Questions tagged [json.net]
Json.NET (also known as Newtonsoft.Json) is a popular high-performance JSON framework for .NET.
json.net
2,231
questions
149
votes
9
answers
62k
views
How to handle both a single item and an array for the same property using JSON.net
I'm trying to fix my SendGridPlus library to deal with SendGrid events, but I'm having some trouble with the inconsistent treatment of categories in the API.
In the following example payload taken ...
- 2,433
48
votes
3
answers
7k
views
How can I parse a JSON string that would cause illegal C# identifiers?
I have been using NewtonSoft JSON Convert library to parse and convert JSON string to C# objects. But now I have came across a really awkward JSON string and I am unable to convert it into C# object ...
- 2,423
116
votes
6
answers
72k
views
Deserializing polymorphic json classes without type information using json.net
This Imgur api call returns a list containing both Gallery Image and Gallery Album classes represented in JSON.
I can't see how to deserialize these automatically using Json.NET given that there is ...
- 1,926
340
votes
9
answers
382k
views
How to implement custom JsonConverter in JSON.NET?
I am trying to extend the JSON.net example given here
http://james.newtonking.com/projects/json/help/CustomCreationConverter.html
I have another sub class deriving from base class/Interface
public ...
- 3,775
859
votes
22
answers
1.0m
views
How can I deserialize JSON to a simple Dictionary<string,string> in ASP.NET?
I have a simple key/value list in JSON being sent back to ASP.NET via POST. Example:
{ "key1": "value1", "key2": "value2"}
I AM NOT TRYING TO DESERIALIZE INTO STRONGLY-TYPED .NET OBJECTS
I simply ...
- 35k
504
votes
9
answers
497k
views
Deserialize JSON object into dynamic object using Json.net
Is it possible to return a dynamic object from a json deserialization using json.net? I would like to do something like this:
dynamic jsonResponse = JsonConvert.Deserialize(json);
Console.WriteLine(...
- 36.9k
37
votes
2
answers
26k
views
TypeNameHandling caution in Newtonsoft Json
On this link, in remarks section it's mentioned that:
TypeNameHandling should be used with caution when your application deserializes JSON from an external source. Incoming types should be ...
- 513
209
votes
7
answers
195k
views
Parse JSON in C#
I'm trying to parse some JSON data from the Google AJAX Search API. I have this URL and I'd like to break it down so that the results are displayed. I've currently written this code, but I'm pretty ...
- 12.8k
530
votes
4
answers
440k
views
How can I change property names when serializing with Json.net?
I have some data in a C# DataSet object. I can serialize it right now using a Json.net converter like this
DataSet data = new DataSet();
// do some work here to populate 'data'
string output = ...
- 10.4k
621
votes
27
answers
519k
views
JSON.NET Error Self referencing loop detected for type
I tried to serialize POCO class that was automatically generated from Entity Data Model .edmx and when I used
JsonConvert.SerializeObject
I got the following error:
Error Self referencing loop ...
- 6,679
10
votes
1
answer
3k
views
Create a strongly typed c# object from json object with ID as the name
I am trying to make use of the API for a well known online meeting provider. One of their API calls returns an object that looks like this.
{
"5234592":{
"pollsAndSurveys":{
"...
- 467
36
votes
1
answer
10k
views
Does Json.NET cache types' serialization information?
In .NET world, when it comes to object serialization, it usually goes into inspecting the object's fields and properties at runtime. Using reflection for this job is usually slow and is undesirable ...
- 17.5k
199
votes
6
answers
185k
views
JSON.net: how to deserialize without using the default constructor?
I have a class that has a default constructor and also an overloaded constructor that takes in a set of parameters. These parameters match to fields on the object and are assigned on construction. ...
- 3,421
723
votes
17
answers
641k
views
How to ignore a property in class if null, using json.net
I am using Json.NET to serialize a class to JSON.
I have the class like this:
class Test1
{
[JsonProperty("id")]
public string ID { get; set; }
[JsonProperty("label")]
public string ...
- 25.7k
333
votes
12
answers
667k
views
How to convert JSON to XML or XML to JSON in C#?
I started to use Json.NET to convert a string in JSON format to object or viceversa. I am not sure in the Json.NET framework, is it possible to convert a string in JSON to XML format and viceversa?
- 38k
173
votes
5
answers
398k
views
Cannot deserialize the JSON array (e.g. [1,2,3]) into type ' ' because type requires JSON object (e.g. {"name":"value"}) to deserialize correctly
I have this JSON:
[
{
"Attributes": [
{
"Key": "Name",
"Value": {
"Value": "Acc 1",
"Values": [
...
- 2,143
147
votes
5
answers
380k
views
Deserializing JSON data to C# using JSON.NET
I'm relatively new to working with C# and JSON data and am seeking guidance. I'm using C# 3.0, with .NET3.5SP1, and JSON.NET 3.5r6.
I have a defined C# class that I need to populate from a JSON ...
user305145
61
votes
2
answers
66k
views
Setting the default JSON serializer in ASP.NET MVC
I'm working on an existing application that has been partially converted over to MVC. Whenever a controller responds with a JSON ActionResult, the enums are sent as numbers opposed to the string name....
- 17.4k
8
votes
3
answers
13k
views
JSON.NET Parser *seems* to be double serializing my objects
My problem is this:
This is the response being sent back from my WebAPI controller.
"[
[
{\"id\":\"identifier\"},
{\"name\":\"foobar\"}
]
]"
Notice that the response is wrapped in ...
- 3,134
369
votes
6
answers
353k
views
.NET NewtonSoft JSON deserialize map to a different property name
I have following JSON string which is received from an external party.
{
"team":[
{
"v1":"",
"attributes":{
"eighty_min_score":"",
"home_or_away":"...
- 5,473
112
votes
5
answers
165k
views
Parsing JSON using Json.net
I'm trying to parse some JSON using the JSon.Net library. The documentation seems a little sparse and I'm confused as to how to accomplish what I need. Here is the format for the JSON I need to ...
- 2,850
69
votes
7
answers
43k
views
Can I specify a path in an attribute to map a property in my class to a child property in my JSON?
There is some code (which I can't change) that uses Newtonsoft.Json's DeserializeObject<T>(strJSONData) to take data from a web request and convert it to a class object (I can change the class). ...
- 2,027
57
votes
5
answers
36k
views
How do I use JSON.NET to deserialize into nested/recursive Dictionary and List?
I need to deserialize a complex JSON blob into standard .NET containers for use in code that is not aware of JSON. It expects things to be in standard .NET types, specifically Dictionary<string, ...
- 733
22
votes
3
answers
22k
views
Json.Net Serialization of Type with Polymorphic Child Object
We would like to be able to serialize/deserialize json from/to C# classes, with the main class having an instance of a polymorphic child object. Doing so is easy using Json.Net's TypeNameHandling.Auto ...
- 5,794
2
votes
3
answers
4k
views
How to deserialize an array of values with a fixed schema to a strongly typed data class?
I am having some trouble figuring out a clean (as possible) way to deserialize some JSON data in a particular format. I want to deserialize the data to strongly typed data object classes, pretty ...
- 148
343
votes
12
answers
748k
views
Deserializing JSON to .NET object using Newtonsoft (or LINQ to JSON maybe?)
I know there are a few posts about Newtonsoft so hopefully this isn't exactly a repeat...I'm trying to convert JSON data returned by Kazaa's API into a nice object of some kind
WebClient client = new ...
- 4,752
199
votes
7
answers
153k
views
Where did IMvcBuilder AddJsonOptions go in .Net Core 3.0?
I've just upgraded my ASP web API project from .NET Core 2.0 to 3.0. I was using
services.AddMvc()
.AddJsonOptions(opts => opts.SerializerSettings.ContractResolver
= new ...
- 3,397
18
votes
2
answers
11k
views
Line delimited json serializing and de-serializing
I am using JSON.NET and C# 5. I need to serialize/de-serialize list of objects into line delimited json. http://en.wikipedia.org/wiki/Line_Delimited_JSON. Example,
{"some":"thing1"}
{"some":"thing2"}
...
190
votes
7
answers
269k
views
Can Json.NET serialize / deserialize to / from a stream?
I have heard that Json.NET is faster than DataContractJsonSerializer, and wanted to give it a try...
But I couldn't find any methods on JsonConvert that take a stream rather than a string.
For ...
- 3,468
143
votes
6
answers
156k
views
Json.net serialize/deserialize derived types?
json.net (newtonsoft)
I am looking through the documentation but I can't find anything on this or the best way to do it.
public class Base
{
public string Name;
}
public class Derived : Base
{
...
- 10.2k
44
votes
4
answers
131k
views
Deserialize JSON to nested C# Classes
Below is a (slightly) stripped down response I get from a REST API upon successful creation of a new "job code" entry. I need to deserialize the response into some classes, but I'm stumped.
...
- 495
7
votes
5
answers
12k
views
JSON.Net throws StackOverflowException when using [JsonConvert()]
I wrote this simple code to Serialize classes as flatten, but when I use [JsonConverter(typeof(FJson))] annotation, it throws a StackOverflowException. If I call the SerializeObject manually, it ...
- 4,198
215
votes
5
answers
580k
views
How to write a JSON file in C#?
I need to write the following data into a text file using JSON format in C#. The brackets are important for it to be valid JSON format.
[
{
"Id": 1,
"SSN": 123,
"Message": "whatever"
...
- 2,685
73
votes
5
answers
66k
views
Detect if deserialized object is missing a field with the JsonConvert class in Json.NET (Newtonsoft)
I'm trying to deserialize some JSON objects using Json.NET. I've found however that when I deserialize an object that doesn't have the properties I'm looking for that no error is thrown up but a ...
- 1,142
81
votes
5
answers
70k
views
Deserialize json with known and unknown fields
Given following json result:
The default json result has a known set of fields:
{
"id": "7908",
"name": "product name"
}
But can be extended with ...
- 2,989
59
votes
5
answers
86k
views
How to parse huge JSON file as stream in Json.NET?
I have a very, very large JSON file (1000+ MB) of identical JSON objects. For example:
[
{
"id": 1,
"value": "hello",
"another_value": "world",
"value_obj": {
...
- 4,964
189
votes
17
answers
209k
views
Casting interfaces for deserialization in JSON.NET
I am trying to set up a reader that will take in JSON objects from various websites (think information scraping) and translate them into C# objects. I am currently using JSON.NET for the ...
- 7,606
103
votes
7
answers
76k
views
Using JSON.NET as the default JSON serializer in ASP.NET MVC 3 - is it possible?
Is it possible to use JSON.NET as default JSON serializer in ASP.NET MVC 3?
According to my research, it seems that the only way to accomplish this is to extend ActionResult as JsonResult ...
- 7,229
78
votes
5
answers
90k
views
how to deserialize JSON into IEnumerable<BaseType> with Newtonsoft JSON.NET
given this JSON:
[
{
"$id": "1",
"$type": "MyAssembly.ClassA, MyAssembly",
"Email": "[email protected]",
},
{
"$id": "2",
"$type": "MyAssembly.ClassB, MyAssembly",
"Email": "...
- 37k
45
votes
3
answers
28k
views
How to serialize a Dictionary as part of its parent object using Json.Net
I'm using Json.Net for serialization.
I have a class with a Dictionary:
public class Test
{
public string X { get; set; }
public Dictionary<string, string> Y { get; set; }
}
Can I ...
- 553
8
votes
1
answer
17k
views
Deserializing JSON into an object
I have some JSON:
{
"foo" : [
{ "bar" : "baz" },
{ "bar" : "qux" }
]
}
And I want to deserialize this into a collection. I have defined this class:
public class Foo
{
...
- 150k
208
votes
8
answers
264k
views
Specifying a custom DateTime format when serializing with Json.Net
I am developing an API to expose some data using ASP.NET Web API.
In one of the API, the client wants us to expose the date in yyyy-MM-dd format. I don't want to change the global settings (e.g. ...
- 3,686
81
votes
9
answers
456k
views
Using JsonConvert.DeserializeObject to deserialize Json to a C# POCO class
Here is my simple User POCO class:
/// <summary>
/// The User class represents a Coderwall User.
/// </summary>
public class User
{
/// <summary>
/// A User's username. eg: "...
- 36.2k
82
votes
3
answers
143k
views
How to set custom JsonSerializerSettings for Json.NET in ASP.NET Web API?
I understand that ASP.NET Web API natively uses Json.NET for (de)serializing objects, but is there a way to specify a JsonSerializerSettings object that you want for it to use?
For example, what if ...
- 14.7k
3
votes
2
answers
3k
views
How to deserialize a child object with dynamic (numeric) key names?
how can I deserialize below json structure using newtonsoft json.net in .net.
{
"users" : {
"parentname":"test",
"100034" : {
"name" : "tom",
"state" : "...
- 33
93
votes
9
answers
115k
views
Using Json.NET converters to deserialize properties
I have a class definition that contains a property that returns an interface.
public class Foo
{
public int Number { get; set; }
public ISomething Thing { get; set; }
}
Attempting to ...
- 41.3k
62
votes
7
answers
38k
views
Deserializing JSON when sometimes array and sometimes object
I'm having a bit of trouble deserializing data returned from Facebook using the JSON.NET libraries.
The JSON returned from just a simple wall post looks like:
{
"attachment":{"description":""},
...
- 14.3k
184
votes
13
answers
123k
views
Making a property deserialize but not serialize with json.net
We have some configuration files which were generated by serializing C# objects with Json.net.
We'd like to migrate one property of the serialised class away from being a simple enum property into a ...
- 39.3k
15
votes
1
answer
15k
views
What is the correct way to use JSON.NET to parse stream of JSON objects?
I have a stream of JSON objects that looks somewhat like this:
{...}{...}{...}{...}...
So basically a concatenated list of JSON objects without any separator.
What's the proper way to deserialize ...
- 21.2k
267
votes
46
answers
490k
views
Could not load file or assembly 'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'
I am getting the Error
System.IO.FileLoadException : Could not load file or assembly
'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral,
PublicKeyToken=30ad4fe6b2a6aeed' or one of its ...
- 2,671