Set Captcha Numbers

4 posts, 2 answers
  1. Joseph
    Joseph avatar
    21 posts
    Member since:
    Mar 2013

    Posted 01 Apr 2013 Link to this post

    Hi,

    How to use only numbers in RadCaptcha?

    Thanks,
    Joseph.
  2. Answer
    Princy
    Princy avatar
    17421 posts
    Member since:
    Mar 2007

    Posted 01 Apr 2013 Link to this post

    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.
  3. Joseph
    Joseph avatar
    21 posts
    Member since:
    Mar 2013

    Posted 02 Apr 2013 Link to this post

    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?
  4. Answer
    Princy
    Princy avatar
    17421 posts
    Member since:
    Mar 2007

    Posted 02 Apr 2013 Link to this post

    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.
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