How to receive parameters in ASP.NET Core MVC

1. Query String Parameters : You can receive values from the query string in the URL.

     Request URL : /Home/Index?name=John

    public IActionResult Index(string name) {
       
    }

2. Route Parameters : You can use parameters defined in the route template.

    Request URL : /Home/Index/1

    [Route("Home/Index/{id}")]
    public IActionResult Index(int id) {

    }

3. Form Data : You can receive form data from HTTP POST requests.

    Request Body(form data) : name = john

    [HttpPost]
    public IActionResult Index([FromForm] string name)

4. Request Body : You can receive the HTTP request body. This is mainly used to receive JSON data.

    Request Body(Json): {"Name":"John","Age":30}
    public class User {
        public string Name { get; set; }
        public int Age { get; set; }
    }

    [HttpPost]
    public IActionResult Index([FromBody] User user) {
    }

  5. Route Data : You can receive values from route data. 

    Request URL : /Home/Index/1

    public IActionResult Index() {
        var id = RouteData.Values["id"];
    }