error: Literal sections cannot contain the '?' character

Question

[HttpGet("Verification?g={g}")]
        public IActionResult Verify (string g)
        {
            return View("Verification.cshtml");
        }

I wrote the routing like above but then there was an error "Literal sections cannot contain the '?' character."

how to write controller routing to create URL like http://localhost/VerificationController/Verify/Verification?g={guid}

Please help me to solve this, thank you in advance.

Answer 1

When any defined parameter not referenced as part of the route rule the MVC parser trying to interpret it as query parameter. Therefore, to get URL like

https://localhost/VerificationController/Verify/Verification?g=some_value

you can use:

[HttpGet("{controller}/Verify/Verification")]
public IActionResult Verify(string g)
{
    return View("Verification.cshtml");
}

Or, if you controller class is prefixed with [Route("[controller]")] you can use:

[HttpGet("Verify/Verification")]
public IActionResult Verify(string g)
{
    return View("Verification.cshtml");
}