Multiple get methods in .net core 3.1 web API

You'd be better off changing your urls to something like: api/movies/getByName/{name} and api/movies/getById/{id}.

Then:

1. GET /movies - gets all movies
2. GET /movies/getByName/{name} - finds all movies matching the specified name
3. GET /movies/getById/{id} - finds a movie by Id

When adding other actions, you can also add the action name to the route, which will help you avoid The request matched multiple endpoints.

Here is a demo:

[HttpGet]
public async Task<IActionResult> Get()
{
    return Ok();
}

[HttpGet("getByName/{name}")]
public async Task<IActionResult> GetByName(string name)
{
    return Ok();
}

[HttpGet("getById/{id}")]
public async Task<IActionResult> GetById(Guid Id)
{
    return Ok();
} 

Result:

Your Get and GetByName actions have no attribute route provided for them and are both matched to "api/Movies". In order to resolve that you need to add a route template to at least one of those actions, too.

A possible solution is:

[HttpGet]
public async Task<IActionResult> Get()
{
    var result = await moviesService.GetMoviesAsync();
    return Ok(result);
}

[HttpGet]
[Route("{name}")]
public async Task<IActionResult> GetByName([FromRoute] string name)
{
    var result = await moviesService.GetMoviesByNameAsync(name);
    return Ok(result);
}

Note that here the the url for movies with a specific name is no longer /movies?name={name}, but /movies/{name}.

If you absolutely wish to keep the URL /movies?name={name} you can merge the Get and GetByName actions in a single action that accepts a query string parameter name and based on its value execute your logic.

@Nishant, your is almost good with some minor changes. Below is the working solution. The comments are inline within the code.

[Route("api/[controller]")]
[ApiController]
public class MoviesController : ControllerBase
{
    //GET /movies - gets all movies.
    [HttpGet]
    public async Task<IActionResult> Get()
    {
        return Ok();
    }

    //GET /movies/name={name}` - finds all movies matching the specified name
    [HttpGet("{name}")]  //added the route
    public async Task<IActionResult> GetByName(string name) // modified the input parameter
    {
        return Ok();
    }

    //Get /Movies/{Id} - Find movie By Id
    [HttpGet("{Id:guid}", Name = "GetById")] //added the input type
    public async Task<IActionResult> GetById(Guid Id)
    {
        return Ok();
    }

}

Please let me know if this helps.

You can have multiple methods, keeping in mind that at the beginning of the controller you initialized the way to call the controller methods, like this:

    [Route("api/[controller]")]

.... each action or method must specify [action] and name

 [Route("[action]", Name = "GetPersona")]
    [HttpGet]
    public async Task<IActionResult> GetPersona(int Id)
    {
        bool ok = false;
        string mensaje = "Sin Datos";
        var data = await Task.Run(() => _repositoryPersonas.GetPersona(Id));
        if (data != null)
        {
            mensaje = "ok";
            ok = true;
        }
        return Ok(new { data, ok, mensaje });
    }


    [Route("[action]", Name = "ObtenerPersonas")]
    public async Task<IActionResult> ObtenerPersonas(int Ids)
    {
        bool ok = false;
        string mensaje = "Sin Datos";
        var data = await Task.Run(() => _repositoryPersonas.GetPersona(Ids));
        if (data != null)
        {
            mensaje = "ok";
            ok = true;
        }
        return Ok(new { data, ok, mensaje });
    }

route1https://localhost:44376/api/Personas/GetPersona?Id=1 route2https://localhost:44376/api/Personas/ObtenerPersonas?Id=1

I use this

[HttpGet("[action]")]
public async Task<IActionResult> GetByName([FromQuery(Name = "name")] string name)
{
    var result = await moviesService.GetMoviesByNameAsync(name);
    return Ok(result);
}

Drawing on the accepted answer from 'Yiyi You' I would make slight changes in accordance with the accepted answer (and others) to this question. Using hyphens will make you urls more 'crawlable' by search engines if it is a public api.

[HttpGet]
public async Task<IActionResult> Get()
{
    return Ok();
}

[HttpGet("get-by-name/{name}")]
public async Task<IActionResult> GetByName(string name)
{
    return Ok();
}

[HttpGet("get-by-id/{id}")]
public async Task<IActionResult> GetById(Guid Id)
{
    return Ok();
}

Step 1:- Create a fucntion with api end point and query param enter image description here

Step 2:- Hit the below url in browser (for GET methods) enter image description here