i am creating a registration form for that i want to implement the captcha image.can i get the source code or any reference.Thanking you
Your best bet is to use reCAPTCHA. It's free, widely used, and well documented. And by using it you'll be helping the project along digitizing old books.
They have code samples for asp.net HERE
Take a look at this article (first result of search string asp.net captcha).
Related
Assuming I'm stuck with asp.net web forms (I'd love to use MVC partial views), are there any good alternatives to asp.net AJAX 4.0 client-side templates?
In other words, is there some way to specify some html, with placeholders for data properties, to which I could then bind a JSON result. Are there any good jQuery plugins to do this?
I ask because based on the results I'm seeing from Google, this library doesn't seem to be widely used—most search results are from 2008-2010. This question seems to confirm that suspicion.
EDIT
I despise answering my own question, but this link (jQuery Templates) seems to me to be the best bet. If anyone else has any input, please post.
Definitely consider jQuery Templates. We use them quite extensively in WebForms with ScriptServices as a data provider. There is a very small learning curve.
Also check out KnockoutJS, which integrates seamlessly.
Adam, coincidentally, I am using JQuery to retrieve some server side data calling Web Services via Ajax and binding the result on the client side. On my particular case, I am only showing data in a tabular manner, so I am using the jquery datatables plugin (which is fantastic, in my opinion; the API is well documented and easy to extend if you need to).
If you need to show data differently, I think you'll need to write quite a good amount of boilerplate javascript code.
EDIT: I just saw your link reagarding Jquery Templates and looks really cool. I didn't know it existed :) Thanks!
I 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.
So, suggest me which technology used for to develop the capha control and how.
I am using asp.net platform with vb.net as the language.
You can try reCAPTCHA.
Check out this (free): http://www.codinghorror.com/blog/2004/10/an-aspnet-captcha-server-control.html
Or Telerik has a great Captcha product (not free).
BotDetect CAPTCHA is excellent. I just used it on a big project. http://captcha.biz/
There are lots of existing options you could use (as others have pointed out). But, if you want to roll your own, you might want to consider WPF/Silverlight. There are a lot tools in there to manipulate/transform letters and numbers that you could utilize.
You could apply a random (or several random) transformations to each letter/number of a randomly generated string of letters/numbers.
I'm new to Drupal, but I want to create an add-on. The add-on requires some sort of multi-page form with advanced jQuery (I already looked at the jQuery module).
The add-on requires details of the current logged in user and will also communicate with an external database.
I've been looking at tutorials concerning Module creation etc. But they mostly cover creation of simple forms, where as what I want to create is more of a plugin.
Multi page forms are a total drag. Pro Drupal Development, has a very good section on this topic, and I highly recommend that book if you are doing any Drupal development.
Online I found the following article pretty useful too (though I ultimately went with my own system).
http://www.nicklewis.org/using-chaos-tools-form-wizard-build-multistep-forms-drupal-6
There's a decent example here:
http://thedrupalblog.com/creating-multipage-form-using-forms-api
To make the most out of this, you're going to want to get pretty friendly with the Form API:
http://drupal.org/node/204270
Sadly Drupal.org seems to be missing a Drupal 6.x explanation (though plenty exist for 5.x and 4.7 oddly enough).
Multi step forms are complex by nature, but there are some methods to make it easier. I recommend that you have a look at the multistep form tools offered by the Ctools module. This blog post by Nick Lewis explains how you can use it.
I think you should think twice before going with javascript/jQuery to create your forms. Javascript is a great way to improve the user interface, but it can be easily manipulated because it's client side technology. You shouldn't rely on javascript alone for things like input validation, temporary storage of form values and controlling the flow between different steps of the form.
I feel odd saying this, but I don't think you want to use the Drupal Forms API.
The Forms API provides a lot of security features (unique token, rebuilds form after submit to compare to ensure correct form is processed, etc.) and allows other modules to modify your forms, but I think a lot of those features will get in the way of your jEditable form. Multi-page forms are not that challenging using the Forms API, but jEditable elements will be.
Your module could simply add a menu item with a page callback function that puts together your jEditable form for you. That is about as close to the world of a 'normal PHP' script as Drupal will let you get.
please introduce some form maker(page maker) for asp.net.
like Iron speed.
that enable us to generate form or user control from database tables.
thanks all.
I suggest also this one
http://www.hkvstore.com/aspnetmaker/
Try Asp.Net Dynamic Data
There are tutorial videos at the link provided.
It's quick, simple, powerful, and easy to customize once you learn how it works. (And provided you understand ASP.NET in general.
And it's free.
Assuming the following:
You have some content currently being displayed in an ASP.NET HTML table.
You want to use Silverlight for a better user experience.
It is important that the information be indexed in Google, et al.
What do you do? I know that XAP (Silverlight executables) contain XAML which could theoretically be indexed. But will Google do this? And if so, when? And what if the data being served up is not in the XAML (perhaps it is stored as a resource)?
My first thought is to try to detect search engines and serve up the HTML table. But my limited understanding of SEO makes me wonder whether Google would frown on this practice and possibly black-list the site. And I am not sure how reliable it is to try to detect the search engines anyway.
Is there a definitive correct way to do this which won't get you in trouble with Google?
Search engine optmization is possible in silver light go thru the following link
SEO
This is an excellent article with a slide-show on 'Search Engine Friendly Silverlight Applications' from a Software Architect at Microsoft :
http://www.nikhilk.net/Entry.aspx?id=200
This MSDN blog post on 'Simple Silverlight SEO with ASP.Net and XSLT' will also be of interest :
http://blogs.msdn.com/synergist/archive/2007/10/03/simple-silverlight-seo-with-asp-net-and-xslt.aspx
Progressive Enhancement. Use the basic HTML table. Use JavaScript to replace the table with the richer interface.
Since Silverlight is still verey limited in browser/OS support, I'd advise to steer clear of it for public webpages, or at least provider traditional alternatives as well, which will then be indexable by search engines.