All Questions
686
questions
122
votes
6
answers
168k
views
How to set json serializer settings in asp.net core 3?
json serializer settings for legacy asp.net core applications were set by adding AddMvc().AddJsonOptions(), but I don't use AddMvc() in asp.net core 3. So how can I set global json serialization ...
- 2,626
99
votes
4
answers
57k
views
dotnet core System.Text.Json unescape unicode string
Using JsonSerializer.Serialize(obj) will produce an escaped string, but I want the unescaped version. For example:
using System;
using System.Text.Json;
public class Program
{
public static void ...
- 1,399
94
votes
15
answers
72k
views
.NET Core: Remove null fields from API JSON response
On a global level in .NET Core 1.0 (all API responses), how can I configure Startup.cs so that null fields are removed/ignored in JSON responses?
Using Newtonsoft.Json, you can apply the following ...
- 5,233
85
votes
12
answers
69k
views
How to globally set default options for System.Text.Json.JsonSerializer?
Instead of this:
JsonSerializerOptions options = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase
// etc.
};
var so = JsonSerializer.Deserialize<SomeObject>(...
- 3,464
73
votes
17
answers
127k
views
ASP.NET Core appsettings.json update in code
I am currently working on project using asp.net core v1.1, and in my appsettings.json I have:
"AppSettings": {
"AzureConnectionKey": "***",
"AzureContainerName": "**",
"NumberOfTicks": ...
user4588664
50
votes
1
answer
27k
views
What is difference between ObjectResult and JsonResult
There are two classes in Microsoft.AspNetCore.Mvc namespace:
ObjectResult and JsonResult.
Both convert the returned object in the JSON format.
What is difference between them and what is the ...
- 3,338
47
votes
1
answer
37k
views
Bind an IConfigurationSection to a complex object without ASP.NET Core
I have a .NET Core console application and want to read the appsettings.json and parse a section as List<Param> (without Dependency Injection or ASP.NET Core).
I already tried How do I bind a ...
- 3,419
46
votes
2
answers
53k
views
JsonConverter equivalent in using System.Text.Json
I'm starting to migrate some code I have from Newtonsoft.Json to System.Text.Json in a .net Core 3.0 app.
I migrated the properties from
[JsonProperty("id")] to [JsonPropertyName("id")]
but I ...
- 3,316
39
votes
1
answer
26k
views
System.Text.Json.JsonSerializer.Serialize returns empty Json object "{}" [duplicate]
Environment: Visual Studio 2019 16.3.8, .NET 3.0.100, .NET Core 3.0 unit test.
All 3 calls below to System.Text.Json.JsonSerializer.Serialize return empty objects: "{}"
I must be doing something ...
- 1,225
39
votes
4
answers
46k
views
Using .gitignore file to hide appsettings.json does not actually hide it
I have a C# MVC .Net Core application I'm building, the connection string is in a file called appsettings.json so what I want to do is simply exclude this from my git repository. I have added the ...
- 568
34
votes
5
answers
22k
views
Loading startup configuration from JSON located in memory
I am researching about how to load the startup config in .NET Core. I notice there are different ways to do that, I have seen XML, JSON, init file, and from a Dictionary located in memory (I will go ...
- 359
33
votes
4
answers
38k
views
System.Text.Json - Deserialize nested object as string
I'm trying to use the System.Text.Json.JsonSerializer to deserialize the model partially, so one of the properties is read as string that contains the original JSON.
public class SomeModel
{
...
- 12.4k
30
votes
3
answers
20k
views
Deserialize anonymous type with System.Text.Json
I am updating some apps for .NET Core 3.x, and as part of that I'm trying to move from Json.NET to the new System.Text.Json classes. With Json.NET, I could deserialize an anonymous type like so:
var ...
- 3,124
26
votes
1
answer
16k
views
How does reloadOnChange of Microsoft.Extensions.Configuration work for appsettings.json
In two projects (a .NET Core Web API and a .NET Core WindowsService) I am using appsettings.json for the configuration.
var configuration = new ConfigurationBuilder()
.SetBasePath(System.IO....
- 8,265
23
votes
0
answers
65k
views
Convert JToken To JObject [duplicate]
I'm trying to create an OAuth Handler in .Net Core, The api I'm using wraps the user data response in an property called data, But the OAuthTicket Context Expects a JObject and Not A JToken
var ...
- 20.4k
21
votes
2
answers
26k
views
How to deserialize stream to object using System.Text.Json APIs
I'm receiving a response from a web api call as a stream and need to deserialize it to a model.
This is a generic method, so I can't say which parts of code will use this and what's the response ...
- 621
20
votes
5
answers
14k
views
How to exclude a property from being serialized in System.Text.Json.JsonSerializer.Serialize() using a JsonConverter
I want to be able to exclude a property when serializing using System.Text.Json.JsonSerializer. I don't want to use a JsonIgnore attribute everywhere I want to do this. I would like to be able to ...
- 297
19
votes
5
answers
28k
views
How to serialize a dynamic object to a JSON string in dotnet core?
I am passing a JSON payload to an API Controller, and one of the fields is dynamic because the field needs to be passed again as a JSON string to another API. The dotnet core 3.1 middle layer shouldn'...
- 351
18
votes
5
answers
21k
views
Validate if string is valid json (fastest way possible) in .NET Core 3.0
I know i can use an external library(newtonsoft) with a try/catch to check if a string is valid json structure. I do not want to deserialize to an object (since the json can be one or many properties)...
- 4,679
17
votes
6
answers
16k
views
Invalid value for key 'authentication'
I have a .NET Core 3.0 app where am trying to connect to a Azure SQL database using EF Core and Active directory integrated authentication.
I have verified that I have access to this database from my ...
- 765
16
votes
7
answers
27k
views
Reading a JSON object from appsettings.json
TL;DR: How do I read a complex JSON object from appsettings.json?
I have a .NET Core 2.x application with multiple types of configuration values. appsettings.json looks like the snippet below and I ...
- 12.5k
16
votes
5
answers
11k
views
How to force System.Text.Json serializer throw exception when property is missing?
Json.NET behaviour could be defined by attributes: either use default or just throw an exception if json payload does not contain required property.
Yet System.Text.Json serializer silently does ...
- 13.7k
14
votes
3
answers
11k
views
System Text JsonSerializer Deserialization of TimeSpan
In researching how to deserialize a TimeSpan using Newtonsoft's JSON.net I came across code in my current project that did not use Json.net. It used System.Text.Json.JsonSerializer and appeared to not ...
- 30.4k
14
votes
1
answer
14k
views
Custom JSON serializer for optional property with System.Text.Json
I'm trying to implement a JSON serialization mechanism which handles both null and missing JSON values, to be able to perform partial updates when needed (so that it does not touch the field in the ...
- 3,742
14
votes
3
answers
15k
views
appsettings.json in ASP.net Core 2.0 Preview configuration GetSection null
I was trying to call GetSection from injected configuration in the Startup.cs.
The Value was null, while indexer to a concrete section value returns non-null value. It seems to me a bug behind the ...
- 445
13
votes
6
answers
26k
views
Post Multiple Parameters Without DTO Class
I have an action on my web project which calls to an API
[HttpPost]
public async Task<IActionResult> ExpireSurvey(int id)
{
var token = await HttpContext.GetTokenAsync("...
- 1,327
13
votes
3
answers
39k
views
How to manually parse a JSON string in net-core 2.0
I have a json string with the following structure
{
"resource": "user",
"method": "create",
"fields": {
"name": "John",
"surname: "Smith",
"email": "[email protected]"...
- 61.7k
13
votes
1
answer
14k
views
How to ignore false values with System.Text.Json
I'm migrating from Newtonsoft.Json to System.Text.Json in my .NET Core 3.0 application. I'm trying to ignore false values.
In System.Text.Json I found the option to ignore null values:
...
- 2,244
13
votes
1
answer
4k
views
How can I hide response code 200 with Swashbuckle.AspNetCore?
Ciao,
I'm working on a asp.net web api core (target framework .NET Core 2.1). I'm documenting my API using Swagger specifications. I chose to use Swashbuckle.AspNetCore library.
I have one simple ...
- 1,921
13
votes
0
answers
4k
views
Dynamically ignore property on sealed class when serializing JSON with System.Text.Json [duplicate]
Question
Can I dynamically ignore a property from a sealed class using System.Text.Json.JsonSerializer?
Example Code
Example class from another library:
public sealed class FrozenClass
{
// [...
- 34.2k
12
votes
2
answers
3k
views
ASP.NET Core 5 returning JSON adding $id and $values properties
I'm using ASP.NET Core 5. As below, I'm using System.Text.Json:
public IActionResult Index()
{
var result = GetAllMenuItems();
return Ok(result);
}
The expected shape of my JSON is:
[
{
...
- 1,018
12
votes
1
answer
10k
views
Set Asp.Net Core MVC Json options
One of the classes that I have in my project called, say, AC, has a property Address that is of type IPEndPoint. This type, as well as IPAddress, are notorious for not being serializable to JSON by ...
- 9,461
12
votes
3
answers
6k
views
System.Text.Json.JsonReaderException isn't found in namespace
I'm converting a .NET Framework 4.5 project to .NET Core 3.1. My tests used to use Newtonsoft.Json to check if json is valid and now I would want to implement the same with the built-in System.Text....
- 175
11
votes
2
answers
6k
views
Migrate one method to System.Text.Json
I added NewtonsoftJson as middleware in .net core 3.1. I would love to move over to new System.Text.Json serializer.
I can´t just jump over but is there way to use the one from System.Text.Json in ...
- 111
11
votes
1
answer
14k
views
JObject missing in .NET core, in NewtonSoft package
I'm trying to load a json file in .NET Core. To do this I'm using the NewtonSoft package. I successfully installed it, and
using NewtonSoft.Json;
produces no compiler errors. However when I try to ...
- 376
11
votes
3
answers
13k
views
How do I bind a multi level configuration object using IConfiguration in a .net Core application?
I'm trying to bind to a custom configuration object which should be populated by an appsettings.json file.
My appsettings looks a bit like:
{
"Logging": {
"IncludeScopes": true,
"LogLevel":...
- 7,093
11
votes
2
answers
11k
views
Insert JSON into PostgreSQL database with Dapper ORM (.NET Core)
Title pretty much explains it. Everything otherwise works fine and I can INSERT/UPDATE/DELETE/SELECT from my application using Dapper with no problem. The specific issue I am having is when attempting ...
10
votes
3
answers
6k
views
aws cli lambda-Could not parse request body into json
I have created aws lambda function in .net core and deployed.
I have tried executing function in aws console with test case and its working. but i am not able achieve the same with cli command
aws ...
- 2,677
10
votes
1
answer
11k
views
hosting.json available options
Where can I find some documentation regarding which options are available on the hosting.json file? Right now I'm using the server.ulrs but I'm wondering if I can add the https certificate path/...
- 3,061
10
votes
2
answers
11k
views
How to serialize JSON to string without escape characters in .NET Core?
I would like to serialize a C# object to JSON in a string from .NET Core.
I have tried with this code, but it results in a string with escape characters for the quotes:
string s = JsonConvert....
- 2,586
10
votes
2
answers
9k
views
How to properly set up snake case JSON for dotnet core api?
I've managed to serialize the api responses to the snake_case naming convention by using the following in my Startup.cs. This way it returns my DTO's as snake cased JSON.
services
.AddMvc()
...
- 4,764
10
votes
4
answers
14k
views
System.Text.Json Deserialize nested object from API call - Data is wrapped in parent JSON property
I have an API JSON response that wraps the data content in a data property, which looks like this:
{
"data":{
"email":"[email protected]",
"mobile":"+1555555123",
"id":4,
...
- 2,927
10
votes
1
answer
7k
views
JsonSerializer.Deserialize expected to throw exception when deserializing different class
In .NET Core 3.1 I use System.Text.Json.JsonSerializer to handle my Json objects. When I tried to write an error case when the JsonSerializer.Deserialize<T>() gets a Json string that is of a ...
- 103
10
votes
0
answers
3k
views
Setting ContentRoot and WebRoot in ASP.NET Core at runtime (e.g. using a config file)
I have an ASP.NET Core Website self hosted within a Windows Service that gets installed on multiple machines. I don't want to hardcode the WebRoot directory or depend on its relative path inside ...
- 1,667
9
votes
1
answer
18k
views
Deserialize json with C# .NET Core
Im trying to deserialize data that Ive got over POST in JSON format but having some problem.
The error message is:
SerializationException: Expecting state 'Element'.. Encountered 'Text' with name '...
- 1,055
9
votes
1
answer
9k
views
Deploying Stage/Production appsettings Asp.net Core
No the guide seems quite clear (to me at least) on how production settings can be put in place. They just talk about how some of this works, but there is no step-by-step guide. I have done the ...
- 2,043
9
votes
1
answer
4k
views
How to decode websocket connect as a json stream?
My client is connecting to a websocket server and the communications are all in json format. I use the ClientWebSocket and its ReceiveAsync method as documented. My read loop is something like this:
...
- 13.5k
9
votes
1
answer
16k
views
Property 'JsonResult.SerializerSettings' must be an instance of type 'System.Text.Json.JsonSerializerOptions'
I am developing a page that shows the webgrid of all values of Leave Type Option (which is a model containing id, LeaveType and status). In my controller, I have written something below.
After I run ...
- 179
9
votes
4
answers
5k
views
What is the equivalent of Newtonsoft.Json DefaultValueHandling = DefaultValueHandling.Ignore option in System.Text.Json
I'm migrating from Newtonsoft.Json to System.Text.Json in my .NET Core 3.0 application.
How do I get have the same behaviour with System.Text.Json as I have in my .NET Core 2.2 app with Newtonsoft....
- 2,244
8
votes
1
answer
7k
views
net core 2.0 appsettings.json save on bin directory
I am new in net core 2.0.
I am connecting to datbase. I am used to use an App.Config or Web.Config to set the connection string. But in net core 2.0 uses appsettings.json file instead.
When I ...
- 2,298