c# - Problems with the following regular expression in RegularExpressionValidator control -

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I have written the following regular expression that should only match the file name or folder name that does not end in .aspx. Validation Expiration = ". * * [^ (Aspx)] $"

But if this does not work, King of Regx land, please help I do Espacks, please. Extensions like ASPX etc. would also like to be invalid. (I have learned quickly how there is some difference between regular expressions of Nets and Jascript).

Can anyone help?

[^ abc] means "a, b, or c" You do not want to have a negative character set, you should look negative: 

  validation expression = ". * * (? & Lt;! \ Aspx) $"
< Use P> RegexOptions.IgnoreCase as an option in Regex.IsMatch to make it case insensitive.

In Javascript, where there is no negative eye, you can use a less efficient version with negative lookhead: 

  validation expression = "^ ( ?: (?! \ APX $).) * $ "

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