By Adam Calderon, Joel Rumerman
Server controls are an imperative element of each ASP.NET program we construct. They encapsulate browser visual appeal and server performance in a reusable item. they are often used throughout a number of pages inside a unmarried ASP.NET program in addition to throughout a number of ASP.NET purposes. ASP.NET comes with loads of prebuilt server controls. we've basic controls comparable to the label and we've got advanced controls resembling the GridView. We even have the power to create our personal server controls to fulfill a necessity no longer met by means of one of many present controls by way of inheriting from the correct base classification and overriding its tools as needed.
This version of utilizing server controls to encapsulate browser visual appeal and server performance has served our wishes good because the inception of ASP.NET 1.0, yet our server keep watch over wishes are changing.
A new server keep watch over want that has lately surfaced is the power to include Ajax performance at once into the server control.
This want arose simply because our internet functions have to be extra responsive and visually interactive than the normal ASP.NET repaint-the-entire-screen version and for that reason the conventional server regulate provides. This requirement has emerged simply because clients are utilizing websites equivalent to Gmail, Live.com, Yahoo! Mail, and others that don't repaint the monitor at any time when they click on a button or have to obtain clean information. particularly, they depend on Ajax to fetch clean facts after which replace or upload to a component to the monitor established upon that facts. simply because those websites are seriously used and clients particularly get pleasure from their adventure whereas utilizing those web content they anticipate different websites to accomplish with an identical attractiveness as they do. while an internet site doesn't practice with an analogous beauty the consumer will usually circulate onto one other site that does. these well known functions have raised the bar for what's an acceptably common internet site.
Because our clients are challenging an internet site event that basically makes use of Ajax and we construct our ASP.NET sites utilizing server controls, we'd like a manner of simply growing server controls that not just encapsulate browser visual appeal and server performance, but additionally contain Ajax performance in order that the server keep an eye on itself is Ajax-enabled.
Taking a step again for a second, in contrast to different applied sciences you've got learn books on, ASP.NET AJAX server controls don't offer you something that you just couldn't already do. We've constantly been capable of embed Ajax-functionality into server controls ... it was once only a genuine pain.
Furthermore, if you happen to had a number of server controls that had purchaser functions it used to be tough (but now not very unlikely) to make sure that the customer capabilities that every server regulate required didn't overwrite one another while rendered at the browser. monitoring down that challenge used to be continuously a enjoyable hour or so.
The hassle grew exponentially if we would have liked to incorporate a mechanism for asynchronously speaking with the server while the person pressed a button embedded within the server keep an eye on. despite a helper communique library there have been regularly tips to getting your regulate to speak thoroughly with the server.
These obstacles have been problematical sufficient to guide to a few undesirable programming behavior and undesirable code in addition to scare programmers clear of even trying to comprise Ajax-functionality of their server controls.
These difficulties are what Microsoft's ASP.NET AJAX solves.
In this ebook, we're going to educate you ways to take advantage of ASP.NET AJAX to create server controls that encapsulate Ajax performance. ASP.NET AJAX offers either server and customer programming constructs that make including Ajax-capabilities to our server controls effortless. to not sound cliché, yet with ASP.NET AJAX lowering the complexity of including Ajax-capabilities to our server controls, we're capable of create server controls whose Ajax functions are just restricted by way of our creativity. If we wish to listbox that self-updates with clean info, if we need a type-ahead textbox that dynamically populates from the server, or if we'd like a button submits an deal with for verification we will simply accomplish this via ASP.NET AJAX.
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Extra resources for Advanced ASP.NET AJAX Server Controls for .NET Framework 3.5
NET applications to support the company’s commercial real estate information business. NET community as an author and speaker. NET AJAX since late 2005 when he started work on a large-scale application for a worldwide independent software vendor. NET AJAX world provided him invaluable experience as he worked closely with Microsoft as a member of the ATLAS First Access program and participated in a Strategic Design Review of the technology. NET AJAX, including a Virtual Earth mash-up that maps commercial real estate properties.
Believe it or not, your support throughout this whole process has meant a lot to me. xxxvii This page intentionally left blank About the Authors Adam Calderon is a C# MVP and the Application Development Practice Lead at InterKnowlogy. He is an accomplished software developer, author, teacher, and speaker with more than 14 years of experience designing and developing solutions on the Microsoft platform. NET ATLAS First Access program and later as a member of the UI Server Frameworks Advisory Council.