SharePoint 2007 (MOSS/WSS) - Custom CAPTCHA (Antispam) Field

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I saw a nice post in CodeProject (https://www.codeproject.com/KB/aspnet/CaptchaImage.aspx) regarding CAPTCHA image control. I used the same code to create a Custom Field that will work like a CAPTCHA field for SharePoint. I tested it with Custom List and Blog Post suceessfully. You need to enable the session in the Web.Config file using enableSessionState="true" as it depends heavily on session. Here is how it looks like:

captcha 

Here is the screenshot of the Solution Explorer:

soexplr

You can download the WSP file and the project in a zip file from here.

CaptchaField.zip

Comments

  • Anonymous
    December 11, 2008
    PingBack from http://stevepietrek.com/2008/12/11/links-12112008/

  • Anonymous
    January 04, 2009
    Dezember HotFix Update The December cumulative update for WSS V3 and MOSS 2007 WSS Download http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=960010&kbln=en-us

  • Anonymous
    January 05, 2009
    Dezember HotFix Update The December cumulative update for WSS V3 and MOSS 2007 WSS Download http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=960010&kbln=en-us

  • Anonymous
    January 05, 2009
    Dezember HotFix Update The December cumulative update for WSS V3 and MOSS 2007 WSS Download http://support

  • Anonymous
    January 08, 2009
    The comment has been removed

  • Anonymous
    January 08, 2009
    The comment has been removed

  • Anonymous
    March 12, 2009
    thanks for the nice solution. Question, is this something that could be used for a custom login application page in WSS 3.0 as well? thanks!

  • Anonymous
    March 18, 2009
    I Supposed your solution assemble Sharepoint Form Validation http://www.sharepointboost.com/formvalidation.html, but their focus is different. Good blog, though.

  • Anonymous
    May 05, 2009
    Are there any security implications in implementing this?  Does this solution open any other vulnerabilities(i.e. through the GAC)?

  • Anonymous
    May 05, 2009
    Anthony, This is just an sample and never tested for production. You need to modify and test it suitably if you want to use it in production.

  • Anonymous
    May 14, 2009
    SharePoint Create your own customized usage report solution step by step SharePoint WebPart Property

  • Anonymous
    June 01, 2009
    Como cada mes, desde hace ya un par de años, aquí os dejo el clásico recopilatorio

  • Anonymous
    June 23, 2009
    The image is not showed in the form, I set the enableSessionState="true", but the form only shows an "X", could you pls help me?

  • Anonymous
    November 03, 2009
    After deploying this solution, all I get is this error... Failed to determine definition for Feature with ID 'f3808a5f-354c-4216-bf9e-dcfa8c44f0fc'.  Skipping this feature for element querying consideration.   Failed to determine definition for Feature with ID 'f3808a5f-354c-4216-bf9e-dcfa8c44f0fc'.  Skipping this feature for element querying consideration.   Exception Type: System.NullReferenceException  Exception Message: Object reference not set to an instance of an object. any ideas anyone

  • Anonymous
    October 04, 2010
    @Rob Ashcroft: There is no feature included within the WSP. The feature ID specified relates to the RoleManagement feature within MOSS and is likely unrelated. @pranab: I have deployed the solution and am receiving a blank image. Looking at the source I notice that GenerateImage.aspx contains no data to render the CAPTCHA image. Are you able to provide the required rendering for this??

  • Anonymous
    October 04, 2010
    @pranab : Have you managed to get the supplied code working? I'm wondering if there's a missing dependency at my end. I have enabled SessionState for the destination web app through Central Administration and confirmed the setting in the web.config under httpmodules section. Is this correct, or are you referring to the <pages> enableSessionState setting? Any advice appreciated as I would dearly love to see this in action.