What are route constraints in ASP.NET routing?

What are route constraints in ASP.NET routing?

Route constraints are rules that specify conditions under which a route should be considered a match. They help in filtering requests based on parameters.

Can you give me an example of how to use route constraints?

Sure! For instance, you can use a constraint to ensure that a route parameter is an integer. You would define it like this: routes.MapRoute("Default", "{controller}/{action}/{id:int}");.

What happens if a route doesn't meet the constraints?

If a route doesn't meet the specified constraints, it won't be matched, and the routing engine will continue to check other routes.

Are there built-in constraints in ASP.NET?

Yes, ASP.NET provides several built-in constraints like int, bool, decimal, and even custom constraints can be created.