validating multiple emails from a textbox

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Hi,

I have a textbox 1)CC . In these I have to validate emails more than one separated by comma or semicolon .Can any one know how to validate using regular expression ?
Please let me know .

Thanking you.
Mohd Wasif

Posted 12-Jan-11 18:03pm

Mohd Wasif

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Mohd Wasif 13-Jan-11 0:45am

Questions is solved thanks a lot

2 solutions

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Hiren solanki · Answer 1 · 2011-01-12T18:29:00

Solution 1

I don't know about specific Regex to achieve to your solution but yeah I can show you a way.

C#

string listofEmail = "abc@xyz.com,bbc@co.uk";
//Count total no of Email in the list
        int totalEmail = listofEmail.Split(',').Count();
        Regex regex = new Regex(@"[A-Za-z0-9._%-]+@[a-zA-Z0-9.-]+\.[A-Za-z]{2,4}");
        int regexMatch = regex.Matches(listofEmail).Count;
//Count no of email with which regex matches
        if (totalEmail == regexMatch)
        {
            //Emails are correctly formatted
        }
        else
        {
            //Raise error on one or more email is incorrect in the list
        }

Posted 12-Jan-11 18:29pm

Hiren solanki

Comments

Ankur^\m/ 13-Jan-11 0:35am

Wouldn't it be good to first validate it on the client side and alert in case it is not correct?

The regular expression will be same for both client side as well as server side.

Hiren solanki 13-Jan-11 0:37am

Yes he can do it accordingly too. This is just a way. thanks ankur for inputs.

Mohd Wasif 13-Jan-11 0:44am

Thanks a lot called this code on blur of textbox
& it's working

Member 8159776 11-Jun-12 8:43am

what is Regex here? is it a class or some namespace???

Hiren solanki 11-Jun-12 8:47am

it's a .Net framework class.

Achu kuttan · Answer 2 · 2012-08-27T00:21:00

public bool isMultipleEmail(string strEmail)
{
string[] eid = strEmail.Split(',');
for (int i = 0; i < eid.Length; i++)
{
string strRegex = @"^([a-zA-Z0-9_\-\.]+)@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3}[ ]*)$";
Regex re = new Regex(strRegex);
if (!(re.IsMatch(eid[i].ToString())))
{
return (false);
}

}
return (true);
}

strEmail=textbox.text;