JSON is another markup language to define data. This free, open-source software is a wrapper around JavaScript. The Ajax Control Toolkit is a suite of controls created by Microsoft that is integrated into Visual Studio and can be dragged and dropped onto web forms just like html and server controls.
These controls are intended to be used for Ajax callbacks. However, they can also be used as normal client and or server controls. For example, Asp. Net does not come with the Tabs controls. However, the Ajax Control Toolkit does. The Tab control can postback to the server just like server controls.
Ajax should be used anywhere in a web application where small amounts of information could be saved or retrieved from the server without posting back the entire pages. A good example of this is data validation on save actions. Another example would be to change the values in a drop down list-box based on other inputs, such as state and college list boxes.
I tested it by sending mail to the account, and it worked. But it was absolutely pointless. There were better mail checkers available five years ago, and I didn't have to have Firefox or IE running to use them. When one of my coworkers saw it she said "What's it do?
Why Ajax? If the only reason you're building the application in Ajax is because "Ajax is cool" or "my boss told me to use Ajax," then you should seriously evaluate your technology choice. When you're building any Web application you should be thinking of your customers first. What do they need this application to do? What will make it easier to use? Why Not Something Else? It can be very tempting to use Ajax simply because you can.
On one site that my team was working on, there was a tabbed section of the page. All the content was stored in XML in a database and when you clicked on the tabs, Ajax was used to rebuild the page with the new tab data from the XML. This seemed like a good use of Ajax, until you start thinking of some of the issues with it:. The thing that was interesting, is that this Web site had similar pages in the past that didn't use Ajax.
They delivered the content either with hidden divs or separate HTML pages. There was no reason to use Ajax other than that Ajax was cool, and our boss had suggested we look for places to use it.
If you're going to put up an Ajax application, or just something Ajax-like on your Web site, first determine if the data you're accessing changes. The point of the asynchronous request is that it makes requests to the server for information that has changed faster - because it's happening while the reader is doing something else.
Then when they click a link or button or after a set amount of time - whatever your distinction is the data shows up right away. If your content or data never changes, then you shouldn't use Ajax to access it. If your content or data only rarely changes, then you probably shouldn't use Ajax to access it. Talk to your boss or marketing department to find out why they want to use Ajax on the Web site.
Once you understand the reasons for why they want it, you can then work on finding a suitable application for it.
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