.NET news » Ajax

When consuming things like long web services or RSS feeds from external web sources, it might be nice to load all of the important parts on the page first and then load the slower loading part(s) later. This example will demonstrate how to load multiple blocks of RSS headlines after the main body of the page has had a chance to load. While the page is loading, placeholders are displayed to indicate that additional content is coming. After the page loads, the content for the placeholders is retrieved and displayed asynchronously.

Oftentimes, there can be a need to load something on a page that may take significantly longer to load than the rest of the page. In some cases, you can use caching to help with this issue, but it may not always be possible or be the only option. If something is going to take longer to load than normal, it is important to display some kind of visual feedback to the user so that they know to wait while something is happening. Retrieving information from a remote server, displaying large sets of data, and photo galleries are just a few examples where delaying the loading of specific content areas would be useful.

This is an article on how to use Rating control from AjaxControlToolkit and create CSS and images to display it as a gauge or thermometer. It is useful for those who need to show ratings in ASP.NET more graphically.

In the current sample of the project, I used the AJAX development approach to dynamically display and interact with the information presented. I decided to couple the JavaScript Grid and Web Service from my previous articles. This article shows how it's simple to use my JavaScript Grid along with AJAX on client side. Since the client and server code were done, all that I needed to do is to couple it into one application. It is pretty simple to introduce the Grid into a web application..

Don't want to use the new Microsoft AJAX quite yet? There are other plenty of other good (and easy) alternatives! This article will demonstrate how to use a popular JavaScript library (jQuery) to add AJAX capabilities to your application with a minimal amount of code.

When users of any computer application start a potentially lengthy operation, best practices dictate that the user interface should be updated to indicate that work is in progress and that results may not be available for a while. This is easy to accomplish in a desktop application, but it can be rather difficult in a Web scenario. In Web applications, displaying text such as "Please wait" just before an operation begins is easy, but if you want to provide some useful feedback, such as the estimated time to completion or the percentage of work finished, it’s a bit more difficult to accomplish. This is because most lengthy tasks in Web apps execute on the server, and there are no built-in mechanisms for pushing state information to the client.

In this month’s column, I build a server and client ASP.NET AJAX infrastructure to start and control a potentially lengthy server-side task.

Asynchronous JavaScript and XML are now the needed for new generation websites. This article describes how to implement ASP.NET Ajax into applications.

This is a Panel that automatically shows an alert if the user tries to leave the page before saving the data.

This is a custom webcontrol that shows the progress of long sequential tasks using AJAX to refresh the page

One of the excellent features of ASP.net Ajax Extension 1.0 is the UpdatePanel control. The UpdatePanel control enable partial-page rendering in an ASP.NET Web page asynchronously. The contents of UpdatePanel control will automatically update when a postback event invoked. This control does work same as MagicAjax.net panel control. The UpdateProgress control is very useful when working with UpdatePanel control. With an UpdateProgress control, you can show the status during the partial-page rendering of an UpdatePanel.

With this Control you can register some servermethods and call them from clientside, submitting and returning string data.