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Site definitions are now easier to create as they can be composed using feature references. The pages that link to a Master Page are known as content pages. For each extensibility point in Enterprise Library there are typically a few interacting classes involved. An obvious extension is a provider that follows secure practices for discovering and loading plug-ins. In many steps, Enterprise Library uses abstractions, such as interfaces and abstract classes, to accomplish certain tasks. This is the approach taken with all the list types that ship as part of WSS collaboration services. Before you can create your first WSS site, you need to run an administrative procedure that extends the WSS functionality to one or more IIS Web sites. This adds Enterprise Library functionality to the class; among other things, this lets you store the configuration section somewhere other than the application configuration file. aspx pages are parsed and compiled. This internal class creates a new, empty PlugInLoaderSettings instance and then uses the node hierarchy to add configuration data to that instance. We first examined Contoso. master pages within WSS sites, and you can create new pages within a site that has no corresponding page template on the Web server. The design-time component is another library assembly that you can create and include. In this method call, I also provide display texts and an instance of AddPlugInLoaderSettingsNodeCommand, which is invoked if the user selects to perform this action. This is because assemblers are tied to implementations of PlugInProvider, not the abstract PlugInProvider class itself. Site definitions are now easier to create as they can be composed using feature references. These static tokens allow you to hardcode a relative path to a Master Page from either the root of the current site or the root of current site collection. For that reason, I will call it NaivePlugInProvider. Many developers wanted to be able to work with WSS fields at a lower level to obtain more control over field rendering and validation. WSS then uses this table to improve the performance of return data from views, especially when you use a view with a filter based on the indexed column. Defining Plug-In ConfigurationThe configuration framework of Enterprise Library builds on top of System. It defines the name for a column, its underlying field type, and other characteristics such as the default value, formatting, and validation. WebPartPages namespace and let it do all this work for you behind the scenes. All of the examples draw from my experiences with real companies building real Web applications, and in some cases I provide background by describing some of the problems that the ASP. dll has been modified to inherit from the ASP. This dynamic token works in conjunction with the CustomMasterUrl property of a site and provides a secondary target Master Page that can be redirected programmatically. It has run without error for more than two years since. Lo and behold, the application ran for days without a single cross-session incident. Factories for ObjectsEnterprise Library creates objects using factories. You may be asking yourself why all this complexity is required. This technique of changing a base class in a later version of an assembly is known as rebasing. As you read through this step-by-step guide, you may wonder why it is necessary to have so many moving parts. All of the examples draw from my experiences with real companies building real Web applications, and in some cases I provide background by describing some of the problems that the ASP. It is a bit of a hack, but the user will never notice, because I will also deal with this convention in the design-time component. Fortunately, Enterprise Library and System. Within the XML files and . You can customize the Master Page for a site if you like, leaving the content pages uncustomized. SharePoint Designer provides both a code editor and a WYSIWYG designer for customizing . This is a tokenized reference to a Master Page that can be changed programmatically on a site-wide basis. A site column is defined within the scope of a single site, yet it is visible to all child sites below. Some of these mistakes affect performance. Defining Plug-In ConfigurationThe configuration framework of Enterprise Library builds on top of System. This adds Enterprise Library functionality to the class; among other things, this lets you store the configuration section somewhere other than the application configuration file. Another possible extension is one that pulls plug-ins from blobs in a SQL Server table, possibly creating an optional dependency on the data access application block. The WebPart class in the older version of Microsoft. NaivePlugInProviderData is outfitted with an Assembler attribute. The idea is that a developer can write a custom component that retrieves