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Editorial Team
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Asked: 2026-05-28T22:52:49+00:00

Is there an inbuilt ASP.Net or MVC3 function that generates a valid CSS class

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Is there an inbuilt ASP.Net or MVC3 function that generates a valid CSS class given a string. Tagbuilder seems to have one AddCssClass. However just wondering if there is anything else that takes a string and converts it to valid CSS Class name by converting invalid characters to valid ones?

As an example say I have a string “Test. Bad Class Name”

I was wondering if there was a helper function to convert this to “Test__Bad Class_Name” or some such thing.

MVC doesn’t seem to generate bad IDs etc so I just wondered if it had something that did this so I was being consistent. I just thought it would be a common requirement.

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1 Answer

  1. Editorial Team
    string className = Regex.Replace(myInput, @"[^a-zA-Z_\-]+", "_");

    I know this pattern is overly zealous and replaces characters it shouldn’t, like numbers, but it will give you a one-way function for generating valid css class names.

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