Book Image

ASP.NET jQuery Cookbook

By : Sonal Aneel Allana
Book Image

ASP.NET jQuery Cookbook

By: Sonal Aneel Allana

Overview of this book

<p>jQuery is a powerful, lightweight JavaScript library that simplifies various web development tasks. With the integration of jQuery with Visual Studio 2010, it has become increasingly popular for ASP.NET developers to use jQuery's awesome power in their applications. Combining jQuery and ASP.NET creates applications that are anything but lightweight. Using this Cookbook you will become adept at using this library in your ASP.NET web applications.</p> <p>This cookbook shares the most powerful, impressive, and just plain handy jQuery secrets for ASP.NET developers. From substitute server-side code to corresponding client script, it shows ASP.NET developers how to get the most from jQuery in a simple, effective, and easy manner.</p> <p>The cookbook takes a pragmatic approach in applying the jQuery library to ASP.NET applications. It will help you to master the use of jQuery with ASP.NET by taking you step-by-step through hands-on, practical recipes. With its help, you can learn to manipulate various ASP.NET controls like TextBox, CheckBoxList, DropDownList, BulletedList, Hyperlink, Image, and GridView as well as custom user controls. The book teaches client validation techniques thus providing a substitute for the server-side Validation Control. It explores various graphic and animation effects that can be accomplished very easily with the library to give a better interactive experience to the end user. It explores AJAX in depth and describes the use of Firebug to view / troubleshoot the corresponding request / response dialog. You will also learn to develop rich content using client scripting.</p>
Table of Contents (15 chapters)
ASP.NET jQuery Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Cross site AJAX querying using jQuery


Web browsers, for security reasons, enforce a 'same domain policy' and allow AJAX calls to pages only on the same domain. One method of getting around this restriction to make cross domain requests is to use JSONP (JSON with padding). In this recipe, we will demonstrate an example of cross site querying using Yahoo! Search API and jQuery AJAX.

Note

JSONP is simply JSON wrapped in a user specified function call. The remote JSONP-enabled service receives a callback function name from the client (the calling script). It then returns the JSON response as a parameter in the specified callback function. This function is subsequently executed on the client browser.

Getting ready

  1. Add a new web form Recipe5.aspx to the current project.

  2. Add a TextBox with a Search button control to the form as follows:

    <form id="form1" runat="server">
        <div align="center">
        <asp:TextBox ID="txtKeyword" runat="server"></asp:TextBox>
        <asp:Button ID...