Check if string of words contains an email address

Question

I am having a hard time forming a regex expression to check if a string of random words contains an email address. For example:

string str = "Hello, thank you for viewing my ad. Please contact me on the phone number below, or at abcd@gmail.com"

=Match

string str - "Hello, thank you for viewing my ad. Please contact me on the phone number below"

=No match

How can I check whether a string contains an email address using regex? Any help would be highly appreciated.

Related https://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address?rq=1 — Scroog1, Jul 27 '17 at 15:00

managerger · Accepted Answer · 2017-07-28T08:30:19.393

There are a lot of RegEx variations for retrieving an email address which are different by strictness. Just follow the link and choose appropriate one according to your needs. http://www.regular-expressions.info/email.html

For most of the needs the next pattern can be used

Regex pattern = new Regex(@"
                            \b                   #begin of word
                            (?<email>            #name for captured value
                                [A-Z0-9._%+-]+   #capture one or more symboles mentioned in brackets
                                @                #@ is required symbol in email per specification
                                [A-Z0-9.-]+      #capture one or more symboles mentioned in brackets
                                \.               #required dot
                                [A-Z]{2,}        #should be more then 2 symboles A-Z at the end of email
                            )
                            \b                   #end of word
                                    ", RegexOptions.IgnorePatternWhitespace | RegexOptions.IgnoreCase);

            var match = pattern.Match(input);
            if (match.Success)
            {
                var result = match.Groups["email"];
            }

Keep in mind that this pattern is not 100% reliable. It works perfect with strings like

string input = "This can be recognized as email heymail@gmail.company.com";

But in string

string input = "This can't be recognized as email hey@mail@gmail.com";

It captures "mail@gmail.com" in spite of the fact that this email is incorrect per specification.

Link only answers are not an answer. Include some relevant text from the link in your answer so that it will still be useful if the link breaks. — Tezra, Jul 27 '17 at 17:38

Check if string of words contains an email address

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