C# .net 6 routing: generic solution to get a parameter from query or path-CodePudding

I am trying to find a solution to get a parameter (username) from a GET request. This parameter can be sent either by query or in the path (both method are valid). Valid examples:

GET /users/my_name

GET /users?login=my_name

Using .NET 6 I found a solution to get this parameter from path:

[HttpGet("{login?}")]
public IActionResult Get(string login)
{
  if (login == null)
    return GetAllusers();
  return GetUserByLogin(login);
}

or to get this parameter from query:

[HttpGet]
public IActionResult Get(string login)
{
  if (login == null)
    return GetAllusers();
  return GetUserByLogin(login);
}

But I have no solution that will fill the login parameter in both cases. Is there a generic solution where I could have this parameter filled in both cases?

I found a workaround that is given bellow but I am not sure this is the best way to handle this problem:

[HttpGet("{login_path?}")]
public IActionResult Get(string login_path, string login)
{
  string user = (login_path != null) ? login_path : login;

  if (user == null)
    return GetAllusers();
  return GetUserByLogin(user);
}

CodePudding user response：

When path parameter is null read the value from query string using HttpContext.Request.Query.

[HttpGet("{login?}")]
public IActionResult Get(string login)
{
    login ??= HttpContext.Request.Query["login"];
        
    if (login == null)
        return GetAllusers();
    return GetUserByLogin(login);
}