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WebRequest Class

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Makes a request to a Uniform Resource Identifier (URI). This is an abstract class.

Namespace:  System.Net
Assembly:  System.Http (in System.Http.dll)

public abstract class WebRequest : MarshalByRefObject, 
	IDisposable

The WebRequest type exposes the following members.

  NameDescription
Protected methodWebRequestInitializes a new instance of the WebRequest class.
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  NameDescription
Public propertyConnectionGroupNameWhen overridden in a descendant class, gets or sets the name of the connection group for the request.
Public propertyContentLengthWhen overridden in a descendant class, gets or sets the content length of the request data being sent.
Public propertyContentTypeWhen overridden in a descendant class, gets or sets the content type of the request data being sent.
Public propertyStatic memberDefaultWebProxyGets or sets the global HTTP proxy.
Public propertyHeadersWhen overridden in a descendant class, gets or sets the collection of header name/value pairs associated with the request.
Public propertyMethodWhen overridden in a descendant class, gets or sets the protocol method to use in this request.
Public propertyProxyWhen overridden in a descendant class, gets or sets the network proxy to use to access this Internet resource.
Public propertyRequestUriWhen overridden in a descendant class, gets the URI of the Internet resource associated with the request.
Public propertyTimeoutGets or sets the length of time, in milliseconds, before the request times out.
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  NameDescription
Public methodStatic memberCreate(String)Initializes a new WebRequest instance for the specified URI scheme.
Public methodStatic memberCreate(Uri)Initializes a new WebRequest instance for the specified URI scheme.
Public methodDispose()()()()Releases the resources used by the HttpWebRequest.
Protected methodDispose(Boolean)Releases the unmanaged resources used by the HttpWebRequest and optionally releases the managed resources.
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizePerforms clean up operations. (Overrides Object..::..Finalize()()()().)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetRequestStreamWhen overridden in a descendant class, returns a Stream for writing data to the Internet resource.
Public methodGetResponseWhen overridden in a descendant class, returns a response to an Internet request.
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodStatic memberRegisterPrefixRegisters a WebRequest descendant for the specified URI.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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WebRequest is the abstract base class for the .NET Micro Framework's request/response model for accessing data from the Internet. An application that uses the request/response model can request data from the Internet in a protocol-agnostic manner, in which the application works with instances of the WebRequest class while protocol-specific descendant classes carry out the details of the request.

Requests are sent from an application to a particular URI, such as a Web page on a server. The URI determines the proper descendant class to create from a list of WebRequest descendants registered for the application. WebRequest descendants are typically registered to handle a specific protocol, such as HTTP or FTP, but can be registered to handle a request to a specific server or path on a server.

The WebRequest class throws a WebException when errors occur while accessing an Internet resource. The Status property is one of the WebExceptionStatus values that indicates the source of the error. When Status is WebExceptionStatus..::..ProtocolError, the Response property contains the WebResponse received from the Internet resource.

Because the WebRequest class is an abstract class, the actual behavior of WebRequest instances at run time is determined by the descendant class returned by Create method. For more information about default values and exceptions, see the documentation for the descendant classes, such as HttpWebRequest and FileWebRequest.

NoteNote

Use the Create method to initialize new WebRequest instances. Do not use the WebRequest constructor.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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