473,769 Members | 2,003 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

captcha

Tem
Does anyone know where I can find a good and easy to understand sample or
tutorial of captcha validation for asp.net? (with source code not something
like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem

Jan 27 '08 #1
4 6640
"Good and easy to understand" is quite relative. Did you look at this?

http://aspnet.4guysfromrolla.com/articles/060706-1.aspx

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net
"Tem" <te*****@yahoo. comwrote in message
news:uJ******** ******@TK2MSFTN GP02.phx.gbl...
Does anyone know where I can find a good and easy to understand sample or
tutorial of captcha validation for asp.net? (with source code not
something like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem

Jan 27 '08 #2
Here's a few links, complete with code samples :

http://www.beansoftware.com/ASP.NET-...vent-Bots.aspx
http://www.eggheadcafe.com/articles/20040331.asp
http://codeeleven.blogspot.com/2007/...in-aspnet.html

Here's a couple of opinions stating that using captcha is overrated :

http://www.brains-n-brawn.com/defaul...vDir=aicaptcha
http://weblogs.asp.net/rhoward/archi...CHA_3F00_.aspx

Here's the link to the free source code/binaries for ReverseDOS :
http://www.angrypets.com/tools/rdos/download.aspx

Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
=============== =============== ========
"Tem" <te*****@yahoo. comwrote in message news:uJ******** ******@TK2MSFTN GP02.phx.gbl...
Does anyone know where I can find a good and easy to understand sample or tutorial of captcha validation for asp.net?
(with source code not something like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem

Jan 27 '08 #3
Hi

There is also:
http://www.codeproject.com/KB/aspnet...spx?print=true
http://www.codeproject.com/KB/custom...haControl.aspx

--

HTH

Éric Moreau, MCSD, Visual Developer - Visual Basic MVP
Conseiller Principal / Senior Consultant
Moer inc. (http://www.emoreau.com)
Membre du réseau .NET Expertise (www.dotnet-expertise.com)

"Tem" <te*****@yahoo. comwrote in message
news:uJ******** ******@TK2MSFTN GP02.phx.gbl...
Does anyone know where I can find a good and easy to understand sample or
tutorial of captcha validation for asp.net? (with source code not
something like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem
Jan 27 '08 #4
Search on "ASP.NET Captcha control" and include the quotes.
An excellent Captcha that won't strain your eyes or frustrate you is simply
to ask the user to enter the sum of two displayed numbers. Even simpler, Jeff
Attwood displays a graphic with the word "Orange" which never changes, and
states that it is near 100% effective.
-- Peter
Site: http://www.eggheadcafe.com
UnBlog: http://petesbloggerama.blogspot.com
MetaFinder: http://www.blogmetafinder.com
"Tem" wrote:
Does anyone know where I can find a good and easy to understand sample or
tutorial of captcha validation for asp.net? (with source code not something
like recaptcha)
the ones I found are too complicated to implement

thanks,
Tem

Jan 28 '08 #5

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
2793
by: Krishna Kumar | last post by:
Hai all, I am doing a project in .net and in that project I have a problem in capturing text from an image. i.e images like CAPTCHA images . which has inbuilt text with in the image.So, Can any one suggest me how to continue my work or give their valuable suggestions for capturing text in the CAPTCHA image . yours KrishnaKumar
12
3387
by: Francois Bonzon | last post by:
After a Google search, I see that quite a few CAPTCHA implementations in PHP are available. I'd like one that's not (easily) OCR-able, or otherwise crackable. Open source or commercial is not important. Any recommendations, or experience with a specific one to share? I get a lot of SPAM entries on a guestbook, and want to protect it. I'll require users to solve a CAPTCHA before their entry is accepted. I might use CAPTCHAs to protect...
12
10238
by: pittendrigh | last post by:
Let's say we're trying to keep blog and forum spammers out of our site--we're not trying to protect fort knox. 1) Step one is a one-time-only step. We create six different css files that define the same six color names differently, but each such css file assigns red to one and only one of those same six color names, and then store the six somewhere in the document_root.
7
10163
by: mitchell | last post by:
hi i m using IE 6.0. i want to refresh just the captcha part when the user clicks on an image. i searched for articles on it and got a fairly good understanding of it. but i m still unable to get any results. i have used Simple AJAX Code-Kit (SACK) (http://www.twilightuniverse.com/)
4
5794
by: xeiter | last post by:
Hi, I have a captcha script on my website located at /captcha.php. What it does it generates an image with the code, displays the image (gd2) and saves the value of the code in session. How do I access that code in session from my c# windows application. I have a form in my application for registering users. The application then calls to the webserver and uses regular .php page to submit user registration. It has captcha and thats why I need...
11
2438
by: Twayne | last post by:
Hi, Learning PHP code; playing with various methods of generating captcha codes: In the code below, how would I change the size of the text displayed in the captcha code? Is it even possible with this method? TIA, Twayne
4
2178
by: Jeigh | last post by:
My host has been 'upgrading' lately and its caused me a whole mess of problems. The last of which being that my CAPTCHA form no longer works. I remember to get the CAPTCHA working it took me weeks to do (this was a long time ago too), and at some point I recall editing it in a Hex editor before finally getting it to work, basically I do not have a clue what this thing needs to do to work. One day I tried my registration form (without editing...
7
1490
by: =?Utf-8?B?bWF0dCBw?= | last post by:
Steve Orr has a neat Captcha control: http://steveorr.net/articles/CAPTCHASP.aspx but aside from "dragging the control onto your toolbox.." Does anyone have any installation instructions: e.g. aspx code, etc... ?? I could not find any..
15
4805
by: sb5309 | last post by:
When one uses CAPTCHA (form with verification code), a session is required to keep the session data. In examples that I have seen on the net, I did not see a session is closed after use. Imagine a case when someone gets to a form with CAPTCHA, a session will be started in the server; and then the person decides to jump to another site without filling the form. The session data still exists in the server. If this scenario gets repeated...
10
7856
by: jeddiki | last post by:
Hi, I have a captcha script which should pick up a background image and add some random letters to it and re-display This is the part of the form that the captcha image is part of: <span >Verification Image:</span> <span ><img src="captcha.php" id="captcha" /> <a href="#renew" onclick="javascript: document.getElementById('captcha').src = 'captcha.php?' + Math.random();">refresh</a> </span>
0
9589
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10045
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
9994
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
9863
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
6673
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5447
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
3959
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
3562
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2815
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.