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Questions tagged [system.text.json]

System.Text.Json is the built-in JSON facilities added in .NET Core 3.0.

The System.Text.Json namespace provides high-performance, low-allocating, and standards-compliant capabilities to process JSON, which includes serializing objects to JSON text and deserializing JSON text to objects, with UTF-8 support built-in. It also provides types to read and write JSON text encoded as UTF-8, and to create an in-memory document object model (DOM) for random access of the JSON elements.

Additional details can be found in the how to article.

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C# System.Text.Json Deserializing when the response format changes due to flags in the request

I'm trying to consume a vendor's api using c# and System.Text.Json. Some API calls allow for flags in the request that add sections to the response. I'm not sure how to handle these (lack of experience). I can send and receive no problem to…
Hecatonchires
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BigInteger with system.text.json

I am pulling data from a public api which I do not control. One object contains a property "space":40110198681182961664. This property is too large for an ulong. The correct value type would be BigInteger. And here comes the issue. System.Text.Json…
julian bechtold
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Deserializing JSON with UTC/Zulu Time String using System.Text.Json

I am having some issues deserializing JSON that has a Zulu formatted time string. I continue to receive an exception that states the string is not a data and time. I have the following string being returned from and REST service. { ".issued":…
Ducky
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How can I exclude properties from JSON serialization using custom logic in System.Text.Json without using attribute?

I have an object that contains a Func property: public class Foo { public Func DoCalculation {get;init;} public string Bar {get;init;} } How can I exclude all Func<...> properties in any JSON serialization without using [JsonIgnore] or…
THX-1138
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Get JSON descendants using System.Text.Json in C#

I have written following method to get JSON descendants using System.Text.Json: public static IEnumerable GetDescendants(this JsonNode jsonNode) { switch (jsonNode) { case JsonObject jsonObject: …
Szyszka947
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Serializing object with System.Text.Json setting ReferenceHandler to ignore not working in .NET 7

I'm trying to serialize an object in ASP.NET Core MVC Web API into a JSON before returning it to the user. The object is from an EF Core database, and the controllers are generated using scaffolding with some include properties I've added which I'd…
meowbie
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Getting System.ArgumentException: An item with the same key has already been added while using System.Text.Json

I was trying to get a value from a json object during crawling data into SQL Server using System.Text.json. The json data's structure is like this: skus: 1v9beswiav1wo91j:{...,...} The key 1v9beswiav1wo91j is unreachabe to me, so I use JsonNode…
spigelspike0812
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JsonSerializer.Deserialize always returns Null

Trying to deserialize the following json string: string json =…
Mlamuli Zondo
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How to add JsonPropertyName to inherited properties?

How do I deserialize json to my class that is inheriting from base class but properties in base class do not match json? I cant's control base class. For example: { "prop1": "Value1", "prop2": "Value2" } I want to deserialize above to…
Pawel
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How do I deserialize NuGet.NuGetVersion into a class in C#?

I'm a beginner, just writing code for an application for my work and I was trying to deserialize a class, but encountered an error. I have a class named Nuget, that looks like this: public class Nuget { public string? Name { get; set; } …
Vincze Szilárd
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How to set DisableSystemTextJsonSourceGenerator from build.props file?

I'm having the same issue reported here: https://github.com/dotnet/runtime/issues/61602#issuecomment-971824612 basically: trying to use System.Text.Json 6 in a dotnetapp3.1 application (which cannot be upgraded at the moment). This causes that the…
dmorganb
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System.Text.Json.ThrowHelper.ThrowJsonException_SerializerCycleDetected

I got this error: JsonException: A possible object cycle was detected. This can either be due to a cycle or if the object depth is larger than the maximum allowed depth of 64. Consider using ReferenceHandler.Preserve on JsonSerializerOptions to…
pinale
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Why is JsonSerializer.Deserializer only partially populating my object?

I have a class defined as follows: public class NearestLocation { public Int32 ID { get; set; } public String Name { get; set; } public String TypeID { get; set; } public String SourceID { get; set; } public String Code { get;…
ChrisH
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What is the purpose of the `inputType` parameter of `JsonSerializer.Serialize`

System.Text.Json.JsonSerializer.Serialize is a set of overloads that serialize a C# object into json. The non-generic overloads all share three parameters - object? value which is the object to serialize; System.Text.Json.JsonSerializerOptions?…
Eamon Nerbonne
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TypeInfoResolver Modifier doesn't resolve correct type - it resolves base type instead of real type

I have difficulty replacing Newtonsoft's ContractResolver with System.Text.Json TypeInfoResolver Modifier. I have a ContractResolver that is responsible for serializing only specific properties: public sealed class BaseExceptionContractResolver :…
Misiu
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