Since there is no JavaScriptSerializer, what native implementation can be used to handle this?
我注意到JsonResult，我可以用它将数据格式化为JSON，但是我如何反序列化呢？
Or maybe I am missing some dependencies in project.json?
Since there is no JavaScriptSerializer, what native implementation can be used to handle this?
我注意到JsonResult，我可以用它将数据格式化为JSON，但是我如何反序列化呢？
Or maybe I am missing some dependencies in project.json?
You can use Newtonsoft.Json, it's a dependency of Microsoft.AspNet.Mvc.ModelBinding which is a dependency of Microsoft.AspNet.Mvc. So, you don't need to add a dependency in your project.json.
#using Newtonsoft.Json
....
JsonConvert.DeserializeObject(json);
注意，使用WebAPI控制器不需要处理JSON.
Json.NET已从ASP.NET Core 3.0共享框架中删除.
您可以在高性能Utf8JsonReader和Utf8JsonWriter之上使用新的JSON序列化器层.它从JSON反序列化对象，并将对象序列化为JSON.内存分配保持最小，并支持异步读取和写入JSON流.
To get started, use the JsonSerializer class in the System.Text.Json.Serialization namespace. See the documentation for information and samples.
To use Json.NET in an ASP.NET Core 3.0 project:
services.AddMvc()
.AddNewtonsoftJson();
Read Json.NET support in Migrate from ASP.NET Core 2.2 to 3.0 Preview 2 for more information.