如何在 Asp.net Core Web Api 中默认使用 Newtonsoft.Json？
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How to use Newtonsoft.Json as default in Asp.net Core Web Api?
提问by Super Coder
I am new to ASP.Net Web Api Core. I have been using ASP.Net MVCfor past few years and I always have written an ActionFilterand used JSON.Netfor Serializingdata 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).
我是ASP.Net Web Api Core 的新手。我一直在使用ASP.Net MVC过去的几年里，我一直都写了ActionFilter，并用于JSON.Net为Serializing数据导入JSON。因此，通过这种方式，我用（据称快 400%）替换了 Microsoft 的JavaScript Serializer（比 慢）。JSON.NetJSON.Net
How to do all this in ASP.Net Web Api Core? Where to change the default formattor?
如何在ASP.Net Web Api Core 中完成所有这些？在哪里更改默认格式化程序？
Note: Please feel free to ask if you have any questions.
注意：如果您有任何问题，请随时提问。
Thanks
谢谢
采纳答案by MikeBeaton
In .NET Core 3.0+ include the NuGet package Microsoft.AspNetCore.Mvc.NewtonsoftJsonand then replace
在 .NET Core 3.0+ 中包含 NuGet 包Microsoft.AspNetCore.Mvc.NewtonsoftJson，然后替换
services.AddControllers();
in ConfigureServiceswith
在ConfigureServices与
services.AddControllers().AddNewtonsoftJson();
This is a pre-release NuGet package in .NET Core 3.0 but a full release package in .NET Core 3.1.
这是 .NET Core 3.0 中的预发布 NuGet 包，但 .NET Core 3.1 中的完整发布包。
I came across this myself, but I've found that the same answer with some additional info is in this SO question and answer.
我自己遇到过这个问题，但我发现在这个 SO question and answer 中有一些附加信息的相同答案。
Edit:As a useful update: code with the call to AddNewtonsoftJson()will compile and run even without installing the Microsoft.AspNetCore.Mvc.NewtonsoftJsonNuGet package. If you do that, it runs with bothconverters installed, but defaulting to the System.Text.Jsonconverter which you presumably don't want since you're reading this answer. So you must remember to install the NuGet packagefor this to work properly (andremember to re-install it if you ever clear down and redo you NuGet dependencies).
编辑：作为一个有用的更新：AddNewtonsoftJson()即使不安装Microsoft.AspNetCore.Mvc.NewtonsoftJsonNuGet 包，调用 的代码也会编译和运行。如果你这样做，它会在安装了两个转换器的情况下运行，但默认为System.Text.Json你可能不想要的转换器，因为你正在阅读这个答案。因此，您必须记住安装 NuGet 包以使其正常工作（如果您清除并重做 NuGet 依赖项，请记住重新安装它）。
回答by Tseng
ASP.NET Core already uses JSON.NET as JavaScriptSerializerisn't implemented/ported to .NET Core.
ASP.NET Core 已经使用 JSON.NET，因为JavaScriptSerializer没有实现/移植到 .NET Core。
Microsoft.AspNetCore.Mvcdepends on Microsoft.AspNetCore.Formatter.Jsonwhich depends on Microsoft.AspNetCore.JsonPatch, which depends on Newtonsoft.Json(see source).
Microsoft.AspNetCore.Mvc取决于Microsoft.AspNetCore.Formatter.Json哪个取决于Microsoft.AspNetCore.JsonPatch，哪个取决于Newtonsoft.Json（参见源代码）。
Update
更新
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.
这仅适用于 ASP.NET Core 1.0 到 2.2。ASP.NET Core 3.0 移除了对 JSON.NET 的依赖，并使用它自己的 JSON 序列化程序。
回答by Kieran
here is a code snippet to adjust the settings for a .net core application
这是调整 .net 核心应用程序设置的代码片段
public void ConfigureServices(IServiceCollection services)
{
services
.AddMvc()
.AddJsonOptions(options => {
// send back a ISO date
var settings = options.SerializerSettings;
settings.DateFormatHandling = Newtonsoft.Json.DateFormatHandling.IsoDateFormat;
// dont mess with case of properties
var resolver = options.SerializerSettings.ContractResolver as DefaultContractResolver;
resolver.NamingStrategy = null;
});
}
回答by Грозный
Just use Newtonsoft.Json Version=11.0.1 or higher
只需使用 Newtonsoft.Json Version=11.0.1 或更高版本
