微软AJAX更新面板的替代品？

Question

as you all know update panel send the same response to server as a full post back ( or maybe i am understanding wrong), it is true that it is much better than a full post back.

so is there an alternative to send only response data ? like you have a method that ill return date, i think this is the only thing that should be sent and not the whole control view state that is going to show it ( again maybe i understood it wrong).

i am using Telerik AJAX controls, and they are built upon Microsoft AJAX so there is not much of improvement there.

one approach i like is http://www.coolite.com/ they have AJAX Methods and events, which i think is what i am looking for, but the project is moving slowly and does not have flexibilities for my requirements.

so any input is highly appreciated.

Answer 1

If you want more control, one technique is to use JQuery and AJAX Client Library for ADO.NET Data Services to bind JSON data on the client side.

Check this sample here . This is a good example of JQuery complementing ASP.Net AJAX.

First, I'm retrieving data from SQL Server and I need it in JSON format. I'm using the AJAX Client Library for ADO.NET Data Services to make a REST (GET) query to the back-end. To start with I'll just get the data...I include "datatable.js" as a client-side script and use Sys.Data.DataService() to make an async query. In JavaScript you can tell it's a Microsoft type if it's got "Sys." front of it. All the client support for ADO.NET Data Services is in datatable.js.

Answer 2

This is why I encourage programmers new to AJAX to learn the basics before adopting a library - when you understand what's actually happening, this sort of optimization becomes obvious.

so is there an alternative to send only response data? Like, you have a method that will return only a date?

Yes. The most basic way is to just write the date string to the response stream and end the response before anything else is sent - HTTP Handlers (ashx) work great for this. For a more ASP.NET AJAX-friendly technique, check out Web Methods.

Answer 3

Rather than investigate controls I would suggest you investigate Ajax as a technology, and find out how it works. Having done this then look at the available implementations eg UpdatePanels, JQuery, etc

Answer 4

as you all know update panel send the same response to server as a full post back ( or maybe i am understanding wrong)

The main idea of the AJAX framework is to eliminate full-page postbacks. Only the relevant parts of the page are updated, without a disturbing refresh. The markup that is transferred between the client machine and the server is reduced dramatically, which results in a significant performance improvement for the user.

but if you looking for an alternative to page postback then I would recommend jQuery , but from the question it seems as if you're new to AJAX, so assuming you know javascript, hopefully you know that first to understand how jQuery works