I am getting error “No HTTP resource was found that matches the request URI”

Question

Request URL:

/api/Test/Retrieve/14012638/?14012647

Endpoint:

[Route("Retrieve/{firstid}/{secondid?}")]       
public async Task<TestAPI> Retrieve(long firstid, long secondid)

Answer 1

It is always better to place your route at the controller level and your HTTP verb at the action level.

For your requirement, you can do this like below. I assume you are doing a GET operation.

[HttpGet("Retrieve/{firstid}/{secondid?}")]    
public async Task<WellsTradeAccountsInformation> Retrieve(long firstid, long secondid) { … }

If your controller' route is api/Test , then you can call this as:

GET /api/Test/Retrieve/14012638/14012647

or

GET /api/Test/Retrieve/14012638

As the second parameter is an optional value type, if you don't pass it will default to 0.