Question

asp.net mvc routing pattern is

 {"some_parameter/{controller}/{action}/{id}"}

Is this a valid format if some_parameter can be null or string empty

Answer 1

I believe that what you wanted is {some_parameter}/{controller}/{action}/{id} (notice curly brackets around “some_parameter”) and in that case it shouldn’t be null or empty, I think. How do you think your end URL might look like to match the route in case when some_parameter is empty? “mysite.com//mycontroller/myaction/myid”?

Routing engine just matches patterns. If you want to handle both {some_parameter}/{controller}/{action}/{id} and {controller}/{action}/{id}, just define both routes.