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As security is becoming more and more of a necessity as opposed to a luxury when dealing with the Web, it is essential to make users experiences with security as friendly as possible, while still protecting them from malicious web sites. CardSpace fills this void by providing an easy-to-use and attractive way of storing your personal information securely and digitally, and an easy means to send it to a web site that requests it. It is designed to be a long-term replacement for passwords, and can effectively form a client-based single sign-on for all of your favorite sites. In this chapter, you explored CardSpace and how it looks from the user s point of view. You then went into putting together a development environment where you can host your own sites that accept CardSpace credentials. As part of this exercise, you looked briefly at site certificates and how they prevent domain spoofing. You then went into the process of building your own CardSpace-enabled site, looking at how to embed the CardSpace object on your pages and process it, taking user credentials and using them to customize the site for the end user. Finally, you took a tour of a helper class that is provided by the SDK and that implements the token in an easily manageable way. I hope this was a good taste of what you can do with CardSpace to make your users lives a lot easier. There s a lot more information that you can drill into and a great resource for this is the Windows SDK documentation. In the next chapter, we ll get back onto the traditional web development route looking at the technology that effectively gave birth to Web 2.0 Asynchronous JavaScript and XML, also known as Ajax.

Up until now, you ve seen various features of SQL Server that provide a strong integration between relational and XML data. But that s not all. This section gives the next installment of the XML features of SQL Server: the XML data type. Prior to SQL Server 2005, storing XML data in a table essentially meant that you had to use a VARCHAR or TEXT column for the data. From the point of view of storage, this was fine; but from a data-manipulation point of view, it was tedious. The XML data was treated just like any other text data. The new XML data type introduced in SQL Server 2005 is exclusively for storing XML documents and fragments.

Your portlet can use a portlet request dispatcher to include the content from a servlet or JSP page. The portlet request dispatcher translates the portlet s render request and render response into servlet requests and responses. Then the portlet request dispatcher passes those servlet objects to the appropriate servlet or JSP resource. The resource processes the render request as if the request was an HttpServletRequest and adds its content to the portlet s render response. Each portlet has access to a portlet request dispatcher through the portlet s PortletContext object. The portlet request dispatcher is an object the portlet container creates that implements the PortletRequestDispatcher interface. Here are the two methods for retrieving a PortletRequestDispatcher object from the PortletContext object:

jax (Asynchronous JavaScript and XML) has become a major value proposition in the Web development industry. Indeed, 2006 was often called the year of Ajax because no matter where you turned, it seemed every software vendor was pushing their Ajax toolkit, Ajax sessions at conferences were filled to the rafters, and everybody wanted to use it on their web site. But Ajax has been around a lot longer than this it s just that it seemed to hit critical mass in that year. In this chapter, you ll look at what Ajax is at its core no toolkits, no value-adds or complexities, just a good look at the technology underpinning the whole Ajax phenomenon. You ll start with a history of where it came from, an analysis of why it evolved, a good look at its architecture, and some hands-on experience in building some simple Ajax interactions using good old-fashioned JavaScript and HTML. .NET and After that, the next few chapters will look at the AJAX extensions for ASP how these can empower your Ajax development experience by bringing the productivity of the server-side paradigm of ASP .NET and a suite of new JavaScript libraries to bear.

without any root element. Remember that the FOR XML clause by default returns XML fragments and not documents.

public PortletRequestDispatcher getNamedDispatcher(String name) public PortletRequestDispatcher getRequestDispatcher(String path)