index > Regular Expressions > Regular expression for email address and display name.

Regular expression for email address and display name.

I need a regular expression to valid the string below:

Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<oamgk@test.co.uk>;Rachel Baileys<sagle@test.net>

The format is: DisplayName<EmailAddress>;DisplayName<EmailAddress>;DisplayName<EmailAddress>

Can anyone help?

Thanks in advance!

waterding

The following works for your example...

            string pattern = @"^((?<displayname>[\w\s'-]+)(?<address><[\w]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$";
            string test = @"Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<oamgk@test.co.uk>;Rachel Baileys<sagle@test.net>";
            Console.WriteLine("{0}", Regex.IsMatch(test, pattern));

Les Potter, Xalnix Corporation, Yet Another C# Blog

xalnix

The following works for your example...

            string
 pattern = @"^((?<displayname>[\w\s'-]+)(?<address><[\w]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$"
;
            string
 test = @"Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<oamgk@test.co.uk>;Rachel Baileys<sagle@test.net>"
;
            Console.WriteLine("{0}"
, Regex.IsMatch(test, pattern));

Les Potter, Xalnix Corporation, Yet Another C# Blog

Thanks, xalnix.

How can I extract the DisplayName and Email?

waterding

This is a little convoluted, but I believe it is the accepted way in such a situation...

            string pattern = @"^((?<displayname>[\w\s'-]+)(?<address><[\w]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$";
            string test = @"Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<oamgk@test.co.uk>;Rachel Baileys<sagle@test.net>";
            if(Regex.IsMatch(test, pattern))
            {
                Match mx = Regex.Match(test,pattern);
                for(int idx=0; idx < mx.Groups["displayname"].Captures.Count; ++idx)
                {
                    Console.WriteLine("DisplayName: {0}, Email: {1}",
                        mx.Groups["displayname"].Captures[idx].Value,
                        mx.Groups["address"].Captures[idx].Value);
                }
            }

Les Potter, Xalnix Corporation, Yet Another C# Blog

xalnix

This is a little convoluted, but I believe it is the accepted way in such a situation...

            string
 pattern = @"^((?<displayname>[\w\s'-]+)(?<address><[\w]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$"
;

            string
 test = @"Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<oamgk@test.co.uk>;Rachel Baileys<sagle@test.net>"
;

            if
(Regex.IsMatch(test, pattern))

            {

                Match mx = Regex.Match(test,pattern);

                for
(int
 idx=0; idx < mx.Groups["displayname"
].Captures.Count; ++idx)

                {

                    Console.WriteLine("DisplayName: {0}, Email: {1}"
,

                        mx.Groups["displayname"
].Captures[idx].Value,

                        mx.Groups["address"
].Captures[idx].Value);

                }

            }

Les Potter, Xalnix Corporation, Yet Another C# Blog

Thanks xalnix.

I just found out that the Regx doesn't work for this string:

abc<abc.def@test.com>

Can you help?

waterding

Try modifying the pattern to the following. The only difference is I added '.' to the characters allowed to the left of the '@'.

@"^((?<displayname>[\w\s'-]+)(?<address><[\w\.]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$"

Les Potter, Xalnix Corporation, Yet Another C# Blog

xalnix

string pattern = @"^((?<displayname>[\w\s'-]+)(?<address><[\w\.]+@([\w\d-]+\.)+[\w]{2,4}>)(\;|$))+$";
if (!Regex.IsMatch(txtFromEmail.Text, pattern))
{
cvFromEmailInvalid.IsValid = false;
isValid = false;
}

I am using this regx to relidate. However, it doesn't work for this: Richard<abc@test.com>;Leo Mark<gsg@get.com>;O'Neil Amy<o'neil.amy@test.co.uk>;Bailes O'Neil<Bailes.O'Neil@test.net>

waterding

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