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System.Web Namespace

.NET Framework 1.1

The System.Web namespace supplies classes and interfaces that enable browser-server communication. This namespace includes the HttpRequest class which provides extensive information about the current HTTP request, the HttpResponse class which manages HTTP output to the client, and the HttpServerUtility class which provides access to server-side utilities and processes. System.Web also includes classes for cookie manipulation, file transfer, exception information, and output cache control.

Namespace hierarchy

Classes

Class	Description
AspNetHostingPermission	Controls access permissions in ASP.NET hosted environments.
AspNetHostingPermissionAttribute	Allows security actions for AspNetHostingPermission to be applied to code using declarative security. This class cannot be inherited.
HttpApplication	Defines the methods, properties, and events common to all application objects within an ASP.NET application. This class is the base class for applications defined by the user in the global.asax file.
HttpApplicationState	Enables sharing of global information across multiple sessions and requests within an ASP.NET application.
HttpBrowserCapabilities	Enables the server to gather information on the capabilities of the browser that is running on the client.
HttpCachePolicy	Contains methods for setting cache-specific HTTP headers and for controlling the ASP.NET page output cache.
HttpCacheVaryByHeaders	Provides a type-safe way to set the VaryByHeaders property that identifies the request headers that ASP.NET adds to the Vary HTTP header sent to the client.
HttpCacheVaryByParams	Provides a type-safe way to set the VaryByParams property that identifies the HTTP Get or Post parameters that ASP.NET uses to choose a response from multiple cached responses.
HttpClientCertificate	Provides the client certificate fields issued by the client in response to the server's request for the client's identity.
HttpCompileException	The exception that is thrown when a compiler error occurs.
HttpContext	Encapsulates all HTTP-specific information about an individual HTTP request.
HttpCookie	Provides a type-safe way to create and manipulate individual HTTP cookies.
HttpCookieCollection	Provides a type-safe way to manipulate HTTP cookies.
HttpException	Provides a means of generating HTTP exceptions.
HttpFileCollection	Provides access to and organizes files uploaded by a client.
HttpModuleCollection	Provides a means of indexing and retrieving a collection of IHttpModule objects.
HttpParseException	The exception that is thrown when a parse error occurs.
HttpPostedFile	Provides a way to access individual files that have been uploaded by a client.
HttpRequest	Enables ASP.NET to read the HTTP values sent by a client during a Web request.
HttpRequestValidationException	The exception that is thrown when a potentially dangerous input string is received from the client.
HttpResponse	Encapsulates HTTP response information from an ASP.NET operation .
HttpRuntime	Provides a set of ASP.NET run-time services for the current application.
HttpServerUtility	Provides helper methods for processing Web requests.
HttpStaticObjectsCollection	Provides a static objects collection for the StaticObjects property.
HttpUtility	Provides methods for encoding and decoding URLs when processing Web requests.
HttpWorkerRequest	This abstract class defines the base worker methods and enumerations used by ASP.NET managed code to process requests.
HttpWriter	Provides a TextWriter object that is accessed through the intrinsic HttpResponse object.
ProcessInfo	Provides information on processes currently executing.
ProcessModelInfo	Contains methods that return information about worker processes.
TraceContext	Captures and presents execution details about a Web request. This class cannot be inherited.

Interfaces

Interface	Description
IHttpAsyncHandler	When implemented by a class, defines the contract that HTTP asynchronous handler objects must implement.
IHttpHandler	Defines the contract that ASP.NET implements to synchronously process HTTP Web requests using custom HTTP handlers.
IHttpHandlerFactory	Defines the contract that class factories must implement to create new IHttpHandler objects.
IHttpModule	Provides module initialization and disposal events to the inheriting class.

Delegates

Delegate	Description
BeginEventHandler	Represents the method that handles asynchronous events such as application events. This delegate is called at the start of an asynchronous operation.
EndEventHandler	Represents the method that handles asynchronous events such as application events. This delegate is called by the event source when completion of the asynchronous operation is signaled by a callback to the BeginEventHandler delegate.
HttpCacheValidateHandler	Delegate method that is called when a cached item is validated. Cache items invalidated within the method are treated as cache misses.
HttpWorkerRequest. EndOfSendNotification	Represents the method that notifies callers when sending of the response is complete.

Enumerations

Enumeration	Description
AspNetHostingPermissionLevel
HttpCacheability	Provides enumerated values that are used to set the Cache-Control HTTP header.
HttpCacheRevalidation	Provides enumerated values that are used to set revalidation-specific Cache-Control HTTP headers.
HttpValidationStatus	Provides enumerated values that indicate cache validation status.
ProcessShutdownReason	Provides enumerated values that indicate why a process has shut down.
ProcessStatus	Provides enumerated values that indicate the current status of a process.
TraceMode	Specifies in what order trace messages are emitted into the HTML output of a page.

System.Web Namespace

Classes

Interfaces

Delegates

Enumerations

See Also