ASP.NET compare validator for matching 2 email addresses

Question

I want to validate 2 fields using compare validator 1)Email address (required field - used required field validator) 2)Confirm email address

If I enter abc@abc.com in email address AND abc@abc.com in confirm email address, it will work fine. But when I add space after the email address in one of the textbox, it will say that both emails do not match which is not desirable. How to solve this ? It would be helpful for the user if I would be able to notify to the user that the space is not allowed in email address.

score 2 · Accepted Answer · edited May 23 '17 at 12:12

Well, if a user adds a space the emails do not match so the error message is correct. If you want to add another validation for allowed characters you could use a RegularExpressionValidator on each field. Here's an example with this regex:

<asp:RegularExpressionValidator 
     id="RegValid" 
     ControlToValidate="txtEmail" 
     ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
     ErrorMessage="Invalid email address"
     runat="server" >
</asp: RegularExpressionValidator>

Looks like you need more complex validations so you could probably replace everything with a custom validator and test everything. Markup:

<asp:CustomValidator runat="server" OnServerValidate="EmailValidate" Display="Dynamic" ControlToValidate="txtEmail2" ID="vldEmail"></asp:CustomValidator>

Code behind:

protected void EmailValidate(object source, ServerValidateEventArgs args)
{
    if(txtEmail1.Text != txtEmail2.Text) {
        args.IsValid = False
        vldEmail.ErrorMessage = "Emails are different"
    }else {
        //for each condition that fails set IsValid to false and choose the error message:
        args.IsValid = False
        vldEmail.ErrorMessage = "..."
    }
}

yes I agree with that, in this case I give "Invalid email address" as the error message, but I want to give "No Space allowed" when the space is entered by the user and for all other case "Invalid Email address". Any solution? — Warrior, Apr 24 '13 at 14:48
@Warrior You could ad another validator with `ValidationExpression="[^\s]+"` — nmat, Apr 24 '13 at 14:53
yeah, the trouble I am facing with that is 2 error messages are getting displayed — Warrior, Apr 24 '13 at 15:02
@Warrior maybe a custom validator is simpler in this case. see my updated anwer — nmat, Apr 24 '13 at 15:14

score 0 · Answer 2 · edited Oct 05 '18 at 07:37

0

regex = '^(?=.*[A-Za-z0-9])[\S]*$'

Source

tried it myself works fine :)

edited Oct 05 '18 at 07:37

Druid

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answered Apr 24 '13 at 14:55

DiederikEEn

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ASP.NET compare validator for matching 2 email addresses

2 Answers2