Beginning ASP.NET 4.5 in CSharp and VB Opsylum

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386 x CHAPTER 11 JQUERY Fortunately, the Internet developer community has been very active developing frameworks that use JavaScript under the hood and that extend its power, while offering a very rich feature set that helps you create interactive client-side web pages. Over the years, many JavaScript libraries have been developed—most of which are free—including: ‰ Prototype (http://prototypejs.org) ‰ Scriptaculous, an add-on to Prototype (http://script.aculo.us) ‰ Ext JS (http://extjs.com) ‰ Dojo (http://dojotoolkit.org) One framework that has received a lot of attention is jQuery. Initially developed and released by John Resig in January 2006, jQuery has grown to be a very popular client-side framework. It also caught the attention of Microsoft, which decided to start shipping jQuery with Microsoft products. Initially, jQuery shipped with the Microsoft ASP.NET MVC Framework, but it’s now also included in Visual Studio 2012. AN INTRODUCTION TO JQUERY The main focus of the jQuery library has always been to simplify the way you access the elements in your web pages, provide help in working with client-side events, enable visual effects like animations, and make it easier to use Ajax in your applications. In January 2006, John Resig announced the first version of jQuery, which was followed by an official release of jQuery 1.0 in August 2006. Many more versions would follow, with version 1.7.2 as the latest, stable release at the time of writing. NOTE jQuery is under active development, and, as such, there’s a fair chance that by the time you read this book, a new version of jQuery will have been released. Although the code presented in this chapter is expected to be compatible with future versions, backward-compatibility issues may arise with later versions. If you fi nd that some of your code doesn’t work with the jQuery version you are using, consider using the fi les that come with this chapter’s download to rule out any problems with the new version. You have a few ways to acquire the jQuery library and add it to your website. First of all, you can download the latest version of jQuery from the official website at http://jquery.com. Not only will you find the downloadable files there, but you’ll also find the documentation, FAQs, tutorials, and much more information you can use to make the most out of jQuery. The second way is to use the ASP.NET Web Forms Site template to create a new site, because it already contains a Scripts folder with the necessary jQuery files. However, back in Chapter 2 you based the Planet Wrox website on the ASP.NET Empty Web Site template, which doesn’t include these files.
An Introduction to jQuery x 387 The third solution to add jQuery to your site is by using a Content Delivery Network (CDN) as you’ll see later. The final way is to use NuGet, the Library Package Manager that ships with Visual Studio (including the Express editions). NuGet is discussed next. Introducing NuGet NuGet is an open source Library Package Manager that comes as a Visual Studio extension and that makes it very easy to add, remove, and update external libraries in your Visual Studio projects and websites. It was initially developed by Microsoft but has now been turned into an Open Source project that accepts contributions from the developer community. Although you’ll see NuGet used in the context of a website in VS, NuGet is certainly not for ASP.NET only. You can use it for all types of applications you can build with Visual Studio. To understand what problems NuGet solves, imagine you want to add an open source library such as jQuery to your ASP.NET website. Although the specifics differ from library to library, you usually need to go through the following steps: 1 . Find the website of the library. 2. Find a link to the download of the latest stable version of the library and download it. 3. Unblock the downloaded file using Windows Explorer, unzip it, and add it to your project, optionally creating a specific folder for it. 4. Optionally, add a reference to the library in your project. 5. Optionally, configure the library through the Web.config file or other code files. Using NuGet, you can greatly minimize the steps needed to add libraries to your project. For example, you can add the jQuery library with just five mouse clicks. In addition to adding packages, NuGet also enables you to easily update libraries to their latest versions after you’ve added them to your website, and it enables you to remove packages again without leaving a trace. Besides the extension for Visual Studio, NuGet also has its own website at http://nuget.org. Here you can browse the catalog of packages, find commands for installing packages (more on that in the next section), read detailed documentation, and more. To manage libraries with NuGet, you have two options: you can use the Manage NuGet Packages dialog box or use the Package Manager Console. Using the Manage NuGet Packages Dialog Box The Manage NuGet Packages dialog box enables you to search for packages online, as well as manage packages you already installed. You access this dialog box by right-clicking your website in the Solution Explorer and choosing Manage NuGet Packages. Alternatively, choose Tools Í Library Package Manager Í Manage NuGet Packages for Solution. Figure 11-1 shows the dialog box in action.
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BEGINNING ASP.NET 4.5 FOREWORD . .
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BEGINNING ASP.NET 4.5 IN C# AND VB
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—To Niek
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CREDITS Acquisitions Editor Mary Ja
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CONTENTS FOREWORD INTRODUCTION xxxi
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CONTENTS Working with Files in Your
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CONTENTS Not All Controls Rely on V
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CONTENTS Skins 245 Creating a Skin
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CONTENTS Providing Feedback to User
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CONTENTS Single Item Controls 455 P
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CONTENTS Authentication: How Can Yo
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CONTENTS Introducing Bundling and M
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INTRODUCTION TO BUILD EFFECTIVE AND
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INTRODUCTION ‰ Chapter 4, “Work
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INTRODUCTION HOW THIS BOOK IS STRUC
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INTRODUCTION ‰ Code shown for the
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INTRODUCTION FIGURE I-2 The Site fo
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BEGINNING ASP.NET 4.5
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2 x CHAPTER 1 GETTING STARTED WITH
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4Working with ASP.NET Server Contro
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Introduction to Server Controls x 1
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Introduction to Server Controls x 1
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A Closer Look at ASP.NET Server Con
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A Closer Look at ASP.NET Server Con
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Types of Controls x 117 FIGURE 4-4
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Types of Controls x 119 The Smart T
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Types of Controls x 121 } DropDownL
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Types of Controls x 123 Container C
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Types of Controls x 125 Note that t
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Types of Controls x 127 FIGURE 4-12
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Types of Controls x 129 FinishButto
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Types of Controls x 131 FileUpload
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Types of Controls x 133 Validation
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The ASP.NET State Engine x 135 serv
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The ASP.NET State Engine x 137 FIGU
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The ASP.NET State Engine x 139 4. A
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Practical Tips on Working with Cont
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Summary x 143 ⊲ WHAT YOU LEARNED
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6Creating Consistent Looking Websit
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Consistent Page Layout with Master
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Using a Centralized Base Page x 219
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Themes x 229 With this exported tem
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Themes x 231 Replace Theme with Sty
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Themes x 233 type="text/css" rel=
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Themes x 235 ASP.NET themes are not
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Themes x 237 FIGURE 6-19 How It Wor
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Themes x 239 VB.NET Dim myCookie As
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Themes x 241 FIGURE 6-21 Within the
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Themes x 243 C# preferredTheme.Valu
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Skins x 245 a cookie called Preferr
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Skins x 247 3. In the Extension box
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Practical Tips on Creating Consiste
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Summary x 251 The imaginary CSS cla
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7Navigation WHAT YOU WILL LEARN IN
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Different Ways to Move Around Your
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Using the Navigation Controls x 257
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Programmatic Redirection x 277 Redi
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Programmatic Redirection x 279 How
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14 LINQ and the ADO.NET Entity Fram
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Introducing LINQ x 499 surprise tha
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Mapping Your Data Model to an Objec
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Introducing Query Syntax x 507 and
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Introducing Query Syntax x 509 Wher
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Summary x 551 model. Combined with
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15 Working with Data — Advanced T
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Formatting Your Controls Using Styl
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Handling Events x 563 background-im
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Handling Events x 565 4. Make sure
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Handling Events x 567 The PreRender
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Handling Events x 569 Button1_Click
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Handling Events x 571 Select Case e
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Caching x 589 In all the database e
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Caching x 591 Output Caching With o
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Caching x 593 Programmatic Caching
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Caching x 595 ‰ SummaryLabel ‰
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Caching x 597 } font-style: italic;
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Caching x 599 expiration date, whic
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Summary x 601 EXERCISES 1. Imagine
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16 Security in Your ASP.NET 4.5 Web
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The Role Manager x 631 FIGURE 16-19
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The Role Manager x 633 2. Save and
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The Role Manager x 635 Management s
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The Role Manager x 637 Alternativel
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The Role Manager x 639 } } case Lis
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Summary x 641 SUMMARY You can imple
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17 Personalizing Websites WHAT YOU
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Understanding Profile x 645 In the
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Understanding Profile x 647 You can
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Understanding Profile x 651 To defi
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Understanding Profile x 653 press t
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Understanding Profile x 661 That’
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Other Ways of Dealing with Profile
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Summary x 675 How It Works Much of
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BConfiguring SQL Server 2012 So far
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allowAnonymous attribute - ASP.NET
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input controls - handling input co
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Microsoft Developer Network - New S
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text strings - types validation con
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validation controls- ViewState coll
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web services - Where clause flow of
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