POST: /extract/_source/_search?typed_keys=true
# Audit trail of this API call:
- [1] HealthyResponse: Node: http://localhost:9200/ Took: 00:00:00.1002662
# Request:
{"size":1,"sort":[{"_id":{"order":"desc"}}],"search_after":["0fc3ccb625f5d95b973ce1462b9f7"],"query":{"match":{"content":{"query":"lahore","fuzziness":"AUTO","prefix_length":3,"max_expansions":10}}}}
# Response:
{"took":3,"timed_out":false,"_shards":{"total":5,"successful":5,"skipped":0,"failed":0},"hits":{"total":0,"max_score":null,"hits":[]}}
So please tell me where I am wrong and what can be the problem and how to solve it.
Update 2:
Code in Controller:
Connection String:
var node = new Uri("http://localhost:9200");
var settings = new ConnectionSettings(node);
settings.DisableDirectStreaming();
settings.DefaultIndex("extract");
var client = new ElasticClient(settings);
Query:
var query = (dynamic)null;
query = new MatchQuery
{
Field = "content",
Query = content,
Fuzziness = Fuzziness.Auto,
PrefixLength = 3,
MaxExpansions = 10
};
Query Builder
var request = new SearchRequest<ElasticSearchJsonObject.Rootobject>
{
Sort = new List<ISort>
{
new SortField { Field = "_id", Order = SortOrder.Descending}
},
SearchAfter = new List<object> {
documentid //sent as parameter
},
Size = 1, //for testing 1 other wise 10
TrackScores = true,
Query = query
};
JSON Query
I use this code to get query I posted above. This query is then passed to kibana with GET <my index name>/_Search and there it works
var stream = new System.IO.MemoryStream();
client.SourceSerializer.Serialize(request, stream);
var jsonQuery = System.Text.Encoding.UTF8.GetString(stream.ToArray());
ES Response
string responseJson = "";
ElasticSearchJsonObject.Rootobject response = new ElasticSearchJsonObject.Rootobject();
var res = client.Search<object>(request);
if (res.ApiCall.ResponseBodyInBytes != null)
{
responseJson = System.Text.Encoding.UTF8.GetString(res.ApiCall.ResponseBodyInBytes);
try
{
response = JsonConvert.DeserializeObject<ElasticSearchJsonObject.Rootobject>(responseJson);
}
catch (Exception)
{
var model1 = new LoginSignUpViewModel();
return PartialView("_NoResultPage", model1);
}
}
This is where things go wrong. Above debug information was captured from response
ElasticSearchJsonObject
Some how I think problem might be here somewhere? The class is generated by taking response from NEST in Search request.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace ESAPI
{
public class ElasticSearchJsonObject
{
public class Rootobject
{
public int took { get; set; }
public bool timed_out { get; set; }
public _Shards _shards { get; set; }
public Hits hits { get; set; }
}
public class _Shards
{
public int total { get; set; }
public int successful { get; set; }
public int skipped { get; set; }
public int failed { get; set; }
}
public class Hits
{
public int total { get; set; }
public float max_score { get; set; }
public Hit[] hits { get; set; }
}
public class Hit
{
public string _index { get; set; }
public string _type { get; set; }
public string _id { get; set; }
public float _score { get; set; }
public _Source _source { get; set; }
}
public class _Source
{
public string content { get; set; }
public Meta meta { get; set; }
public File file { get; set; }
public Path path { get; set; }
}
public class Meta
{
public string title { get; set; }
public Raw raw { get; set; }
}
public class Raw
{
public string XParsedBy { get; set; }
public string Originator { get; set; }
public string dctitle { get; set; }
public string ContentEncoding { get; set; }
public string ContentTypeHint { get; set; }
public string resourceName { get; set; }
public string ProgId { get; set; }
public string title { get; set; }
public string ContentType { get; set; }
public string Generator { get; set; }
}
public class File
{
public string extension { get; set; }
public string content_type { get; set; }
public DateTime last_modified { get; set; }
public DateTime indexing_date { get; set; }
public int filesize { get; set; }
public string filename { get; set; }
public string url { get; set; }
}
public class Path
{
public string root { get; set; }
public string _virtual { get; set; }
public string real { get; set; }
}
}
}
I am sure this can be used to get response.
Please note that in case of simple search this code works:
so for this query below my code is working:
var request = new SearchRequest
{
From = 0,
Size = 20,
Query = query
};

Using from/size is not recommended for deep pagination because of the amount of documents that need to be fetched from all shards for a deep page, only to be discarded when finally returning an overall ordered result set. This operation is inherent to the distributed nature of Elasticsearch, and is common to many distributed systems in relation to deep pagination.
With search_after, you can paginate forward through documents in a stateless fashion and it requires
the documents returned from the first search response are sorted (documents are sorted by _score by default)
passing the values for the sort fields of the last document in the hits from one search request as the values for "search_after": [] for the next request.
In the Search After Usage documentation, a search request is made with sort on NumberOfCommits descending, then by Name descending. The values to use for each of these sort fields are passed in SearchAfter(...) and are the values of Project.First.NumberOfCommits and Project.First.Name properties, respectively. This tells Elasticsearch to return documents that have values for the sort fields that correspond to the sort constraints for each field, and relate to the values supplied in the request. For example, sort descending on NumberOfCommits with a supplied value of 775 means that Elasticsearch should only consider documents with a value less than 775 (and to do this for all sort fields and supplied values).
If you ever need to dig further into any NEST documentation, click the "EDIT" link on the page:
which will take you to the github repository of the documentation, with the original asciidoc markdown for the page:
Within that page will be a link back to the original NEST source code from which the asciidoc was generated. In this case, the original file is SearchAfterUsageTests.cs in the 6.x branch

Deserialize JSON array of values in C#

I've got some difficulties with this json script:
{
"insured_agent_flag": "a",
"id": "1",
"agent": {
"fullName": "John Travolta",
"mobileNumberPdf": "+987654321",
"mobileNumber": "",
"identityCard": {
"identityCardExpirationDate": null
},
"secondIdentityCard": {
"identityCardExpirationDate": null
},
"notes": {},
"sign": "ADVANCED"
},
"basicData": {
"personType": "PERSON",
"agreeWithCompleteAnalysis": false,
"investmentInterest": false
},
"nonOfferedProducts": [
"PROD_A",
"PROD_B",
"PROD_C"
]
}
I would like to get some parameters from this script and put it into sql server table.
In order to do that, I used and transformed a C# script shared by https://mycontraption.com:
using System;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;
using System.Web.Script.Serialization;
using Microsoft.SqlServer.Dts.Pipeline;
namespace SC_c7e2d8c3918d46a5a07a1b438ddc7642
{
public class BasicData
{
public string agreeWithCompleteAnalysis { get; set; }
public string inOtherSystem { get; set; }
public string investmentInterest { get; set; }
}
public class ParentObject
{
public BasicData BasicData { get; set; }
public int id { get; set; }
public string insured_agent_flag { get; set; }
public IEnumerable<string> NonOfferedProducts { get; set; }
}
[Microsoft.SqlServer.Dts.Pipeline.SSISScriptComponentEntryPointAttribute]
public class ScriptMain : UserComponent
{
public override void Input0_ProcessInputRow(Input0Buffer Row)
{
JavaScriptSerializer js = new JavaScriptSerializer();
// Give the input column a variable to make it easier to reference.
BlobColumn combinedColumn = Row.parameterscon;
// Convert from blob to string
string reviewConverted = System.Text.Encoding.ASCII.GetString(combinedColumn.GetBlobData(0, Convert.ToInt32(combinedColumn.Length)));
// Deserialize the string
ParentObject obj = js.Deserialize<ParentObject>(reviewConverted);
var rows = obj.NonOfferedProducts.ToList();
Row.agreeWithCompleteAnalysis = obj.BasicData.agreeWithCompleteAnalysis;
Row.inOtherSystem = obj.BasicData.inOtherSystem;
Row.investmentInterest = obj.BasicData.investmentInterest;
Row.projectionid = obj.id;
Row.insuredagentflag = obj.insured_agent_flag;
//Row.nonOfferedProducts =
}
}
}
For 'standard' objects it works fine, but there is a problem with array "nonOfferedProducts". After compiling I get an error:
„object reference not set to an instance of an object”.
Here are my questions:
1. How should I handle 'nonOfferedProducts' array in C# script?
2. Why do I get foregoing error?
3. Unfortunately there exists a possibility, that json scripts would have some errors, like missing braces. How should I handle that?
Thank you!
Thanks a lot for your answers. According to your comments I'll try to give you more explanations:
1. The json script I have added in this post - it's only small part of whole script. In complete script there is a lot of different parameters. What is more, my C# code should scan about 40.000 json scripts (stored in sql server table in one column). These scripts has got similiar structure - but not the same.
So I thought about C# resolution, that will be searching for the parameters that I need. For json scripts without these parameters the c# code will put nulls to the right output columns.
Here are my output columns:
-agreeWithCompleteAnalysis
-inOtherSystem
-investmentInterest
-projectionId
-insuredAgentFflag
-nonOfferedProducts
I understood, that structure of my classes were wrong - I'll improve that.
But I've got one doubt - is it possible to prepare c# code structure, that will handle only these parameters I need?
And finally, I would like to put the results into my database.
For example if nonOfferedProducts property will have 3 values (not always!), I'd like to send to my database table 3 records (3 different values for nonOfferedProducts column and 3 the same values for the rest columns -agreeWithCompleteAnalysis, inOtherSystem etc).
I hope that will be clear now.
Thanks a lot for your help!
J

Use https://quicktype.io and paste json, it will generate c# model and serializer code.

As I said in my comment, your c# model doesn't match the JSON object.
If the model was made up of various nested objects to better reflect the actual JSON then you'll have more luck:
public class IdentityCard
{
public DateTime? IdentityCardExpirationDate { get; set; }
}
public class Notes
{
//No idea what should be in here...
}
public class BasicData
{
public string PersonType { get; set; }
public bool AgreeWithCompleteAnalysis { get; set; }
public bool InvestmentInterest { get; set; }
}
public class Agent
{
public string FullName { get; set; }
public string MobileNumberPdf { get; set; }
public string MobileNumber { get; set; }
public IdentityCard IdentityCard { get; set; }
public IdentityCard SecondIdentityCard { get; set; }
public Notes Notes { get; set; }
public string Sign { get; set; }
}
//Note: THIS is the actual class that matches the JSON sample given.
public class ParentObject
{
public string insured_agent_flag { get; set; }
public int Id { get; set; }
public Agent Agent { get; set; }
public BasicData BasicData { get; set; }
public IEnumerable<string> NonOfferedProducts { get; set; }
}
Once the model is correct, then Deserialization works fine for me with the given example (I did this in a unit test, but assuming your string matches your example this should be fine)
//get json
string json = #"
{
""insured_agent_flag"": ""a"",
""id"": ""1"",
""agent"": {
""fullName"": ""John Travolta"",
""mobileNumberPdf"": ""+987654321"",
""mobileNumber"": """",
""identityCard"": {
""identityCardExpirationDate"": null
},
""secondIdentityCard"": {
""identityCardExpirationDate"": null
},
""notes"": {},
""sign"": ""ADVANCED""
},
""basicData"": {
""personType"": ""PERSON"",
""agreeWithCompleteAnalysis"": false,
""investmentInterest"": false
},
""nonOfferedProducts"": [
""PROD_A"",
""PROD_B"",
""PROD_C""
]
}";
var js = new JavaScriptSerializer();
ParentObject obj = js.Deserialize<ParentObject>(json);
//do things...
var rows = obj.NonOfferedProducts.ToList();
Assert.AreEqual(3, rows.Count);
Assert.AreEqual("PROD_A", rows.First());
The asserts pass - This code happily gets the list of strings in the NonOfferedProducts property with the given example.
Obviously if you cannot rely on the consistency of the JSON (either structure or how well-formed it is) then you'll have problems, but that's a different issue.

To answer your question no 2) you are getting the object reference error because the BasicDataClass.nonOfferedProducts is null and you are trying iterate over it , this may be a reason that you are sending the wrong json which JavaScriptSerializer is not able to deserilize.
your 3rd question you can always validate your json with json validators which are there online like https://jsonformatter.org/

Deserialize JSON string into a list for dropdownlist in C#

I have a windows form application and would like to deserialize a JSON string that I'm getting from a web address so that I can get just two values from it, how would I go about doing this?
Below is the code I have to get the JSON string, and if you go to the URL that it's getting, you can also see the JSON string. I want to just get the item name, and current price of it. Which you can see the price under the current key.
private void GrabPrices()
{
using (WebClient webClient = new System.Net.WebClient())
{
WebClient n = new WebClient();
var json = n.DownloadString("http://services.runescape.com/m=itemdb_rs/api/catalogue/detail.json?item=1513");
string valueOriginal = Convert.ToString(json);
Console.WriteLine(json);
}
}
It's also going to be iterating through a SQLite database and getting the same data for multiple items based on the item ID, which I'll be able to do myself.
EDIT I'd like to use JSON.Net if possible, I've been trying to use it and it seems easy enough, but I'm still having trouble.

Okay so first of all you need to know your JSON structure, sample:
[{
name: "Micheal",
age: 20
},
{
name: "Bob",
age: 24
}]
With this information you can derive a C# object
public class Person
{
public string Name {get;set;}
public int Age {get;set;}
}
Now you can use JSON.NET to deserialize your JSON into C#:
var people = JsonConvert.DeserializeObject<List<Person>>(jsonString);
If you look at the original JSON it is an array of objects, to deal with this I have used List<T>.
Key things to remember, you need to have the C# object mirror in properties that of the JSON object. If you don't have a list, then you don't need List<T>.
If your JSON objects have camel casing, and you want this converted to the C# conventions, then use this:
var people = JsonConvert.DeserializeObject<List<Person>>(
jsonString,
new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() });

First of all you need to create a class structure for the JSON
public class Wrapper
{
public Item item;
}
public class Item
{
public string icon { get; set; }
public string icon_large { get; set; }
public int id { get; set; }
public string type { get; set; }
public string typeIcon { get; set; }
public string name { get; set; }
public string description { get; set; }
public GrandExchange current { get; set; }
public GrandExchange today { get; set; }
public bool members { get; set; }
public GrandExchange day30 { get; set; }
public GrandExchange day90 { get; set; }
public GrandExchange day180 { get; set; }
}
public class GrandExchange
{
public string trend { get; set; }
public string price { get; set; }
}
Then you need to serialize the current item into a Wrapper class
var wrapper = JsonConvert.DeserializeObject<Wrapper>(json);
Then if you want multiple items in a list, you can do so with this code :
// Items to find
int[] itemIds = {1513, 1514, 1515, 1516, 1517};
// Create blank list
List<Item> items = new List<Item>();
foreach (int id in itemIds)
{
var n = new WebClient();
// Get JSON
var json = n.DownloadString(String.Format("http://services.runescape.com/m=itemdb_rs/api/catalogue/detail.json?item={0}", id));
// Parse to Item object
var wrapper = JsonConvert.DeserializeObject<Wrapper>(json);
// Append to list
items.Add(wrapper.item);
}
// Do something with list
It is also worth noting that Jagex limit how many times this API can be called from a certain IP within a time frame, going over that limit will block your IP for a certain amount of time. (Will try and find a reference for this)