know I promised that I wouldn't go into them, but one of my favorite uses of this type of thing is to tell human visitors to your web site apart from computer visitors (spiders). By generating an image with a text message, you can ask visitors to type in the text to verify that they're not a computer. Granted there are computer programs (OCR or optical character recognition programs) that can do this type of thing, but they're relatively complex to write and are pretty easily fooled by picking weird fonts or distorting the images slightly. Most of the bigger web service providers like those that provision free email accounts or free web space have already implemented something like this. For more info, check out the CAPTCHA Project. The 8 page technical report available from the site's home page makes for an interesting read if you're interested in the topic.
A professional Web site will have a standardized look across all pages. It can be difficult to maintain a standard look if you must always put the common pieces in place with every single web for you build. A Master Page defines the look and feel and standard behavior as a template for all the pages (or a group of pages) in your application. Your Web form only needs to define the unique content itself and this will plug into specified areas of the Master Page layout at runtime.
Before Asp.net invasion there were many other programming languages and technologies on which the dynamic pages were made. In this tutorial I will explain how we can migrate our classic asp application to the modern asp.net application. Most of the components that were written was in visual basic 6 which communicated with the asp application using the COM components.
Before reading this tutorial you should be familiar with ASP.NET and C# or VB.NET (examples will be provided in both C# and VB.NET).
If you don't already have Visual Studio installed on your computer you can download Visual Web Developer 2005 Express Edition freely from the Microsoft website.
To download AJAX Extension go to www.asp.net, click on "AJAX" tab at the top of the page, then click on the "Download" button, and at last click "Download ASP.NET AJAX v1.0" button. Save
You can make extensive use of expressions for referencing string resources for localization, connection strings and application settings from configuration file. Expressions are evaluated at run time when the declarative elements of the page are parsed, and the value represented by the expression is substituted for expression syntax.
Joining mailing list will entitle you
to receive occasional emails informing you of news and
updates to the site and any special offers that may be
of interest to you.