How to call the controller parvily, passing an array as a parameter?

Question

ASP.NET

Hello everyone, there is such a controller:



The question is, how to access the GetParam action by passing an array to it?
I tried this method, but it ended with an error



PS If you delete the first action, then everything works as it should
PSS You cannot use the [Route] attribute

Answer 1

Emnip, when using convention-based routing, the Get prefix from the method name is discarded.
So the path should look like this:
http://localhost:5000/api/Rtb/Param?ids=1&ids=2

PS If you delete the first action, then everything works as it should

Apparently a collision, because you have both of them marked with HttpGet - so both will be on the same path. And FromQuery parameters are optional - so it cannot select one of them (which is most likely written in the log)
Remove the first action and leave only the option with the parameter

Answer 2

Try

http://localhost:5000/api/Rtb/GetParam?ids=68&ids=65

But in general, to transfer arrays to the controller with GET, in my opinion, is a perversion.