.net - How To Implement A Captcha In WebForm
Aug 24, 2010How can I implement a CAPTCHA in my ASP.NET WebForm? It is a registration form. I am a beginner in ASP.NET.
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Web Forms :: How To Implement Captcha
Jun 13, 2012The captcha is working fine..but when we reload the page and click the verify button without entering enything..it's throwing error. Also it's throwing the error when we enter the code wrong 2 times..It's throwing the error as
Object reference not set to an instance of an object.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Line 15:protected void btnVerify_Click(object sender, EventArgs e)
Line 15: {
Line 16: Captcha1.ValidateCaptcha(txtCaptcha.Text.Trim());
Line 17:
Line 18: if (Captcha1.UserValidated)
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Feb 26, 2010I am using a server control on a single web.forms page. I have to use this control on a web.forms page since its a server control, although this is actually a MVC project. So I created a web.forms folder and put my new page in it. I then copy the example code from the signature control. I get the following error:
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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="KahunaCentralTIDRevamp.SignatureCapture.Index" %> [code]....
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Mar 18, 2011I am developing a website where I need a captcha control and I want to develop the captcha control itself, so in the future I can change its length, type, color, and have it be easy to manage as well.
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Web Forms :: How To Insert CAPTCHA
Jan 21, 2010My question to all. I have a feedback form php form. Here its code.
[Code]....
I wish to insert in this form CAPTCHA. There is for somebody have a code CAPTCHA which well works? And how to me it to insert?
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View 2 RepliesAJAX :: Captcha Not Working?
Jan 24, 2011Here is the code:
[Code]....
code behind:
[Code]....
The problem is that if the textcap changetext event is fired which is in the updatepannel then the captcha will always validate to false. If the textcap changetext event is not fired then all goes well.
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Sep 26, 2010I am working on Screen Scrapping, I was able to do, but some of the website have captcha and need to enter captcha information to proceed further
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Web Forms :: Captcha + Aspx Form
Apr 1, 2010i had created a captcha coz by reffering a blog
http://nanddeepnachan.blogspot.com/2008/06/captcha-for-sharepoint-blog.html. its successfully can run after i deploy it.
I created a feedbackForm in aspx, then add the captcha web part. the captcha appeared in feedbackForm, but the problem is the data tat i added in feedbackForm cant insert in sharepoint list...
.aspx
[Code]....
.aspx.cs
[Code]....