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Maxlength & Regular Expressions for text boxes

Posted By:      Posted Date: September 21, 2010    Points: 0   Category :ASP.Net

So over here, I'd asked about Regex and methods of limiting user input in text boxes, and got some very good answers, but I've hit another snag.

1) Using "Maxlength=XXXX" works great for single-line text boxes, but doesn't prevent the user entering too much text in multi-line text boxes. I wouldn't mind that, but it also doesn't trigger an error to display to the user, it just doesn't let the page submit.

2) So I've been using Regular Expressions (i.e, .{0,50} ) to pop up an error message when the user enters too much text. However, there's again a problem with multi-line text boxes. Using the dot for the validation expression does not allow the user to enter line breaks. Using \r\n will allow line breaks, but that's it. I keep looking at RegEx references online, and I can't find a way to allow both. Any combination or \r\n and . that I've tried has resulted in the expression allowing only line breaks.

So my question is this - what Regular Expression should I use to allow text (any character) with line breaks? Or, is there a better/simpler way to handle this?

 Thanks a million!


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