.net 核心在获取请求时返回空主体 json

Question

Having troubles to return json .net core 6.0 C# I'm using NewtonSoft json library Obviously I'm doing something wrong...

using NetMQ;
using NetMQ.Sockets;
using Newtonsoft.Json.Linq;
using System.Text;

static JObject j_tmp = new JObject();

private static async Task<IResult> Command1()
{
   j_tmp["test"] = "1234";
   j_tmp["number"] = 18;
   //return Results.Json(j_tmp ); //Doesn;t work, empty body
   //return Results.Json(j_tmp.ToString()); //Doesn't work, adds "\r\n" on each break line
   return Results.Content(j_tmp.ToString(Newtonsoft.Json.Formatting.None), "application/json; charset=utf-8"); //WORKS
            
}

Answer 1

Assume you are working on ASP.NET Core project (as your question mentioned a GET request) and you are asking how to return a simple json.

The simplest way is to return an anonymous object in your action method.

In your controller:

[HttpGet]
public IActionResult YourAction() 
{
    return OK(new { test = "1234", number = 18 });
}

Is that what you need?

Answer 2

when I return JObject object, it appears empty on receiving (frontend) side

Maybe you want a way to pass the JObject object from contoller to the view ?

If so, you can refer to below demo.

In controller:

static JObject j_tmp = new JObject();
        public IActionResult Index()
        {
            j_tmp["test"] = "1234";
            j_tmp["number"] = 18;
            ViewBag.j_tmp= j_tmp;   
            return View(j_tmp);
        }

In the view:

@ViewBag.j_tmp

Result:

Answer 3

use this method

private static async Task<JsonResult> Command1()
{
   j_tmp["test"] = "1234";
   j_tmp["number"] = 18;
   //return Results.Json(j_tmp ); //Doesn;t work, empty body
   //return Results.Json(j_tmp.ToString()); //Doesn't work, adds "\r\n" on each break line
   return Json(new JsonResult(null, new { test = j_tmp["test"], number = j_tmp["number"] }));
            
}