Json Request Without Model Binding In ASP.NET Core WebAPI

Question

How can use ASP.NET Core WebAPI process json request without model binding?

I have more than one hundred APIs that need to be transferred to ASP.NET Core WebAPI, but I cannot design a model for each API because the number is too much.

In addition, I also need to use Swagger, so I cannot use string parsing like IActionResult Post(string json) or IActionResult Post(JObject obj).

Controller Code(with bug):

[ApiController]
[Route("[controller]")]
public class TestController : ControllerBase
{
    public class Person { public int Age { get; set; } }
    [HttpPost]
    public IActionResult Post([FromBody] string name, Person person)
    {
        return Ok(new
        {
            Name = name,
            person.Age
        });
    }
}

Postman:

POST /Test HTTP/1.1
Host: localhost:5000
Content-Type: application/json
Content-Length: 68

{
    "Name": "Test",
    "Person": {
        "Age": 10
    }
}

Current API Interface:

bool InsertPoint(PointInfo point);
bool[] InsertPoints(PointInfo[] points);
bool RemovePoint(string pointName);
bool[] RemovePoints(string[] pointNames);
string[] Search(SearchCondition condition, int count);
...

What i want to do in controller:

[HttpPost]
[SomeJsonBodyAttribute]
public IActionResult InsertPoint(PointInfo point);
[HttpPost]
[SomeJsonBodyAttribute]
public IActionResult InsertPoints(PointInfo[] points);
[HttpPost]
[SomeJsonBodyAttribute]
public IActionResult RemovePoint(string pointName);
[HttpPost]
[SomeJsonBodyAttribute]
public IActionResult RemovePoints(string[] pointNames);
[HttpPost]
[SomeJsonBodyAttribute]
public IActionResult Search(SearchCondition condition, int count);
...

What i want to do in request:

• RemovePoint

POST /Point/RemovePoint HTTP/1.1
Content-Type: application/json

{
    "pointName": "Test"
}

• Search

POST /Point/Search HTTP/1.1
Content-Type: application/json

{
    "condition": {
        ...
    },
    "count": 10
}

Answer 1

Be sure add Newtonsoft support in your project.You could refer to the following answer:

https://stackoverflow.com/a/65101721/11398810

Then you could get data like below:

[HttpPost]
public IActionResult Post([FromBody] JObject obj)
{
    //for list model:
    //obj["Person"][0]["Age"].ToString()
    return Ok(new { Name = obj["Name"].ToString(), Age = obj["Person"]["Age"].ToString() });
}

With json:

{
    "Name": "Test",
    "Person": {
        "Age": 10
    }
}

Result: