.Net Core API - Route Parameters in Query String not working-CodePudding

We are in the process of upgrading our Web API to .Net Core. The API is an Employees API with Employee Search and GET endpoints as below:

GET /employees/{id}
GET /employees

For the Get endpoint, currently the both the below calls works:

https://example.com/employees/001
https://example.com/employees/{id}?id=001

After upgrading the code to .Net Core 6.0, only the below call work:

https://example.com/employees/001

The other call with id in the query string does not work. Is there a way to get both the calls working in .Net Core

CodePudding user response：

This is all how you define your routes. If you put the parameter in the route, like /employees/001, it will look for that path to determine which function to hit. So for instance I setup 2 routes that call 2 functions:

    [Route("Stuff/{id}")]
    public IActionResult StuffWithIDInPath(int id)
    {
        ViewData["idVal"] = id;
        return View("SomeStuff");
    }

    [Route("Stuff")]
    public IActionResult StuffWithIDInQS(int id)
    {
        ViewData["idVal"] = id;
        return View("SomeStuff");
    }

The first route is hit when I go to something/stuff/37

And the second function does not have the parameter in the route, but it is also a parameter to the function, so it knows to look for it if it shows up:

But perhaps you want one function to handle both scenarios, and you can do that two if you just define the routes correctly for the same function.

    [Route("Stuff/{id}")]
    [Route("Stuff")]
    public IActionResult StuffWithIDEitherPlace(int id)
    {
        ViewData["idVal"] = id;
        return View("SomeStuff");
    }

In that case, either URL will go to that function, handling parameters in the route or as a querystring.

CodePudding user response：

your action route attribute should have id as an optional parameter

     [HttpGet("~/employees/{id?}")]
    public IActionResult Get(int? id)

or if a controller is Employees

 public class Employees : ApiController
..........
    [HttpGet("id?}")]
    public IActionResult Get(int? id)