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AJAX Materials-Free Download





What are the components of the ASP.NET AJAX architecture?

There are two components of AJAX Architecture:

AJAX client architecture

AJAX server architecture

What are the extender controls?

The extender controls uses a block of JavaScript code to add new and enhanced capabilities to ASP.NET.

What is AJAX Control Extender Toolkit?

AJAX Control Toolkit is one of the extenders that are used to extend or add the functionalities of the ASP.NET controls. The extenders use a block of JavaScript code to add new and enhanced capabilities to the ASP.NET controls.

Where AJAX cannot be used?

Users cannot use AJAX if

If Page need to show in a search engine

If browser does not support JavaScript

If user wants to create secure application

What are the pre-requisites to execute AJAX applications on a server?

AJAX is a built-in functionality of .NET Framework 4.0 and AJAX application can be executed by just installing Microsoft Visual Studio 2010. To use extenders in your applications, you are required to install AJAX Control Toolkit and copy the AjaxControlToolkit.dll file to the Bin directory of your application.

What is AJAX Framework?

ASP.NET AJAX is a free framework to implement Ajax in asp.net web applications. It is used to quickly creating efficient and interactive Web applications that work across all browsers.

How can you find out that an AJAX request has been completed?

ReadyState property is used to check whether AJAX request has been completed. If the property is equal to four, then the request has been completed and data is available.

Is javascript knowledge is required to do Ajax?

Yes, if you plan to develop new AJAX functionality for your web application.

What are all the browsers support AJAX?

Following browsers support AJAX:

Internet Explorer 5.0 and above

Opera 7.6 and above

Netscape 7.1 and above

Safari 1.2 and above

How can you test the Ajax code?

JSUnit is the client side javascript code used as part of JUnit. JSUnit has been used for Ajax code.

Is Ajax said to be a technology platform or is it an architectural style?

Ajax supports both technology and as architectural style.

How can AJAX applications be debugged?

Two tools are used for debugging:

Fiddler for IE

Firebug for Mozilla.

How can we cancel the XMLHttpRequest in AJAX?

Abort() method can be called to cancel the XMLHttpRequest in Ajax.

Is AJAX code cross browser compatible?

No, it is supporting cross browser compatible. If the browsers supports native XMLHttpRequest JavaScript object, then this can be used.

What is the name of object used for AJAX request?

XmlHttpRequest object is used for Ajax requests.

What is prerequisite for Update Panel in Ajax ?

Script Manager is pre-requisite to use Update Panel controls.

How many update panel can be used per page?

There are no restrictions on the number of update panels per page.

What is Script Manager?

Script Manager helps manage the client side script of AJAX. Script Manager acts as a mediator as AJAX depends on JavaScript. Every page that uses AJAX has a Script Manager to enable AJAX libraries.

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