Include validation for email address so that the email has @gmail.com extension

Question

1.00/5 (1 vote)

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Can anyone help me to do this task. I have got a textbox that accept the email address. We need to validate the email address such that it has only "@gmail.com " extension. If the email address is not valid I need to make the div with red background and also display an error message that the email is not valid.

HTML

<div class="detailsRow" id="VAREmail">
           <div class="detailsLabel">
               @Html.LabelFor(m => m.VAREmail, Strings.VAREmail)
           </div>
           @Html.TextBoxFor(m => m.VAREmail, new { style = "width:50%" })
           @Html.ValidationMessageFor(m => m.VAREmail)
       </div>

What I have tried:

I tried using a javascript but I couldn't make it

var email = document.getElementById("VAREmail").next().value;
var filter = ^(?i)[A-Z0-9._%+-]+@(gmail.com);
if(!filter.test(email))
{
document.getElementById("VAREmail").style.backgroundColor = "maroon";
}

Posted 13-May-16 4:04am

user 3008

Updated 13-May-16 9:07am

v2

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3 solutions

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OriginalGriff · Answer 1 · 2016-05-13T04:10:00

Solution 1

Try a regex:

^[\w!#$%&'*+-/=?^_`{|}~]{1,64}@gmail.com$

Should do it.

Posted 13-May-16 4:10am

OriginalGriff

Richard Deeming · Answer 2 · 2016-05-13T04:12:00

Solution 2

Add the RegularExpression attribute[^] to the property in your model:

C#

[RegularExpression(@"^[^@]+@gmail\.com$", ErrorMessage = "Please enter a GMail address.")]
public string VAREmail { get; set; }

Alternatively, don't let the user type the domain at all:

C#

[RegularExpression(@"^[^@]+$", ErrorMessage = "Please enter a GMail account.")]
public string VAREmail { get; set; }

public string RealEmail
{
    get { return string.IsNullOrWhiteSpace(VAREmail) ? string.Empty : VAREmail + "@gmail.com"; }
}

HTML

<div class="input-group">
    @Html.TextBoxFor(m => m.VAREmail)
    <div class="input-group-addon">@gmail.com</div>
</div>

Posted 13-May-16 4:12am

Richard Deeming

Comments

user 3008 13-May-16 10:20am

Thanks for your reply. If I code as you said I am getting the error message but I couldn't include a styling if the validation returns false.

Richard Deeming 13-May-16 10:25am

You'll need to override the default "highlight" and "unhighlight" methods for the jQuery Validation[^] script.

For Bootstrap, I tend to use:

$.validator.setDefaults({
   highlight: function (element, errorClass, validClass) {
      $(element).closest('.form-group').removeClass(validClass).addClass('has-error');
   },
   unhighlight: function (element, errorClass, validClass) {
      $(element).closest('.form-group').removeClass('has-error').addClass(validClass);
   }
});

Patrice T · Answer 3 · 2016-05-13T09:07:00

Solution 3

Here is an online tool to check RegEx. It display your RegEx expression visually in a nice graph, and allow you to text some expressions for matching.

Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]

Posted 13-May-16 9:07am

Patrice T