Professional in C# and Visual Basic Part 68. Building on the revolutionary release, adds several key new developer features including AJAX, LINQ, and a new CSS designer in Visual Web Developer 2008. The dramatic reduction in code that developers realized from the more than 50 new server controls in now allows developers the time to make their applications more interactive with AJAX, to work with data in their preferred language with LINQ, and to build visually attractive and consistent standards-based sites with CSS. . | Extending the Provider Model The last chapter introduced the provider model found in and explained how it is used with the membership and role management systems. As discussed in the previous chapter these systems in require that some type of user state be maintained for long periods of time. Their time-interval and security requirements for state storage are greater than those for earlier systems that simply used the Session object. Out of the box gives you a series of providers to use as the underlying connectors for any data storage needs that arise from state management for these systems. The providers that come with the default install of the .NET Framework include the most common means of state management data storage needed to work with any of the systems. But like most things in .NET you can customize and extend the providers that are supplied. This chapter looks at some of the ways to extend the provider model found in . This chapter also reviews a couple of sample extensions to the provider model. First however you look at some of the simpler ways to modify and extend the providers already present in the default install of .NET . Providers Are One Tier in a Larger Architecture Remember from the previous chapter that providers allow you to define the data-access tier for many of the systems in . They also enable you to define your core business logic implementation on how the data is manipulated or handled. They enable you to use the various controls and APIs that compose these systems in a uniform manner regardless of the underlying data storage method of the provider. The provider model also allows you to easily swap one provider for Chapter 13 Extending the Provider Model another without affecting the underlying controls and API that are interacting with the provider. This model is presented in Figure 13-1. Z - Microsoft Visual Studio File Edit View Debug XML Tools Window .
