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Convert Rest API JSON Response into C# object

I have a code REST API response which is json, and parsing to JObject and pulling a value from it. But i am getting the error when parsing to JObject.
Error: "Unexpected character encountered while parsing value: S. Path '', line 0, position 0."
Is there any other way to convert Json string to C# object.
I have the following code:
using Newtonsoft.Json;
using (HttpResponseMessage message = httpclient.GetAsync(folderIdURL).Result)
{
if(message.IsSuccessStatusCode)
{
var dataobjects = message.Content.ReadAsStringAsync();
//dataobjects = "{"id":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/","title":"DQL query results","author":[{"name":"EMC Documentum"}],"updated":"2019-05-02T15:19:52.508+00:00","page":1,"items-per-page":100,"links":[{"rel":"self","href":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/?dql=SELECT%20r_object_id%2cobject_name%20FROM%20dm_sysobject%20WHERE%20FOLDER%20(%27%2fgbc%2fUS%2fOSA-ATTACHMENT%2f2019%27)"}],"entries":[{"id":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/?dql=SELECT%20r_object_id%2cobject_name%20FROM%20dm_sysobject%20WHERE%20FOLDER%20(%27%2fgbc%2fUS%2fOSA-ATTACHMENT%2f2019%27)&index=0","title":"0b0111738011c114","updated":"2019-05-02T15:19:52.508+00:00","published":"2019-05-02T15:19:52.508+00:00","links":[{"rel":"edit","href":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/objects/0b0111738011c114"}],"content":{"json-root":"query-result","definition":"https://gbc-dev5.cloud.wc.com/DctmRest/repositori es/dmgbsap_crt/types/dm_sysobject","properties":{"r_object_id":"0b0111738011c114","object_name":"04"},"links":[{"rel":"self","href":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/objects/0b0111738011c114"}]}},{"id":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/?dql=SELECT%20r_object_id%2cobject_name%20FROM%20dm_sysobject%20WHERE%20FOLDER%20(%27%2fgbc%2fUS%2fOSA-ATTACHMENT%2f2019%27)&index=1","title":"0b0111738011c115","updated":"2019-05-02T15:19:52.509+00:00","published":"2019-05-02T15:19:52.509+00:00","links":[{"rel":"edit","href":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/objects/0b0111738011c115"}],"content":{"json-root":"query-result","definition":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/types/dm_sysobject","properties":{"r_object_id":"0b0111738011c115","object_name":"05"},"links":[{"rel":"self","href":"https://gbc-dev5.cloud.wc.com/DctmRest/repositories/dmgbsap_crt/objects/0b0111738011c115"}]}}]}"
JObject responseObj = JObject.Parse(dataobjects.ToString());
String id = (String)responseObj["entries" -->"content"-->"properties"-->"object_name"];
}
}
}
I am expecting the value from (String)responseObject["enteries"]["content"][" properties"]["object_name"]

JObjects are a pain. You could get a sample of the JSON response and paste it into a converter like json2csharp.com. It will generate a class for you which you can then use like so:
Generated Class:
public class MyClass
{
public string SomeProperty { get; set; }
public string AnotherProperty { get; set; }
}
Usage:
if (message.IsSuccessStatusCode)
{
var deserializedObject = JsonConvert.DeserializeObject<MyClass>(response.Content.ReadAsStringAsync().Result);
Console.WriteLine(deserializedObject.SomeProperty);
}

I would suggest to follow those steps:
You need to check that your json is actually a json, because an error says it is not. You can use online tools like this
If possible, avoid JObject and generate real classes. It is not that hard if you know the structure, and you can use another online tools
Modify your code to use classes
so you will have something like:
using System;
using Newtonsoft.Json;
namespace ConsoleApp11
{
class Program
{
public class Message
{
public Enteries enteries { get; set; }
}
public class Enteries
{
public Content content { get; set; }
}
public class Content
{
public Properties properties { get; set; }
}
public class Properties
{
public string object_name { get; set; }
}
static void Main(string[] args)
{
var input = "{\"enteries\":{\"content\":{ \"properties\":{ \"object_name\":\"your value string\"}}}}";
Message msg = JsonConvert.DeserializeObject<Message>(input);
Console.WriteLine(msg?.enteries?.content?.properties?.object_name ?? "no value");
Console.ReadKey();
}
}
}
I hope it helps 😊

Thank you so much for all the help and trips. Finally i am able to get the required value from JSON string.
Here is the Final code json2csharp.com
public class Author
{
public string name { get; set; }
}
public class Link
{
public string rel { get; set; }
public string href { get; set; }
}
public class Link2
{
public string rel { get; set; }
public string href { get; set; }
}
public class Properties
{
public string r_object_id { get; set; }
public string object_name { get; set; }
}
public class Link3
{
public string rel { get; set; }
public string href { get; set; }
}
public class Content
{
public string json_root { get; set; }
public string definition { get; set; }
public Properties properties { get; set; }
public List<Link3> links { get; set; }
}
public class Entry
{
public string id { get; set; }
public string title { get; set; }
public DateTime updated { get; set; }
public DateTime published { get; set; }
public List<Link2> links { get; set; }
public Content content { get; set; }
}
public class RootObject
{
public string id { get; set; }
public string title { get; set; }
public List<Author> author { get; set; }
public DateTime updated { get; set; }
public int page { get; set; }
public int items_per_page { get; set; }
public List<Link> links { get; set; }
public List<Entry> entries { get; set; }
}

Using Newtonsoft.Json
First get the list of entries from the responseObj. Then loop each entries and use LINQ to JSON to get values by property name or index.
You can use Item[Object] index on JObject/JArray and then cast the returned JValue to the type you want
JObject responseObj = JObject.Parse(dataobjects.ToString());
// get JSON result objects into a list
IList<JToken> entries = responseObj ["entries"].Children().ToList();
foreach(JToken entry in entries)
{
string object_name = (string) entry["content"]["properties"]["object_name"];
}

Deserialise a Kraken JSON in C#

I used to be loading data from Cryptocompare's API.
This post got me what I wanted for Cryptocompare.
Parsing Cryptocompare API Json data in C#
However, I notice that this API is not bulletproof, it's not always returning an answer. So I want to use Kraken itself.
Now I am trying to deserialise the new JSON but this is not straightforward as Cryptocompare's JSON.
Here is an example JSON:
https://api.kraken.com/0/public/OHLC?pair=ETHUSD&interval=30
{"error":[],"result":{"XETHZUSD":[[1519236000,"825.94","846.00","825.94","845.00","835.62","858.29381033",708],[1519237800,"846.00","848.84","835.55","836.00","844.31","647.42747317",731],[1519239600,"836.00","841.09","830.76","834.89","835.13","1051.44905097",609],[1520530200,"706.24","710.43","701.90","704.59","707.70","1763.41692283",459]],"last":1520528400}}
I have not been able to deserialise this JSON.
Solved!!!
final solution:
var Results_Exchange_Kraken = JsonConvert.DeserializeObject<DataRoot_Kraken>(Content_Exchange_Kraken);
var price_data_kraken = Results_Exchange_Kraken.result.XETHZUSD;
public class Kraken_Result
{
public List<List<object>> XETHZUSD { get; set; }
public int last { get; set; }
}
public class DataRoot_Kraken
{
public List<object> error { get; set; }
public Kraken_Result result { get; set; }
}
Thank you! I'll bookmark the URL.

Use this Model to de-serialise your data
public class Result
{
public List<List<object>> XETHZUSD { get; set; }
public int last { get; set; }
}
public class RootObject
{
public List<object> error { get; set; }
public Result result { get; set; }
}
Model Generated by Model Generator
Then use NewtonSoft for c# to de-serialise your data
E.g.
RootObject tmp = JsonConvert.DeserializeObject<RootObject>("JSON String here");
final solution:
var Results_Exchange_Kraken = JsonConvert.DeserializeObject<DataRoot_Kraken>(Content_Exchange_Kraken);
var price_data_kraken = Results_Exchange_Kraken.result.XETHZUSD;
public class Kraken_Result
{
public List<List<object>> XETHZUSD { get; set; }
public int last { get; set; }
}
public class DataRoot_Kraken
{
public List<object> error { get; set; }
public Kraken_Result result { get; set; }
}

Unable to deserialize JSON in c#

I am getting the below JSON in response from a REST API.
{
"data":{
"id":123,
"zoneid":"mydomain.com",
"parent_id":null,
"name":"jaz",
"content":"172.1 6.15.235",
"ttl":60,
"priority":null,
"type":"A",
"regions":[
"global"
],
"system_record":false,
"created_at":"2017-09-28T12:12:17Z",
"updated_at":"2017-09-28T12:12:17Z"
}
}
and trying to resolve using below code but that doesn't result in a correctly deserialized type.
var model = JsonConvert.DeserializeObject<ResponseModel>(response);
below is a class according the field I received in JSON response.
public class ResponseModel
{
public int id { get; set; }
public string zone_id { get; set; }
public int parent_id { get; set; }
public string name { get; set; }
public string content { get; set; }
public int ttl { get; set; }
public int priority { get; set; }
public string type { get; set; }
public string[] regions { get; set; }
public bool system_record { get; set; }
public DateTime created_at { get; set; }
public DateTime updated_at { get; set; }
}
What is missing?

You're missing a wrapper class.
public class Wrapper
{
public ResponseModel data {get;set}
}
and then do:
var model = JsonConvert.DeserializeObject<Wrapper>(response).data;
to get the instance of your ResponseModel out the data property.
You can deduct this from your json:
{ "data":
{ "id":123, /*rest omitted */ }
}
The type that will receive this JSON needs to have a property named data. The suggested Wrapper class acts as that type.

According to json2csharp website, your model seems to be incorrect. Try this one :
public class ResponseModel
{
public int id { get; set; }
public string zoneid { get; set; }
public object parent_id { get; set; }
public string name { get; set; }
public string content { get; set; }
public int ttl { get; set; }
public object priority { get; set; }
public string type { get; set; }
public List<string> regions { get; set; }
public bool system_record { get; set; }
public DateTime created_at { get; set; }
public DateTime updated_at { get; set; }
}
public class RootObject
{
public ResponseModel data { get; set; }
}

Here a cool trick you can do in Visual Studio 2015-2017 where it generates the the correct class if you just copy the JSON (ctrl + c).
You need to create a new class in visual studio and once inside the class go to Edit menu -> Paste special -> paste JSON As Classes.
Steps to generate json class
This will generate the C# object for that json for you and save you all the hassle :)

Your model does not match your response - it matches the data property. Simply wrap another object round it
public class ResponseData
{
public ResponseModel Data {get; set; {
}
and then
var model = JsonConvert.DeserializeObject<ResponseData>(response);

Error while deserializing the JSON

I'm getting the JSON output as follows:
{"data":
[
{
"name":"followersQuery",
"fql_result_set":[{"subscriber_count":300}]
},
{
"name":"likesQuery",
"fql_result_set":[{"like_count":0}]
}
]
}
It is the output of multiple fql query.
I have created the following classes to deserialize the output:
public class ResultCount
{
[JsonProperty("subscriber_count")]
public int Followers { get; set; }
[JsonProperty("like_count")]
public int Likes { get; set; }
}
public class ResultItem
{
[JsonProperty("name")]
public string Name { get; set; }
[JsonProperty("fql_result_set")]
public ResultCount ResultCounts { get; set; }
}
public class FacebookData
{
public List<ResultItem> Items { get; set; }
}
I'm getting error while de-serializing the output in the following line:
JsonConvert.DeserializeObject<FacebookData>(myOutput);
The error is:
The best overloaded method match for
'Newtonsoft.Json.JsonConvert.DeserializeObject(string)'
has some invalid arguments.
Not able to correct this. Can anyone please correct this?
Many many thanks in advance!

ResultCounts return type should be List<Resultcount>.
Change
public ResultCount ResultCounts { get; set; }
to
public List<ResultCount> ResultCounts { get; set; }
On a sidenote you can get class structue by simply pasting your json here - Json2csharp. It will automatically generate class structure for you. It can be use to validate your structure. Generated structure was like this:
public class FqlResultSet
{
public int subscriber_count { get; set; }
public int? like_count { get; set; }
}
public class Datum
{
public string name { get; set; }
public List<FqlResultSet> fql_result_set { get; set; }
}
public class RootObject
{
public List<Datum> data { get; set; }
}

Using C# and Json.Net for parsing

An API is returning to me the following json:
{
"query":{
"pages":{
"49123":{
"pageid":49123,
"ns":0,
"title":"Phoenix (constellation)",
"revisions":[
{
"revid":588710862,
"parentid":588710834
}
]
}
}
}
}
I used json2csharp to build a class representing this json (I manually tweaked the names for PageInfo, as it was coughing on this name and calling it __invalid_type__49123)
public class Revision
{
public int revid { get; set; }
public int parentid { get; set; }
}
public class PageInfo
{
public int pageid { get; set; }
public int ns { get; set; }
public string title { get; set; }
public List<Revision> revisions { get; set; }
}
public class Pages
{
public PageInfo pageInfo { get; set; }
}
public class Query
{
public Pages pages { get; set; }
}
public class RootObject
{
public Query query { get; set; }
}
and tried to parse it:
var json = "{\"query\":{\"pages\":{\"49123\":{\"pageid\":49123,\"ns\":0,\"title\":\"Phoenix (constellation)\",\"revisions\":[{\"revid\":588710862,\"parentid\":588710834}]}}}}";
// unescaped version of json below
// {"query":{"pages":{"49123":{"pageid":49123,"ns":0,"title":"Phoenix (constellation)","revisions":[{"revid":588710862,"parentid":588710834}]}}}}
var root = JsonConvert.DeserializeObject<RootObject>(json);
I can examine and see root.query.pages all have values, but pageInfo is null. I'm not sure what I'm missing that will allow me to load this json into an object.

Change your class definiton as below. it will work.. (see the definition of Query class)
public class Revision
{
public int revid { get; set; }
public int parentid { get; set; }
}
public class Page
{
public int pageid { get; set; }
public int ns { get; set; }
public string title { get; set; }
public List<Revision> revisions { get; set; }
}
public class Query
{
public Dictionary<string,Page> pages { get; set; }
}
public class RootObject
{
public Query query { get; set; }
}