Regular Expression validation - support case insensitive pattern

Jonathan McComb

created 15 years ago

The ASPxTextBox regular expression validator seems to be working incorrectly. Or maybe it's just a difference between JS and .NET.
Using the following regular expression in Expresso I can match the email address below, but it doesn't match in a web page.
Regex pattern: [A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4}
Email address: strange-email-@hotmail.com
Note the hyphen right before the @ symbol.
I'm expecting the regex to ignore case because if I leave out the last hyphen the validation succeeds, so case seems to be ignored.

WebForm1.aspx

Comments (3)

DevExpress Support Team 15 years ago

Hi Jonathan,

Thank you for the report. I see the problem, and it appears because we create the RegEx object on the client side using the following code:

JavaScript
EvaluateIsValid: function(value) {  
    if (value == null)  
        return true;  
    var strValue = value.toString();  
    if (_aspxTrim(strValue).length == 0)  
        return true;  
    var regEx = new RegExp(this.pattern);  
    var matches = regEx.exec(strValue);  
    return matches != null && strValue == matches[0];  
}

It is necessary to use another code to support case-insensitive regular expressions. I have exported your bug report to a suggestion and we will try to implement it in the future.
Thanks,
Plato

Jonathan McComb 15 years ago

OK, but ignoring case is just one part of the issue.
Why is it that the regex pattern below succeeds with email address A, but fails with email address B?
Pattern: [A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4}
A: strange-email@hotmail.com
B: strange-email-@hotmail.com

DevExpress Support Team 15 years ago

Hi Jontathan,
I've moved your question to the Regular Expression validation problem thread, as posting several questions in the same thread violates the Support Center concepts. Please create a new ticket in the Support Center every time you wish to ask a new question.
Thanks,
Plato

Regular Expression validation - support case insensitive pattern

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