Asp net validating querystring

If you’re choosing the former option then, at the very minimum, you’ll want to have the canonical catch-all route at the end of the list: Otherwise, the request will be matched and routed to the specified controller. NET MVC sometimes gives you several ways to accomplish the same task with the result that developers wonder what’s preferable or simply what should be preferable.Maybe because of the age, but I currently tend to be more than happy if I know at least one way of doing things. Route validation is effective because it can stop an invalid request quite early in the processing.Suppose you have an application based on a standard URL scheme that fits well with the logic of the default route.

In my original use-case the application had to be able to handle URLs like …In a nutshell, the problem is: how can you ensure that gets only a well-known range of values?And if the route value is outside the allowed range of values, what’s the most appropriate way to handle it?In this particular case, there’s just one parameter to take into account: the effective value being passed which should be one of those listed on an external database or configuration file.You register a route constraint class as below: With this trick switched on, a URL that has an invalid parameter just doesn’t match up the route. What do you really need to do when you get a valid URL pattern but an invalid parameter?

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