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apiasp.net-core.net-coregetpostman

IEnumerable as URI-parameter to NET Core API

What would be the best way of receiving IEnumerable as a URI-parameter for a GET endpoint in .NET Core 3.x

In deeper context: What I want to do is filtering out data depending on a number of GUIDs´.

So far I've got

    [HttpGet]
    public ActionResult Get(int allowedMissing, IEnumerable<Guid> ids)
    .
    .
    .

Im calling the endpoint using Postman as such: /endpoint?allowedMissing=2&ids=cab0cfcb-8eb2-4313-8064-e7b0841d4f8a&ids=b2b944c2-6b4a-4c32-9a2f-472b891e4843

This results in a 415 Unsupported Media Type without hitting any breakpoints inside the controller.

Solution

  • Ok, so default for receiving IEnumerable in an Action seems to be in body and will require decorating the parameter with FromQuery if sent as query.

    Changing to this solved my problem:

    [HttpGet]
public ActionResult Get(int allowedMissing, [FromQuery] IEnumerable<Guid> ids)
.
.
.