Pages Directives

These directives like:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TopTenEgypt._Default" %>
General syntax:
<%@ [Directive] [Attribute=value] [Attribute=value] %>

Directives are:

1. Assembly: To link an assembly to a page or user control.
2. Control: User controls, ASCX files.
3. Implements: Implement a .NET Framework interface
4. Import: Imports a namespace into a page or a user control.
5. Master: a Master page
6. MasterType: Associate a class name to a page to get a strongly typed references or members of the specified master page.
7. OutputCache: To control the output cache of the page or user control.
8. Page: used with ASPX files to specify the page attributes. 
9. PreviousPageType: enable the page to work with post back from another page in the application.
10. Reference: To link another page or user control to the current page or user control.
11. Register: To associate aliases with namespaces and class names for notation in customer server control syntax.

Directives attributes:

1. AspCompat: To permit the page to be executed on a single-threaded apartment thread [Default=False] 
2. Async: To specify the page to be processed synchronously or asynchronously 
3. AsyncTimeout: the amount of time to wait the async task to complete [default=45 Sec]
4. Buffer: To enable HTTP response buffering [default=True]
5. ClassName: the class that is bound to the page when the page is compiled.
6. ClientIDMode: Specify how the page generate the ClientID values for its server controls
7. ClientTarget: Specify the taget user agent the control should render content for, Should be tied to an alias in Web.config file in <ClientTarget> Section.
8. CodeFile: The Code-behind file
9. CompilationMode: ASP.NET should compile the page or not [Auto,never, Always]
10. CompilerOptions: Compilation Options of the page.
11. CompileWith: the code-behind file used (?)
12. ContentType:the content type of the HTTP response as MIME Type.
13. Culture: the culture attribute of the page, can be Auto.
14. Debug: If True, compile the page with debug symbols in place.
15. EnableEventValidation: If true, validate the events in post-back and callback.
16. EnableSessionState: To Enable/disable the session state for the page.
17. EnableTheming: If True, the page is enabled to use themes.
18. EnableViewstate: If True, View state is maintained across the page. 
19. EnableViewstateMac: If true, page runs a machine-authenticated check on the page view state when the page is posted back.
20. ErrorPage: an URL to post in case of all unhandeled page exceptions.
21. Langauge
22. LCID: Defined the Locale Identifier for web form's page.
23. LinePragmas: weather line pragmas are used with the resulting assembly.
24. MasterPageFile: Used with content pages to points to the master page file (.master).
25. MaintainScrollPositionOnPostback
26. MetaDescription (ASP.NET 4.0): Page description for SEO purposes.
27. Metakeywords (ASP.NET 4.0)
28. ResponseEncoding
29. SmartNavigation: like MaintainScrollPositionOnPostback
30. Src: Points to the source file of the class used for the code behind of the page being rendered.
31. Strict: (VB)If true,Compile page in Strict Mode
32. Theme: Applying the specified theme on the page.
33. StyleSheetTheme: like Theme, but StyleSheetTheme wont override preexisting style setting in the controls.
34. Title
35. Trace: If true, enable Trace messages on the page.
36. TraceMode: like SortByTime, SortByCategory
37. Transaction: Specify weather transacctions are supported on the page. [Default=False].
38. UICulture: which UI Culture to use on the page, use Auto to automatic detection of UI culture.
39. ValidateRequest: If True, the page inputs are checked against a list of potential dangerous values to protecet your application from attacks like JavaScript attacks. 
40. ViewStateEncriptionMode: Specify how the view-state are encrypted [Default=Auto] 
41. WarningLevel: Specify the compiler warning level at which stop compilation of the page.

@PreviousPageType

Used to specify the page from which any cross-page posting originates. 

Attributes:

1. TypeName: the name of the class from which the post-back will occur.
2. VirtualPath: the locati

@OutputCache

Controls the output cahcing polices of ASp.NET page or use control.

Attributes:

1. CacheProfile: To central the way of managing an application cache profile, use the CacheProfile detailed in web.config file.
2. Duration: the caching time in seconds
3. Location: works with ASPX files only, values [None, DownStream, Client, Server, ServerAndClient].
4. NoStore: To send No-Store header with the page.
5. Shared: Specify weather a user control output can be shared across a multiple pages
6. SqlDependecy: To enable the page to use SqlDependency.
7. VaryByControl: Semicolon-separated list of strings used to vary the output cache of a  user control.
8. CaryByCustom: String specifing the custom output cacheing requirement.
9. VaryByParm: Semicolon-seperated list of strings used to vary the output cache.
10. VaryByHeader: Semicolon-seperated list of HTTP headers used to vary the output cache