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What are the steps for handling concurrent requests in AJAX?

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Asked By: ganesh |

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In order to handle the request concurrently, its always better to achive through writing the separate function. For e.g.
xmlHTTPObj.Onreadystatechange = function1();
The above line of code will help us to do asynchronous processing. So function1() will be called when the XMLHTTP request object goes to on ready state change.
Dont forget to set the parameter "TRUE" in the Open method of xmlHTTPObj. The followign e.g. shows this.
xmlHTTPObj.open("GET","http://"+location.host + "XMLHTTPExample1/Webform1.aspx" true)
"true" reperesents the processing carried after the send() method, without waiting for a response. "false" means that processing waits for the response before continuing.

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Tuesday, March 18, 2008

Tags

AJAX, request, Concurrent

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205

If a page only has one gridview, no other controls. Should Ajax be used? Justify?

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Asked By: ganesh |

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if it is required the updation in data base should be display instanctly to the user every time then ajax is better to use ,otherwise it is not required.

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Tuesday, March 18, 2008

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AJAX, gridview, controls

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219

What are the limitations of AJAX?

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Asked By: ganesh |

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Ajax is primarily a client/server technology. Client nodes in the web do not typically run web servers that can respond to HTTP GET and POST requests. Since clients cannot directly communicate with each other, any distributed application developed usingAjax would require a central web server system to negotiate requests between clients. Client A could generate events/data for and respond to events/data from Client B however both would need to connect to a common web server to facilitate the communication.
Another limitation of Ajax is slow or unreliable network connections. Traditional web applications that require a full round-trip to the server may behave slowly for end users but they would be predictable. End users would generally intuitively know they have performed an action, such as submitting a form or clicking a link, and must wait for a server to respond. With Ajax, users have less intuition about which type of events within a page may result in a need to wait for a server response. Instead of enhancing the end user experience, Ajax over slow or unreliable network connections may reduce usability if not carefully designed to accommodate both fast and slow network characteristics.

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Tuesday, March 18, 2008

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AJAX, limitations

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324

What is DOJO?Is DOJO a part of AJAX?

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Asked By: ganesh |

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The Dojo toolkit is a modular open source JavaScript toolkit (or library), designed to ease the rapid development of JavaScript- or Ajax-based applications and web sites.
DOJO is the one of the Client-side Framework.

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Tuesday, March 18, 2008

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AJAX, dojo

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240

What is AJAX polling?

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Asked By: ganesh |

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AJAX polling script that uses Ajax to send vote to the server and receives vote results from the server.
Ajax is used to return the results from this poll to your browser.

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Tuesday, March 18, 2008

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AJAX, polling

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307

what are the types of ready states in ajax?

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Asked By: ganesh |

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there are 5 readyStates --
0 = uninitialized
1 = loading
2 = loaded
3 = interactive
4 = complete

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Tuesday, March 18, 2008

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AJAX, ready states

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134

How is user interfaces powerful in AJAX?

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Asked By: ganesh |

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AJAX helps in refreshing / requerying parts of web page without reloading the entrie webpage there by increasing performance and ultimately user interface

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Tuesday, March 18, 2008

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interface, AJAX, user

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260

What must be done to use an AJAX code be used across different browsers?

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Internet Explorer uses an ActiveXObject, while other browsers uses the built-in JavaScript object called XMLHttpRequest.
code:

<html> <body>
<script type="text/javascript">
function ajaxFunction() {
var xmlHttp; try {
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support AJAX!");
return false;
}
}
}
}
</script>

Create Date

Tuesday, March 18, 2008

Tags

browsers, AJAX

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193

What are the AJAX tools available for ASP.NET?

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Asked By: ganesh |

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Infragistics,NetAdvantage and Ajax Control ToolKit from microsoft.

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Tuesday, March 18, 2008

Tags

ASP.net, tools, AJAX

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213

What is JSON in AJAX?

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Asked By: ganesh |

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JSON is the JavaScript Object Notation, and it is a lightweight data interchange format. It provides Java Scripts eval() method to easily parse an XML.

Create Date

Tuesday, March 18, 2008

Tags

AJAX, json

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