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Editorial Team
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Asked: 2026-05-25T23:31:47+00:00

I am trying to write a regular expression for ASP.NET MapPageRoute that matches a

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I am trying to write a regular expression for ASP.NET MapPageRoute that matches a specific type of path.

I do not want to match anything with a file extension so I used this regex ^[^.]*$ which worked fine except it also picked up if the default document was requested. I do not want it to pick up the default document so I have been trying to change it to require at least one character. I tried adding .{1,} or .+ to the beginning of the working regex but it stopped working alltogether.

routes.MapPageRoute("content", "{*contentpath}", "~/Content.aspx", true, new RouteValueDictionary { }, new RouteValueDictionary { { "contentpath", @"^[^.]*$" } });

How can I change my regex to accomplish this?

Unfortunately my brain does not seem capable of learning regular expressions properly.

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1 Answer

  1. Editorial Team

    You want to change your * quantifier to +. * matches zero or more times, whereas + matches one or more. So, what you are asking for is this:

    ^[^.]+$

    The regex is accomplishing this: “At the beginning of the string, match all characters that are not ., at least one time, up to the end of the string.”

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