Route url is including ?= - asp.net

Question

I'm using the following Razor in my page:
<a asp-action="Logs" asp-route-channel="#channel.Name">
<button class="btn btn-success btn-circle"><i class="fa fa-eye"></i></button>
</a>
channel is a string, not an integer, which is why I don't use id.
And this is how I'm routing it:
endpoints.MapControllerRoute("logs", "Dashboard/Logs/{channel}");
And in my Controller, I'm simply doing this for testing purposes:
public IActionResult Logs(string channel)
{
return Content(channel);
}
However, when the link is generated, I get something like this:
<a href="/Dashboard/Logs?channel=mychannel">
Instead of the expected:
<a href="/Dashboard/Logs/mychannel">
EDIT
Here's what I've tried:
[HttpGet("{channel}")]
public IActionResult Logs(string channel)
{
return Content(channel);
}
Which results in https://localhost:44351/mychannel
I've also tried:
[HttpGet("Dashboard/Logs/{channel}")]
public IActionResult Logs(string channel)
{
return Content(channel);
}
Which works as intended, but why should I have to include the whole path like that?

Answer 1

You are mapping to the default convention based route, which would most likely have {id} as a route parameter. Because it maps to the default and you included {channel} it would add that parameter as a query string instead of part of the URL.
You would need to include a custom route for that action in order to get the desired URL generation.
endpoints.MapControllerRoute(
name: "Logs",
pattern: "Dashboard/Logs/{channel}",
defaults: new { controller = "Dashboard", action = "Logs" });
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller}/{action}/{id?}",
defaults: new { controller = "Home", action = "Index" });
and the necessary route values would need to be included so that it maps to the intended route
<a asp-controller="Dashboard" asp-action="Logs" asp-route-channel="#channel.Name">
<button class="btn btn-success btn-circle"><i class="fa fa-eye"></i></button>
</a>