c# - 迁移到 ASP.Net Core MVC 时，JSON 序列化/反序列化不起作用

Question

我们正在将网站从 ASP MVC .Net Framework 迁移到 .Net Core。在许多情况下，我们从页面向 Controller 发出 ajax POST 请求:

js:

var request = { Name: "bar" };
$.ajax({
    url: "/Home/foo",
    type: "POST",
    data: JSON.stringify(request),
    dataType: 'json',
    contentType: "application/json; charset=utf-8",
    success: function (response) {
        console.log();
    }
});

c# Controller :

[HttpPost]
public async Task<JsonResult> foo(FooRequest request)
{
    //request.Name is empty
    return Json(new { msg = "Success" });
}

c#模型:

public class FooRequest
{
    public string Name { get; set; }
}

这一切都适用于 .Net Framework，但在 Core 如果接收到的对象的所有属性都为 null 时会失败。

我试过同时使用 AddJsonOptions:

services.AddControllersWithViews()
    .AddJsonOptions(option =>
    {
        option.JsonSerializerOptions.PropertyNamingPolicy = null;
        option.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
    });

...和AddNewtonsoftJson:

services.AddControllersWithViews()
    .AddNewtonsoftJson(option =>
    {
        option.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver();
    });

...但它们都不起作用。

我需要做什么才能在 .Net Core 中获得与在 .Net Framework 中相同的行为？

更新

我得到了从 Postman 调用 endint 的相同行为(request.Name 为 null):

POST /home/foo HTTP/1.1
Host: localhost:44393
Content-Type: application/json

{ "Name": "bar" }

我还尝试序列化请求:

var request = { Name: "bar" };
$.ajax({
    url: "/Home/foo",
    type: "POST",
    data: request,
    dataType: 'json',
    contentType: "application/json; charset=utf-8",
    success: function (response) {
        console.log();
    }
});

...但结果相同

Answer 1

尝试将 FromBodyAttribute 添加到您的参数中:

[HttpPost]
public async Task<JsonResult> foo([FromBody] FooRequest request)
{
    //request.Name is empty
    return Json(new { msg = "Success" });
}

如果你用 ApiControllerAttribute 装饰你的 Controller ，你可以省略这个属性