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Download e-book for kindle: Advanced ASP.NET AJAX Server Controls for .NET Framework 3.5 by Adam Calderon, Joel Rumerman

By Adam Calderon, Joel Rumerman

ISBN-10: 0321514440

ISBN-13: 9780321514448

Server controls are an essential point of each ASP.NET software we construct. They encapsulate browser visual appeal and server performance in a reusable item. they are often used throughout a number of pages inside of a unmarried ASP.NET software in addition to throughout a number of ASP.NET purposes. ASP.NET comes with loads of prebuilt server controls. now we have easy controls resembling the label and now we have complicated controls resembling the GridView. We even have the facility to create our personal server controls to fulfill a necessity no longer met through one of many current controls through inheriting from the proper base type 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 regulate wishes are changing.

A new server regulate desire that has lately surfaced is the facility to include Ajax performance without delay into the server control.

This desire arose simply because our internet functions have to be extra responsive and visually interactive than the conventional ASP.NET repaint-the-entire-screen version and for that reason the normal server keep watch over offers. This requirement has emerged simply because clients are utilizing sites comparable to Gmail, Live.com, Yahoo! Mail, and others that don't repaint the display whenever they click on a button or have to obtain clean facts. particularly, they depend upon Ajax to fetch clean info after which replace or upload to a component of the reveal dependent upon that information. simply because those sites are seriously used and clients fairly take pleasure in their event whereas utilizing those web content they anticipate different websites to accomplish with an analogous beauty as they do. whilst an internet site doesn't practice with an analogous splendor the consumer will frequently stream onto one other site that does. these renowned purposes have raised the bar for what's an acceptably uncomplicated internet site.

Because our clients are difficult a website event that primarily makes use of Ajax and we construct our ASP.NET websites utilizing server controls, we want a fashion of simply growing server controls that not just encapsulate browser visual appeal and server performance, but in addition contain Ajax performance in order that the server keep watch over itself is Ajax-enabled.

Taking a step again for a second, not like different applied sciences you may have learn books on, ASP.NET AJAX server controls don't give 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 actual pain.

There have been a couple of diverse equipment lets use to incorporate the JavaScript with our server keep watch over akin to embedding it as a source, yet we finally ended up having to do an analogous 3 projects. To make our server keep watch over have a few critical consumer features we consistently needed to concatenate strings jointly to shape JavaScript statements and features, write browser sniffing statements to ensure that the JavaScript used to be cross-browser appropriate, and upload attributes or render out Html that connected the JavaScript performance to the buyer models of our server controls. It wasn't most unlikely, however it was once error-prone and there has been constantly this mingling of server code and JavaScript that used to be demanding to keep up or even tougher to read.

Furthermore, should you had a number of server controls that had consumer features it was once tough (but now not very unlikely) to make sure that the customer services that every server keep an eye on required didn't overwrite one another while rendered at the browser. monitoring down that challenge used to be constantly a enjoyable hour or so.

The trouble grew exponentially if we would have liked to incorporate a mechanism for asynchronously speaking with the server whilst the consumer pressed a button embedded within the server keep an eye on. in spite of a helper verbal exchange library there have been continually tips to getting your regulate to speak competently with the server.

These stumbling blocks have been complex sufficient to steer to a couple undesirable programming conduct 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 publication, 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 presents either server and purchaser programming constructs that make including Ajax-capabilities to our server controls effortless. to not sound cliché, yet with ASP.NET AJAX decreasing the complexity of including Ajax-capabilities to our server controls, we're capable of create server controls whose Ajax functions are just constrained via our creativity. If we wish to listbox that self-updates with clean facts, if we'd like 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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Additional info for Advanced ASP.NET AJAX Server Controls for .NET Framework 3.5

Sample text

For now, however, let’s go over some object basics. Basics First, we can create new objects in two different ways. We can use the builtin Object type with the new keyword, or we can use an object literal. An object literal is a string that defines the object and is begun with a left curly brace ({) and ended with a right curly brace (}). 5 demonstrates using these two methods to create two new object instances. 5 Creating New Object Instances var myCar = new Object(); var myCar2 = { }; 9 10 Chapter 1: Programming with JavaScript These objects already have a function available just because they’re objects.

This is a good thing and was a “quick win” for Microsoft. NET developers and provided a unique advantage against other AJAX frameworks. NET AJAX server control development we’re covering. We’re not saying it’s not an important server control and that it has no place in the AJAX world. Rather, it is an extremely valuable tool whose complexity and correct usage is worthy of a small book; just not this one. Finally, although we do not cover how to use the UpdatePanel, we do cover how to create server controls so that they work correctly in an UpdatePanel, or more specifically a partial-postback, environment.

If you want to master it completely, we recommend JavaScript: The Definitive Guide by David Flanagan and Pro JavaScript Techniques by John Resig. NET AJAX and not JavaScript, however, we cannot cover every nook and cranny of the language. Instead, we try to tackle concepts that you might have glossed over S WE COVERED IN THE 3 4 Chapter 1: Programming with JavaScript in your day-to-day development. Topics we cover are functions as firstclass objects, primitive data types, objects, equality, variable scope, and function arguments.

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Advanced ASP.NET AJAX Server Controls for .NET Framework 3.5 by Adam Calderon, Joel Rumerman


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