Json.NET has been removed from the ASP.NET Core 3.0 shared framework. You can use the new JSON serializer layers on top of the high-performance Utf8JsonReader and Utf8JsonWriter. It deserializes objects from JSON and serializes objects to JSON. Memory allocations are kept minimal and includes support for reading and writing JSON with Stream asynchronously. Json.NET has been removed from the ASP.NET Core 3.0 shared framework. You can use the new JSON serializer layers on top of the high-performance Utf8JsonReader and Utf8JsonWriter. It deserializes objects from JSON and serializes objects to JSON. Memory allocations are kept minimal and includes support for reading and writing JSON with Stream asynchronously.
Active5 months ago
I am new to ASP.Net Web Api Core. I have been using ASP.Net MVC for past few years and I always have written an
ActionFilter and used JSON.Net for Serializing data into JSON . So, in that way I replaced Microsoft's JavaScript Serializer (which is slower than JSON.Net ) with JSON.Net (it is claimed to be 400% faster).
How to do all this in ASP.Net Web Api Core? Where to change the default formattor?
Note: Please feel free to ask if you have any questions.
Thanks
Super Coder
Net Core Json Serializer SoftwareSuper Coder
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2 Answers
ASP.NET Core already uses JSON.NET as
JavaScriptSerializer isn't implemented/ported to .NET Core.
Microsoft.AspNetCore.Mvc depends on Microsoft.AspNetCore.Formatter.Json which depends on Microsoft.AspNetCore.JsonPatch , which depends on Newtonsoft.Json (see source).
Update
This is only true for ASP.NET Core 1.0 to 2.2. ASP.NET Core 3.0 removes the dependency on JSON.NET and uses it's own JSON serializer.
TsengTseng
.net Core Configure Json Serializer
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here is a code snippet to adjust the settings for a .net core application
KieranKieran
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Not the answer you're looking for? Browse other questions tagged jsonserializationasp.net-web-apiasp.net-corejson.net or ask your own question.Asp.net Core Json Serializer Lowercase
JSON has become an essential part of virtually all modern .NET applications and in many cases even surpassed the usage of XML. However, .NET hasn't had a (great) built-in way to deal with JSON. Instead we've relied on Json.NET which continues to serve the .NET ecosystem well.
Moving forward, we plan on making some changes to our JSON support:
Below are more details around this plan.
The need for high-performance JSON APIs
The requirements for the .NET stack have changed a bit since the arrival of .NET Core. Historically, .NET has valued usability and convenience. With .NET Core, we've added a focus on performance, and we've made significant investments to serve high performance needs. And the improvements we made in the popular TechEmpower benchmark are a testament to that.
With .NET Core 2.1, we've added a brand new primitive called Span<T> that allows us to represent native memory and arrays in a uniform way. With this type, we've also added a set of parsing and encoding APIs that are much more memory efficient without having to resort to unsafe code.
Part of the work of minimizing allocations is to avoid having to transcode UTF-8 payloads into UTF-16 strings, purely for parsing reasons. Currently, Json.NET is implemented by reading UTF-16. We need the ability to read (and write) JSON documents directly in UTF-8 because most network protocols (including HTTP) use UTF-8.
During .NET Core 2.1 we've learned that updating our existing APIs to leverage
Span<T> has limits. While we did add a bunch of overloads that accept spans, we also had to produce brand new APIs that are designed around minimizing allocations and dealing with buffers, which we exposed in System.Buffers namespaces. And with System.IO.Pipelines we've also added a programming model that enables developers to share buffers without having to deal with lifetime issues.
Based on these experiences we believe in order to support JSON parsing, we'll need to expose a new set of JSON APIs that are specifically geared for high-performance scenarios.
You might wonder why we can't just update Json.NET to include support for parsing JSON using
Span<T> ? Well, James Newton-King -- the author of Json.NET -- has the following to say about that:
Json.NET was created over 10 years ago, and since then it has added a wide range of features aimed to help developers work with JSON in .NET. In that time Json.NET has also become far and away NuGet's most depended on and downloaded package, and is the go-to library for JSON support in .NET. Unfortunately, Json.NET's wealth of features and popularity works against making major changes to it. Supporting new technologies like
Span<T> would require fundamental breaking changes to the library and would disrupt existing applications and libraries that depend on it.
Going forward Json.NET will continue to be worked on and invested in, both addressing known issues today and supporting new platforms in the future. Json.NET has always existed alongside other JSON libraries for .NET, and there will be nothing to prevent you using one or more together, depending on whether you need the performance of the new JSON APIs or the large feature set of Json.NET.
Move Json.NET integration into a separate NuGet package
Today, you cannot use ASP.NET Core without Json.NET because it is a dependency of ASP.NET Core itself. Over the years, we've received feedback that the dependency can conflict with other libraries that have their own dependency on a different version of Json.NET. In the past, we've considered addressing this issue by using a private copy of Json.NET in ASP.NET. However, this would create problems when developers want to configure Json.NET (for instance, in order to control how the serializer behaves when formatting JSON objects).
Newtonsoft Json Serialize
Moving forward we'd like to:
Dotnet Core Json Serializer Settings
So the existing integration between ASP.NET Core and Json.NET will continue to be supported, but will be moving out of the platform and into a separate package. Boris fx continuum 11 download. However, since the integration is then designed to sit on top of the platform, it will also allow customers to update Json.NET to later versions.
Furthermore, customers who need more performance can also choose to use the new JSON APIs, at the expense of the rich feature set that Json.NET offers.
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