Identify specified text using c#

Question

Example text : "jhon's email address is jhon@gmail.com"

I got an error when identifying jhon's email address from regex.I'm new for this regex so like to have your valuable answers .Thanks in advance Expected result : jhon@gmail.com

score 3 · Accepted Answer · edited May 23 '17 at 10:30

3

EmailRegex shares the regex for an email address in multiple programming languages. Here are two examples:

Java:

/^[-a-z0-9~!$%^&*_=+}{\'?]+(\.[-a-z0-9~!$%^&*_=+}{\'?]+)*@([a-z0-9_][-a-z0-9_]*(\.[-a-z0-9_]+)*\.(aero|arpa|biz|com|coop|edu|gov|info|int|mil|museum|name|net|org|pro|travel|mobi|[a-z][a-z])|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(:[0-9]{1,5})?$/i

C#:

[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?

To use the regex, look at the C# and Java documentation or an Java example / C# example

edited May 23 '17 at 10:30

Community

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answered Jun 25 '16 at 15:40

Fruchtzwerg

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Yes .Thats for the validation purpose...so how can i grab email with using above expression tags – Isuru Lakshan Jun 25 '16 at 15:47
Look at the linked examples how to use it – Fruchtzwerg Jun 25 '16 at 15:49

score 0 · Answer 2 · answered Jun 25 '16 at 18:08

Assuming that your email is separated by white spaces and has '@' in the middle

    public static void Main()
{
    string text = "There is an email@email.com address in this string";
    int indexOfAt = text.IndexOf('@');
    int end = text.IndexOf(' ', indexOfAt);
    int start = text.LastIndexOf(' ', indexOfAt)+1;
    string email = text.Substring(start, end - start);
    Console.WriteLine(email);
}

score 0 · Answer 3 · answered Jun 26 '16 at 05:07

In Java, you would use something like this to find all of the email addresses in a given piece of text:

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class EmailAddressMatcher {
    public static void main(String[] args) {
        String text = "jhon's email address is jhon@gmail.com";

        Pattern pattern = Pattern.compile("([a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)", Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(text);

        while (matcher.find()) {
            System.out.println("found: " + matcher.group(1));
        }
    }
}

If you want to capture the matched email addresses, simply do that in the while (matcher.find()) loop. Each matcher.group(1) is an email address found in the text.

Identify specified text using c#

3 Answers3