There are a lot of question on stack overflow possibly for regular expression for email. I assume I will not get taged as duplicate question...:)
Currently I am using regular expression for email address:
\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*
This works fine with following:
xyz#gmail.com
What I want to allowed here user can give space at begining or at ending and possibly both for instance: " nihantanu#gmail.com " I want to pass it by regular expression Currently it's giving Invalid I believe it should be.
What I tried ^[ \t]+|[ \t]+$ + \w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*
But It's not working I am not more familiar with how to write regular expression. Currently I m trying to learn from Here http://www.regular-expressions.info/examples.html.
Try \s*\w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)*\s*.
Related
I am using the RegEx "^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*#[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+[.])*(\.[a-zA-Z]{2,17})$"to validate Email but my lead want to validate as per the Microsoft standard. SO i need to follow
http://msdn.microsoft.com/en-us/library/01escwtf(v=vs.100).aspx
In that everything working fine as per the standard but still i am facing the issues with
Valid: js#internal#proseware.com
Valid: j_9#[129.126.118.1]
the above mentioned mail ID is still returning as invalid. I tried using the regex used in that page
^(?("")(""[^""]+?""#)|(([0-9a-z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-z])#))(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-z][-\w]*[0-9a-z]*\.)+[a-z0-9]{2,17}))$
but i am getting the error in the server page. Though I pasted the expression inside the validation Expression it can't able to accept the characters.
Note : am using ASP.Net validators for validating the email.
Description
To match both of those email addresses in your sample text, I think I would rewrite your expression like this:
[A-Z0-9._%#+-]+#(?:[A-Z0-9.-]+\.[A-Z]{2,4}|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\])
If you're looking to use this to validate a string which may contain only an email then you can add the start/end of string anchors ^ and $.
Example
Live Demo
Sample Text
Valid: js#internal#proseware.com Valid: j_9#[129.126.118.1]
Matches
[0][0] = js#internal#proseware.com
[1][0] = j_9#[129.126.118.1]
What is the default regular expression used by asp.net create user wizard?
According to the MSDN documentation, it should be something like this:
Regular Expression: #\"(?:.{7,})(?=(.*\d){1,})(?=(.*\W){1,})
Validation Message: Your password must be 7 characters long, and contain at least one number and one special character.
However, it does not work as it does not accept something like 3edc£edc, which is actually accepted when using the default create user wizard.
Any idea about how can I get this regular expression?
The error is in the ?: in (?:.{7,})(?=(.*\d){1,})(?=(.*\W){1,}) that is "consuming" the fist seven characters or more characters. It should be ?= OR you can invert the order: (?=(.*\d){1,})(?=(.*\W){1,})(?:.{7,})
Just change the order
^(?=(.*\d))(?=(.*\W)).{7,}
I additionally removed the {1,} and anchored it to the start of the string and you don't need a group around the last part
See it here on Regexr
I am using RegularExpressionValidator control with
[http(s)?://]*([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
regular expression to validate Url. I need to allow german characters
(ä,Ä,É,é,ö,Ö,ü,Ü,ß)
in Url. What should be exact regular expression to allow these characters?
I hope you are aware that it is not easy to use regex for URL validation, because there are many valid variations of URLs. See for example this question.
First your regex has several flaws (this is only after a quick check, maybe not complete)
See here for online check on Regexr
It does not match
http://RegExr.com?2rjl6]
Why do you allow only \w and - after the first dot?
but it does match
hhhhhhppth??????ht://stackoverflow.com
You define a character group at the beginning [http(s)?://] what means match any of the characters inside (You probaly want (?:http(s)?://) and ? after wards instead of *.
To answer your question:
Create a character group with those letters and put it where you want to allow it.
[äÄÉéöÖüÜß]
Use it like this
(?:https?://)?([äÄÉéöÖüÜß\w-]+\.)+[äÄÉéöÖüÜß\w-]+(/[-äÄÉéöÖüÜß\w ./?%&=]*)?
Other hints
The - inside of a character group has to be at the start or the end or needs to be escaped.
(s)? is s?
I need a regex for the ASP.Net (4) Regex Validation control. It needs to be a RegEx validator to support other dynamic behaviors outside the scope of this post..
I was using the following, but it fails if the user enters the % sign following the number (which is a req of my spec):
^(100(?:\.0{1,2})?|0*?\.\d{1,2}|\d{1,2}(?:\.\d{1,2})?)$
I tried adding an atomic group of ^(?>%?) at the end, with no luck, after reading the excellent post
Regular expression greedy match not working as expected
Does anyone have any ideas?
Try this
^(100(?:.0{1,2})?%?|0*?.\d{1,2}%?|\d{1,2}(?:.\d{1,2})?%?)$
try this one instead:
^0*(100(\.00?)?|[0-9]?[0-9](\.[0-9][0-9]?)?)%?$
I'm using an asp.net Web Forms RegularExpressionValidator Control to validate a text field to ensure it contains a series of email addresses separated by semicolons.
What is the proper regex for this task?
I think this one will work:
^([A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4}(;|$))+
Breakdown:
[A-Za-z0-9._%+-]+#[A-Za-z0-9.-]+\.[A-Za-z]{2,4} : valid email (from http://www.regular-expressions.info/)
(;|$) : either semicolon or end of string
(...)+ : repeat all one or more times
Make sure you are using case-insensitive matching. Also, this pattern does not allow whitespace between emails or at the start or end of the string.
The 'proper' (aka RFC2822) regex is too complicated. Try something like (\S+#[a-zA-Z0-9-.]+(\s*;\s*|\s*\Z))+
Not perfect but should be there 90% (haven't tried it, so it might need some alteration)
Note: Not too sure about \Z it might be a Perl only thing. Try $ as well if it doesn't work.