Develop Reference

Deserealizing JSON object using Newtonsoft.Json

I have API endpoint, that returning my JSON Object
Here is it
{
"results": [
{
"id": 182,
"title": "1-Day Private Beijing Tour to Tian'anmen Square, Forbidden City and Badaling Great Wall",
"price": "162",
"duration": "8",
"duration_type": "1",
"cover_image": {
"id": 308,
"img_path": "upload/images",
"img_file": "6d637884086151b30fe12db52fbaf5eb.jpg",
"status": "",
"created_at": "2018-02-27 02:25:36",
"updated_at": "2018-02-27 02:25:36",
"destination_id": "182",
"is_cover": "0",
"url": "https://api.xplorpal.com/upload/images/300x300/6d637884086151b30fe12db52fbaf5eb.jpg"
}
},
{
"id": 183,
"title": "One Day Private Beijing Tour to Mutianyu Great Wall and Summer Palace ",
"price": "197",
"duration": "8",
"duration_type": "1",
"cover_image": {
"id": 305,
"img_path": "upload/images",
"img_file": "1f8a09ddffb80ef9232f3511893ae5c4.jpg",
"status": "",
"created_at": "2018-02-27 02:22:19",
"updated_at": "2018-03-01 23:01:55",
"destination_id": "183",
"is_cover": "0",
"url": "https://api.xplorpal.com/upload/images/300x300/1f8a09ddffb80ef9232f3511893ae5c4.jpg"
}
}
]
}
I need to deserialize it
So I wrote this model
public class CoverImage
{
public int id { get; set; }
public string img_path { get; set; }
public string img_file { get; set; }
public string status { get; set; }
public string created_at { get; set; }
public string updated_at { get; set; }
public string destination_id { get; set; }
public string is_cover { get; set; }
public string url { get; set; }
}
public class Result
{
public int id { get; set; }
public string title { get; set; }
public string price { get; set; }
public string duration { get; set; }
public string duration_type { get; set; }
public CoverImage cover_image { get; set; }
}
public class RootObject
{
public List<Result> results { get; set; }
}
And trying to this like this
var responseExperiences = JsonConvert.DeserializeObject<IEnumerable<RootObject>>(content);
But when I run the project, I have this error:
Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.IEnumerable`1[TravelApp.Models.GettingExperiences+Results]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
How I can fix this?

your JSON shows one object result corresponding to RootObject.
But you are trying to deserialize an array (IEnumerable<>) of RootObject
You should use this to deserialiaze the JSON showed :
JsonConvert.DeserializeObject<RootObject>(content);

Your API returns an object with a single property named result, not a collection. You should deserialize into a RootObject object.

Your api return single object named result not a collection you simply need to desearilize as a single object like.
var responseExperiences = JsonConvert.DeserializeObject<RootObject>(content);

Array randomly parsed as null, and I have no idea why [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Closed 5 years ago.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Improve this question
So here's the JSON file I'm trying to parse usin JSON.Net
{
"SystemsInGal": [
{
"Name": "HIP 16607",
"xPos": 0,
"yPos": 0,
"StationsInSys": [
{
"Name": "Thome Gateway",
"SystemName": "HIP 16607",
"DistanceFromStar": 2573,
"PricePerFuel": 10
}
]
},
{
"Name": "Frenis",
"xPos": 10,
"yPos": 10,
"StationsInSys": [
{
"Name": "Parsons City",
"SystemName": "Frenis",
"DistanceFromStar": 32,
"PricePerFuel": 20
}
]
}
]
}
My problem is here
"StationsInSys": [
{
"Name": "Parsons City",
"SystemName": "Frenis",
"DistanceFromStar": 32,
"PricePerFuel": 20
}
]
When parsed by JSON.NET, it simply gives this array the value of null, which certainly isn't what I'm after. The first StationsInSys array is parsed correctly, however the second one isn't. People have checked, and said they couldn't find any differences I haven't corrected. JSONlint claims this file is valid JSON. My only other guess is that there is a problem with JSON.NEt itself, but I would assume this isn't the case
EDIT: Here's how I have my classes setup
public class Galaxy
{
public SolarSystem[] SystemsInGal { get; set; }
public Player player { get; set; }
}
public class Station
{
public string Name { get; set; }
public string SystemName { get; set; }
public int DistanceFromStar { get; set; }
public int PricePerFuel { get; set; }
//TODO Add trade data here
}
public class SolarSystem
{
public string Name { get; set; }
public int xPos { get; set; }
public int yPos { get; set; }
public Station[] StationsInSys { get; set; }
}
Galaxy gal = JsonConvert.DeserializeObject<Galaxy>(jsonText);
I hope that helps

I tried using Visual Studio 2017's Edit | Paste Special | Paste JSON as classes feature to create classes for this. That appeared to work. (I didn't bother to correct the casing of the generated class names.)
Here's the resulting code - how does it differ from yours?
using System;
using Newtonsoft.Json;
namespace Demo
{
public class Rootobject
{
public Systemsingal[] SystemsInGal { get; set; }
}
public class Systemsingal
{
public string Name { get; set; }
public int xPos { get; set; }
public int yPos { get; set; }
public Stationsinsy[] StationsInSys { get; set; }
}
public class Stationsinsy
{
public string Name { get; set; }
public string SystemName { get; set; }
public int DistanceFromStar { get; set; }
public int PricePerFuel { get; set; }
}
class Program
{
static void Main()
{
string data =
#"{
""SystemsInGal"": [
{
""Name"": ""HIP 16607"",
""xPos"": 0,
""yPos"": 0,
""StationsInSys"": [
{
""Name"": ""Thome Gateway"",
""SystemName"": ""HIP 16607"",
""DistanceFromStar"": 2573,
""PricePerFuel"": 10
}
]
},
{
""Name"": ""Frenis"",
""xPos"": 10,
""yPos"": 10,
""StationsInSys"": [
{
""Name"": ""Parsons City"",
""SystemName"": ""Frenis"",
""DistanceFromStar"": 32,
""PricePerFuel"": 20
}
]
}
]
}";
var result = JsonConvert.DeserializeObject<Rootobject>(data);
Console.WriteLine(result.SystemsInGal.Length);
}
}
}

Strange Json deserialize [duplicate]

This question already has answers here:
How can I deserialize a child object with dynamic (numeric) key names?
(2 answers)
Closed 2 years ago.
I try to make a connection with RouteXL but in the api response i get a json who is maybe invalid.
From the tag route he send a sort of array starting with a string index. Normally i convert this to a class (http://json2csharp.com) but with this json i get a invalid class structure because of the string index.
Before i go to split it by myself. You guys have a better solution?
With regards,
SirNirido
json:
{
"id": "6VTa8zH8",
"count":5,
"feasible":true,
"route": {
"0": { "name": "StartLocatie", "arrival":0, "distance":0},
"1": { "name": "58", "arrival":28, "distance":47.7},
"2": { "name": "57", "arrival":42, "distance":65.3},
"3": { "name": "56", "arrival":47, "distance":68.5},
"4": { "name": "StartLocatie", "arrival":61, "distance":87.1}}}

Thanks #JonSkeet it works like a charm.
It's a hard one for google. But if anyone ever have the sameproblem here is my new class schema
class Results
{
public string id { get; set; }
public int count { get; set; }
public bool feasible { get; set; }
public Dictionary<string, RouteResult> route { get; set; }
}
public class RouteResult
{
public string index { get; set; }
public string name { get; set; }
public int arrival { get; set; }
public double distance { get; set; }
}

JSON won't deserialise fully to C# class [duplicate]

This question already has answers here:
Json.net failing to load certain properties belonging to a class object?
(2 answers)
Closed 4 years ago.
I am trying to deserialise some JSON which looks like this:
{
"Results":{
"Prediction":{
"type":"table",
"value":{
"ColumnNames":[
"HT",
"AT",
"X",
"Y",
"Z"
],
"ColumnTypes":[
"String",
"String",
"Double",
"Double",
"Double"
],
"Values":[
[
"Mum",
"Dad",
"0.172627246490883",
"0.171741768332677",
"0.65563098517644"
],
[
"Father",
"Mother",
"0.391368227731864",
"0.21270005247278",
"0.395931719795356"
]
]
]
}
}
}
}
The C# class looks like this:
public class RootObject
{
public Results Results { get; set; }
}
public class Results
{
public Prediction Prediction { get; set; }
}
public class Prediction
{
public string type { get; set; }
public Value value { get; set; }
}
public class Value
{
string[] ColumnNames { get; set; }
string[] ColumnTypes { get; set; }
string[][] Values { get; set; }
}
It deserialises up to the final property "value", which is not matched. If I turn on the error handling to see why I get the following error:
Additional information: Could not find member 'ColumnNames' on object of type 'Value'. Path 'Results.Prediction.value.ColumnNames', line 1, position 64.
I have a simple C# example which reproduces the whole problem:
var derek = #"{""Results"":{""Prediction"":{""type"":""table"",""value"":{""ColumnNames"":[""HT"",""AT"",""X"",""Y"",""Z""],""ColumnTypes"":[""String"",""String"",""Double"",""Double"",""Double""],""Values"":[[""Mum"",""Dad"",""0.172627246490883"",""0.171741768332677"",""0.65563098517644""],[""Father"",""Mother"",""0.391368227731864"",""0.21270005247278"",""0.395931719795356""]]]}}}}";
var returnedObj = JsonConvert.DeserializeObject <RootObject> (derek, settings);
I am pretty sure my class matches the JSON. Why doesn't it deserialise?

In C# properties default to private, they need to be public to be picked up by Newtonsoft/Json
public class Value
{
public string[] ColumnNames { get; set; }
public string[] ColumnTypes { get; set; }
public string[][] Values { get; set; }
}

Deserailize JSON string [closed]

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
I have JSON in this format:
{
"user": "123#abc",
"filter": [
{
"filterName": "Filter1",
"condition": "1",
"values": [
"123"
]
},
{
"filterName": "Filter2",
"condition": "2",
"values": [
"ABC",
"XYZ"
]
}
],
"onlyMerge": "true",
"mergeBy": [
]
}
And I am using these classes
public class Outermost{
public string user;
public Root filter ;
public string onlyMerge;
public string mergeby;
}
public class values {
public string value { get; set; }
}
public class Filters {
public string filtername {get; set; }
public string condition {get; set;}
public values values { get; set; }
}
public class Root {
public List<Filters> Filters { get; set; }
}
JSONConvert.Deserialize(Outermost)
I have to deserialize the structure

Paste your JSON into http://json2csharp.com/ and you will see that your C# classes don't match the JSON.

Update 2:
Visual Studio 2013 has a built-in Json to C# Class converter tool!  :)
Update:
Just a note about the great tool http://json2csharp.com/ : When working with a object that has properties of complex types, You may want to check about the classes it creates, because sometimes it'll created unnecessarily/undesirable classes. Example:
Json
var objJson = {
"id_product": 19,
"description": "Laptop",
"_links": {
"buy": {
"href": "/Product/Buy/19",
"title": "Buy It Now!"
},
"more_details": {
"href": "/Product/Details/19",
"title": "More Details..."
}
}
};
Generated Class/Classes:
public class Buy
{
public string href { get; set; }
public string title { get; set; }
}
public class MoreDetails
{
public string href { get; set; }
public string title { get; set; }
}
public class Links
{
public Buy buy { get; set; }
public MoreDetails more_details { get; set; }
}
public class RootObject
{
public int id_product { get; set; }
public string description { get; set; }
public Links _links { get; set; }
}
As You can see, the two classes Buy and MoreDetails have exactly the same structure and purpose, so You may want to replace it with a more generic class instead of using repeatedly classes (there are scenarios where this redundant structure is more appropriate). In a very similar scenario, I've created a class named Link.
Original Answer:
You don't said enough to be sure what's your problem. Try in the future specify better what are your difficulties and needs.
But, I guess your problem is some exception being throw or some properties not being bind...
If you pay attention, in your JSON example object, filter is directly a collection, and not a property that has a collection inside. Thus, just change
public Root filter; to public List<Filters> filter { get; set; }.
Also, mergeBy and values are collections, and not simple strings. You could use http://json2csharp.com/ to generate automatically the correspondent C# class of your JSON object, and check what properties are not matching... (Or, substitute your whole class, that is what I would recommend...)