Set Captcha Numbers

[Joseph]

Hi,

How to use only numbers in RadCaptcha?

Thanks,
Joseph.

[Princy]

Hi Joseph,

You can set the CaptchaImage-TextChars property of the RadCaptcha to Numbers so that only numeric characters appear in the RadCaptcha Image.

Thanks,
Princy.

[Joseph]

Hi Princy,

Thanks for the reply. Is it possible to cancel the default validation mechanism and add a custom one? Is there any custom validation method to do so?

[Princy]

Hi Joseph,

The event CaptchaValidate is fired berfore the control is validated. This event allows you to execute server-side code on RadCaptcha validation, to cancel the default validation mechanism of the captcha control and to specify your own logic for validating the RadCaptcha.
Please check the sample C# code provided below.

C#:

protected void RadCaptcha1_CaptchaValidate(object sender, CaptchaValidateEventArgs e)
{
    e.CancelDefaultValidation = true; //Cancel the default validation mechanism.

    // Your logic to perform custom validation.
}

Thanks,
Princy.