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BOOK: Beginning ASP.NET 4 : in C# and VB
This is the forum to discuss the Wrox book Beginning ASP.NET 4: in C# and VB by Imar Spaanjaars; ISBN: 9780470502211
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Old May 10th, 2013, 11:09 AM
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Default Regular Expression Validator - odd case?

I'm using the regular expression validator (p. 306) to guard against a text box entry that is too long. The regular expression I'm using is "^.{1,20}$". This works quite well normally. However if I enter more than 20 characters in a text box AND the text in the textbox contains one or more carriage return characters (\n) the following occurs:
1. I obtain the expected notice that the expression is too long.
2. I shorten the expression to 20 or less characters and the validator continues to show that the expression is too long until I have erased all of the carriage return characters.

I have found jQuery expressions that can replace the carriage return characters with " " but I need to retain them and would like the length test to work even with the carriage return characters present. Is that possible?
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Old May 11th, 2013, 06:15 AM
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Hi there,

White space is treated differently which causes the behavior you're describing. Does one of the regular expressions from this page work for you: http://forums.asp.net/t/1689377.aspx/1 ?

Imar Spaanjaars
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
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