MVC3 and regex route parameters

We are moving to MVC3 and we already have a complex url redirect/rewrite scheme in place.

We have [what I consider to be] complex urls that need to be decomposed to their component values.

For instance, the url http://web-current/billet-grilles/10a50164A.aspx, needs to have the 10 and the 50164 removed and passed as parameters.

The following is our existing regex:

([^/]+)/10[A|a]([0-9]+)[A|a]{0,1}.aspx[\?]*([^/]*)

I have tried this, but I run into issues:

RouteTable.Routes.MapRoute("Department", "{silo}/10[A|a}{departmentId}[A|a]开发者_StackOverflow{0,1}.aspx", new {controller = "Department", action = "Index"}, new {silo = ".*",  departmentId = "[0-9]+" })

Do you have any advice?

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I ended up using a new route object from http://iridescence.no/post/Defining-Routes-using-Regular-Expressions-in-ASPNET-MVC.aspx.

This works perfectly, thanks