Re: easiest way to check for a non-alphanumeric character?
This WebDNA talk-list message is from 2000
It keeps the original formatting.
numero = 35396
interpreted = N
texte = Brilliant!! Thanks Joe! :-)- side note -Notice that my current checker code:**** [showif [URL][loginString][/URL]^%] [text show=F]StringValueError=T[/text] [/showif][showif [URL][loginString][/URL]^/] [text show=F]StringValueError=T[/text] [/showif][showif [URL][loginString][/URL]^.] [text show=F]StringValueError=T[/text] [/showif]*****does in fact catch every character you suggested it would not catch. (except for the underscore ((and a dash - which you didn't mention but could have)) but actually I meant to say that I want to allow underscores and dashes as well as all alphanumeric chars.)See? When you [url]ize the formvar it changes most stuff into hexadecimal form which for most non-alphanumeric chars start with a % - which I look for ;-)I could have phrased my question like this - What chars other than:alphanumeric chars - _ / .DO NOT start with a % when wrapped in an [url] context?If someone knows the answer then I can save the small hassle of doing the elegant way you suggest.-JohnJoseph D'Andrea wrote:> At 2:21 PM 7/29/00, John Butler wrote: > >***** > > > >Do I need more? > >I.e. is this enough to check for any possible non-alphanumeric char? > > No. You're not checking for space _ , = + { } ' * blah blah blah. > And my experience with the check every bad value approach is that > it is time consuming, produces ugly code, and I invariably miss some > character or another. > > There are a couple of ways to accomplish what you want. > > One way is to create a conversion database which converts a-z, A-Z > and 0-1 to nothing. Then set a temporary text variable to the value > of the form variable. Pass the temp variable through the conversion > db above which would leave everything in the string except > alphanumerics. Then if the size of the temp variable is not zero, > they made and input error. > > ___Joe___ > ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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Brilliant!! Thanks Joe! :-)- side note -Notice that my current checker code:**** [showif [url][loginString][/URL]^%] [text show=F]StringValueError=T[/text] [/showif][showif [url][loginString][/URL]^/] [text show=F]StringValueError=T[/text] [/showif][showif [url][loginString][/URL]^.] [text show=F]StringValueError=T[/text] [/showif]*****does in fact catch every character you suggested it would not catch. (except for the underscore ((and a dash - which you didn't mention but could have)) but actually I meant to say that I want to allow underscores and dashes as well as all alphanumeric chars.)See? When you [url]ize the formvar it changes most stuff into hexadecimal form which for most non-alphanumeric chars start with a % - which I look for ;-)I could have phrased my question like this - What chars other than:alphanumeric chars - _ / .DO NOT start with a % when wrapped in an [url] context?If someone knows the answer then I can save the small hassle of doing the elegant way you suggest.-JohnJoseph D'Andrea wrote:> At 2:21 PM 7/29/00, John Butler wrote: > >***** > > > >Do I need more? > >I.e. is this enough to check for any possible non-alphanumeric char? > > No. You're not checking for space _ , = + { } ' * blah blah blah. > And my experience with the check every bad value approach is that > it is time consuming, produces ugly code, and I invariably miss some > character or another. > > There are a couple of ways to accomplish what you want. > > One way is to create a conversion database which converts a-z, A-Z > and 0-1 to nothing. Then set a temporary text variable to the value > of the form variable. Pass the temp variable through the conversion > db above which would leave everything in the string except > alphanumerics. Then if the size of the temp variable is not zero, > they made and input error. > > ___Joe___ > ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://search.smithmicro.com/
John Butler
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