cegonsoft foundation | ASP.NET AJAX with various Server Controls

[ramniz360]

AJAX

AJAX is mainly a technology placed within browser softwares.

It is required to send the particular control request in webapps to the server.
- Make web apps more responsive
• Provide continuous feedback
• Update only a portion of the page
• Users don’t have to:
- Wait for the entire page to refresh
- Re-orient themselves after a page refresh
- Provide real time updates
• Simulate “pushing” data to the browser
• Example: A list of stock prices that update without refreshing the whole page

SERVER CONTROLS

SCRIPT MANAGER
- Heart of ASP.NET AJAX
- Required for using ASP.NET AJAX
- Registers AJAX Client Library
- Enables partial page rendering (Update Panels)
- Can be used for registering custom scripts

Update Panel
- Update selected regions of the web page
- AsyncPostback/Partial Rendering
- Asp.net page cn contain one or more update panels.

Update Mode
- Always
- Conditional
Triggers
- Children
- External

Update Progress Control

-Enables us to provide status information about partial page updates in update panel control.

Timer Control

-Performs postback at defined intervals.We can use timer control with an update panel control to enable partial page updates at a defined interval.We can also use timer control to post the whole page.

Script Manager Proxy

-This controls behaves like a substitute for script manager, which can be used to execute scripts.

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[Johnmayor]

Are you using AJAX to create interactive web applications? Learn how Altova’s suite of application management and web data management tools can optimize your development process. The following are just a few of the products & features included in the Altova MissionKit:

XMLSpy is a powerful XML editor. It also includes XML Schema, JSON, and WSDL/SOAP editors for valid and seamless data exchange in AJAX applications. It also includes a fully functional CSS editor for presentation styling.

MapForce is a graphical data mapping, conversion, and integration tool. With MapForce, you can aggregate your data from various sources (database servers, etc.) and expose it in an XML format directly or through a Web service.

DatabaseSpy is a multi-database query and design tool. It is ideal for working with the data stored in secure database backend servers. It connects simultaneously to multiple relational database servers (Oracle, IBM DB2, SQL Server, etc.) and understands XML data inside the database like no other database tool.

DiffDog is an XML-aware differencing utility. Instantly diff and merge your source code files, XML documents, XSLT stylesheets, schemas and other components of your AJAX architecture.

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[madhusundar]

Asynchronous JavaScript + XML (AJAX) is essentially a branding term for a bundle of common web technologies.
These include JavaScript, DHTML and a utility object called XMLHTTP.

For ASP.NET applications, a new set of AJAX-style ASP.NET Server Controls will be developed and the existing ASP.NET page framework and controls will be enhanced to support the Atlas Client Script Framework.
The Atlas Client Script Framework will fully support ASP.NET 2.0 client callbacks, but will enrich the level of
integration between the browser and the server.
For example, you will be able to data bind Atlas client controls to ASP.NET data source controls on the server,
and you’ll be able to control personalization features of web parts pages asynchronously from the client.

With ASP.NET Web Services Integration, Atlas applications will be able to access any ASP.NET-hosted ASMX or Indigo service directly through the Atlas Client Script Framework, on any browser that supports XMLHTTP.
The framework will automatically handle proxy generation,
and object serialization to and from script.


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[chicomarx]

Asynchronous JavaScript + XML (AJAX) is essentially a branding term for a bundle of common web technologies. These include JavaScript, DHTML and a utility object called XMLHTTP. The short story is that in combination, these tools reduce the need for web browser applications to reconnect to a web server every time additional data is downloaded.

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[gabrilla]

AJAX, or Asynchronous JavaScript and XML, is a fancy way to use JavaScript and XML to communicate with a web server without refreshing the web page. You can visit this web page for more information about AJAX; it has a good list of links.

Why use AJAX?

There are a couple of reasons to use AJAX in lieu of the traditional form submission. The first is that it is very light weight: instead of sending all of the form information to the server and getting all of the rendered HTML back, simply send the data the server needs to process and get back only what the client needs to process. Light weight means fast.

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[seamustaylor]

Web Forms applications that use Ajax features offer the following features:

Familiar interactive UI elements such as progress indicators, tooltips, and pop-up windows.

Improved efficiency for Web Forms application, because significant parts of a Web page's processing can be performed in the browser.

Partial-page updates that refresh only the parts of the Web page that have changed.

Client integration with ASP.NET application services for forms authentication, roles, and user profiles.

Auto-generated proxy classes that simplify calling Web service methods from client script.

The ability to customize server controls to include client capabilities.

Support for the most popular browsers, which includes Microsoft Internet Explorer, Mozilla Firefox, and Apple Safari.
The server pieces that support Ajax development consist of ASP.NET Web server controls and components that manage the UI and flow of an application. The server pieces also manage serialization, validation, and control extensibility. There are also ASP.NET Web services that enable you to access ASP.NET application services for forms authentication, roles, and user profiles.
Script Support

Ajax features in ASP.NET are commonly implemented by using client script libraries that perform processing strictly on the client. You can also implement Ajax features by using server controls that support scripts sent from the server to the client.

You can also create custom client script for your ASP.NET applications. In that case, you can also use Ajax features to manage your custom script as static .js files (on disk) or as .js files embedded as resources in an assembly.

Ajax features include a model for release and debug modes. Release mode provides error checking and exception handling that is optimized for performance, with minimized script size. Debug mode provides more robust debugging features, such as type and argument checking. ASP.NET runs the debug versions when the application is in debug mode. This enables you to throw exceptions in debug scripts while minimizing the size of release code.

Script support for Ajax in ASP.NET is used to provide two important features:

The Microsoft Ajax Library, which is a type system and a set of JavaScript extensions that provide namespaces, inheritance, interfaces, enumerations, reflection, and additional features. For more information see Creating Custom Client Script by Using the Microsoft Ajax Library.

Partial-page rendering, which updates regions of the page by using an asynchronous postback. For more information, see Partial-Page Rendering Overview.

Localization

The Microsoft Ajax architecture builds on the foundation of the ASP.NET 2.0 localization model. It provides additional support for localized .js files that are embedded in an assembly or that are provided on disk. ASP.NET can serve localized client scripts and resources automatically for specific languages and regions.

For more information, see the following topics:

Localizing Resources for Component Libraries Overview

Walkthrough: Embedding Localized Resources for a JavaScript File

Web Services

With Ajax functionality in an ASP.NET Web page, you can use client script to call both ASP.NET Web services (.asmx) and Windows Communication Foundation (WCF) services (.svc). The required script references are automatically added to the page, and they in turn automatically generate the Web service proxy classes that you use from client script to call the Web service.

You can also access ASP.NET Web services without using Microsoft Ajax server controls (for example, if you are using a different Web development environment). To do so, in the page, you can manually include references to the Microsoft Ajax Library, to script files, and to the Web service itself. At run time, ASP.NET generates the proxy classes that you can use to call the services. For more information, see ASP.NET Web Services in Ajax.
Application Services

Application services in ASP.NET are built-in Web services that are based on ASP.NET forms authentication, roles, and user profiles. These services can be called by client script in an Ajax-enabled Web page, by a Windows client application, or by a WCF-compatible client. For information and examples, see. ASP.NET Web Services.
Server Controls

Ajax server controls consist of server and client code that integrate to produce rich client behavior. When you add an Ajax-enabled control to an ASP.NET Web page, the page automatically sends supporting client script to the browser for Ajax functionality. You can provide additional client code to customize the functionality of a control, but this is not required.
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[arjunpktr]

Ajax is a boon in parallel programming in asp.net
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[mithunshalom]

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