Api Post Requist with single Paramater

Question

This would probably be a very easy problem to solve but i dont seem to udnerstand it.

Client-side:
axios.post("https://localhost:44332/api/Products/CreateCategory",name)

backend:

[HttpPost("CreateCategory")]
        public async Task<IActionResult> CreateCategory(String name)
        {

if try that or this:

[HttpPost("CreateCategory")]
        public async Task<IActionResult> CreateCategory([FromBody] string name)
        {

it does not work but if i do this:

[HttpPost("CreateCategory")]
        public async Task<IActionResult> CreateCategory(CategoryDto dto)
        {

model:

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

it works perfectly

How can use post request without the use of models.

Answer 1

Hi @osyris ,

To send a request with single parameter, you could try to use the following method:

1. Send parameter via query string.

Append the parameter at the end of the request url, code as below:

        //send parameter via query string  
        var name = "Tom";  
        var res = axios.post("https://localhost:44310/api/ToDo/CreateCategory?name=" + name);  

Api Controller:

    [Route("api/[controller]")]  
    [ApiController]  
    public class TodoController : ControllerBase  
    {   
        [HttpPost("CreateCategory")]  
        public async Task<IActionResult> CreateCategory(string name)  
        {  
            return Ok("Success");  
        }  

The result as below:

2. Send parameter via Form

Code like this:

        const resp = axios.post('https://localhost:44310/api/ToDo/CreateCategory', 'name=world');    

Api Controller:

    [Route("api/[controller]")]  
    [ApiController]  
    public class TodoController : ControllerBase  
    {   
        [HttpPost("CreateCategory")]  
        public async Task<IActionResult> CreateCategory([FromForm]string name)  
        {  
            return Ok("Success");  
        }  

The result like this:

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Best regards,
Dillion

Answer 2

You need to understand Encapsulation and information hiding.

https://en.wikipedia.org/wiki/Encapsulation_(computer_programming)

That's what a DTO, a class, provides is encapsulation. The 'name' data can have data that can make the URL malformed when passing data. The DTO prevents the URL from becoming malformed.

https://learn.microsoft.com/en-us/aspnet/web-api/overview/data/using-web-api-with-entity-framework/part-5