Configuring Multiple HttpVerbs using EndPoint Routing in ASP.Net Core 3.0

Question

I am getting an exception when I have multiple action methods with same verb i.e. POST, in the Account controller of my newly setup WebApi project using default template in Visual Studio. Here's the info about VS:

Microsoft Visual Studio Enterprise 2019
Version 16.3.10
VisualStudio.16.Release/16.3.10+29519.87

Here is the exception that I get:

InvalidOperationException: The method 'post' on path '/api/Account' is registered multiple times.

Here is my the default routing setup in the Startup file:

 app.UseEndpoints(endpoints => { endpoints.MapControllers(); });

I have also tried the following but it didn't help.

  endpoints.MapControllerRoute(
            name: "api",
            pattern: "{controller}/{id?}");

and

endpoints.MapControllerRoute(
            name: "api",
            pattern: "{controller}/{action}/{id?}");

I have read about the end point routing at the official docs as well, but I am not able to figure out what am I missing. You help is appreciated.

Salih H. · Accepted Answer · 2019-12-01 23:11:15Z

2

You need to pass template name i.e. [HttpPost("my-other-route")].

answered Dec 1, 2019 at 23:11

Salih H.

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2 Comments

Zeshan Munir Over a year ago

Is using route attribute necessary for all action methods in ASP.Net Core WebAPI?

Matt U Over a year ago

@SuperCoder the Route attribute means all HTTP verbs are accepted, and it's typically (in my experience, at least) used on the controller. The Http(Verb) attributes are used on controller actions. If you have multiple actions on the same controller with the same HTTP verb, their route templates have to be unique.

Xueli Chen · Accepted Answer · 2019-12-02 03:22:03Z

0

Try to change the Route attribute for the Controller as shown

[Route("api/[controller]/[action]")]
[ApiController]
public class StudentsController : ControllerBase
{ ... }

You could call the PostStudent action with the request route like https://localhost:44346/api/students/postStudent and call the PostStudentList action with the request route like https://localhost:44346/api/students/postStudentList.

edited Dec 2, 2019 at 3:22

answered Dec 2, 2019 at 3:13

Xueli Chen

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