Post method of wb api

using System.Web.Http;

namespace WebApiDemo.Controllers
{
    public class AddController : ApiController
    {
        [HttpPost]
        public IHttpActionResult AddNumbers([FromBody] Numbers numbers)
        {
            if (numbers == null)
            {
                return BadRequest("Invalid input");
            }

            int sum = numbers.Number1 + numbers.Number2;
            return Ok(sum);
        }
    }

    public class Numbers
    {
        public int Number1 { get; set; }
        public int Number2 { get; set; }
    }
}

using System.Web.Http;

namespace WebApiDemo
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{action}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}

1. Test the API: Run your application, and you can test the API using a tool like Postman or any other REST client.

• HTTP Method: POST
• URL: http://localhost:YourPortNumber/api/add/addnumbers
• Headers: Content-Type: application/json
• Body: Raw JSON

{
    "Number1": 5,
    "Number2": 10
}

Hello Vishakha,

You can try the below way.

[ApiController]
[Route("api/[controller]")]
public class CalculateController : ControllerBase 
{ 
    [HttpPost] 
    public IActionResult Post(AddRequest addRequest) 
    { 
        int result = Add(addRequest); 
        return Ok(result); 
    }

    private int Add(AddRequest addRequest)
    {
        return addRequest.Num1 + addRequest.Num2;
    }
} 

public class AddRequest 
{ 
    public int Num1 { get; set; } 
    public int Num2 { get; set; } 
}

 

Calling from the postman

Check this:

using Microsoft.AspNetCore.Mvc;

namespace MyWebApi.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class CalculateController : ControllerBase
    {
        [HttpPost("add")]
        public ActionResult Add([FromBody] NumbersToAdd numbers)
        {
            int result = numbers.Number1 + numbers.Number2;
            return Ok(result);
        }
    }

    public class NumbersToAdd
    {
        public int Number1 { get; set; }
        public int Number2 { get; set; }
    }
}

Or

[ApiController]
[Route("api/[controller]")]
public class CalculateController : ControllerBase
{
    [HttpPost]
    [Route("add")]
    public IActionResult Add([FromForm] int num1, [FromForm] int num2)
    {
        int result = num1 + num2;
        return Ok(result);
    }
}