How to do ASP.NET WebForms routing for asmx Web Services?

Hi experts! I'm trying to enable ASP.NET WebForms routing to an asmx Web Service.

The following returns a "Type 'myproject.myservice' does not inherit from 'System.Web.UI.Page'" error:

routes.MapPageRoute(
            "The_Route_Name_For_This_Service",
            "somethingfantastic/",
            "~/services/myservice.asmx?op=MyFunction"
        )

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How can I add paths to asmx web services to my RouteCollection?

Your help is greatly appreciated!
DrevoAsked:
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BuggyCoderCommented:
you cannot route a request to an aspx page, which is a class derived from page class which is the page's HTTPHandler to a asmx page.

By default Instance of Page is created whenever a request is made for an aspx page, however i think if you can write your own HttpModule, you can override this behaviour and have your own handler get called.
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DrevoAuthor Commented:
Thanks for your comment BuggyCoder! Though you can route requests to aspx pages. I think you're right that something needs to be overridden to route to an asmx web service. I don't know exactly how though, which leaves this question still open. Perhaps some kind of extension of IRouteHandler and/or IHttpHandler?

In the meantime I'm just checking for specific URL path patterns in Application_BeginRequest and doing a Context.RewritePath to the matched web service.
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