A potential CAPTCHA Comment Spam Solution for dasBlog (and others) with no recompile or code changes
I took Jeff Atwood's CAPTCHA example and added a new event called "UserValidationEvent"
Public Event UserValidationEvent As EventHandler
Then I raise the event at the VERY end of ValidateCaptcha I raise it:
RaiseEvent UserValidationEvent(Me, New EventArgs)
I made it a separate event because I want the CaptchaControl to integrate with my blogging software WITHOUT any code on the server side. I didn't want to have to recompile dasBlog or check anything in the Page_Load.
I made the appropriate web.config changes as per Jeff's instructions, and I added the control to the CommentViewBox.ascx and put this code at the top:
<%@ Register TagPrefix="cc1" Namespace="WebControlCaptcha" Assembly="WebControlCaptcha" %>
<script Language="C#" Runat="Server">
protected void Foo(object sender, System.EventArgs e)
if (Page.IsPostBack == true && CaptchaControl1.UserValidated == false)
protected void Page_Load(object sender, System.EventArgs e)
//Ya, ya, I know I could have hooked this event up a number of ways
// including AutoEventWireUp but I like this fine, and it feels
// more explicit to moi.
CaptchaControl1.UserValidationEvent += new EventHandler(Foo);
There are a few Font issues to work out...he has it setup with a number of "no-no" fonts, while I'd prefer a list of "allowed" fonts.