How can versioning be done in ASP.NET Core Web Api

Question

In previous asp.net web api, I implement DefaultHttpControllerSelector to specify how I want the request to locate my controller. I often have diff

Answer 1

For that Add service API versioning to your ASP.NET Core applications

  public void ConfigureServices( IServiceCollection services )
    {
        services.AddMvc();
        services.AddApiVersioning();

        // remaining other stuff omitted for brevity
    }

QUERYSTRING PARAMETER VERSIONING

[ApiVersion( "2.0" )]
[Route( "api/helloworld" )]
public class HelloWorld2Controller : Controller {
    [HttpGet]
    public string Get() => "Hello world!";
}

So this means to get 2.0 over 1.0 in another Controller with the same route, you'd go here:

/api/helloworld?api-version=2.0

we can have the same controller name with different namespaces

URL PATH SEGMENT VERSIONING

 [ApiVersion( "1.0" )]
 [Route( "api/v{version:apiVersion}/[controller]" )]
 public class HelloWorldController : Controller {
    public string Get() => "Hello world!";
 }
[ApiVersion( "2.0" )]
[ApiVersion( "3.0" )]
[Route( "api/v{version:apiVersion}/helloworld" )]
public class HelloWorld2Controller : Controller {
    [HttpGet]
    public string Get() => "Hello world v2!";

    [HttpGet, MapToApiVersion( "3.0" )]
    public string GetV3() => "Hello world v3!";
}

Header Versioning

  public void ConfigureServices( IServiceCollection services )
    {
        services.AddMvc();
        services.AddApiVersioning(o => o.ApiVersionReader = new HeaderApiVersionReader("api-version"));
    }

When you do HeaderApiVersioning you won't be able to just do a GET in your browser, so I'll use Postman to add the header (or I could use Curl, or WGet, or PowerShell, or a Unit Test):

Image

please refer https://www.hanselman.com/blog/ASPNETCoreRESTfulWebAPIVersioningMadeEasy.aspx