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11/18/2011

HttpRequestHeader Enumeration

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The HTTP headers that may be specified in a client request.

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

Syntax

'Declaration
Public Enumeration HttpRequestHeader

public enum HttpRequestHeader

Members

	Member name	Description
	CacheControl	The Cache-Control header, which specifies directives that must be obeyed by all cache control mechanisms along the request/response chain.
	Connection	The Connection header, which specifies options that are desired for a particular connection.
	Date	The Date header, which specifies the date and time at which the request originated.
	KeepAlive	The Keep-Alive header, which specifies a parameter used into order to maintain a persistent connection.
	Pragma	The Pragma header, which specifies implementation-specific directives that might apply to any agent along the request/response chain.
	Trailer	The Trailer header, which specifies the header fields present in the trailer of a message encoded with chunked transfer-coding.
	TransferEncoding	The Transfer-Encoding header, which specifies what (if any) type of transformation that has been applied to the message body.
	Upgrade	The Upgrade header, which specifies additional communications protocols that the client supports.
	Via	The Via header, which specifies intermediate protocols to be used by gateway and proxy agents.
	Warning	The Warning header, which specifies additional information about that status or transformation of a message that might not be reflected in the message.
	Allow	The Allow header, which specifies the set of HTTP methods supported.
	ContentLength	The Content-Length header, which specifies the length, in bytes, of the accompanying body data.
	ContentType	The Content-Type header, which specifies the MIME type of the accompanying body data.
	ContentEncoding	The Content-Encoding header, which specifies the encodings that have been applied to the accompanying body data.
	ContentLanguage	The Content-Langauge header, which specifies the natural language(s) of the accompanying body data.
	ContentLocation	The Content-Location header, which specifies a URI from which the accompanying body may be obtained.
	ContentMd5	The Content-MD5 header, which specifies the MD5 digest of the accompanying body data, for the purpose of providing an end-to-end message integrity check.
	ContentRange	The Content-Range header, which specifies where in the full body the accompanying partial body data should be applied.
	Expires	The Expires header, which specifies the date and time after which the accompanying body data should be considered stale.
	LastModified	The Last-Modified header, which specifies the date and time at which the accompanying body data was last modified.
	Accept	The Accept header, which specifies the MIME types that are acceptable for the response.
	AcceptCharset	The Accept-Charset header, which specifies the character sets that are acceptable for the response.
	AcceptEncoding	The Accept-Encoding header, which specifies the content encodings that are acceptable for the response.
	AcceptLanguage	The Accept-Langauge header, which specifies that natural languages that are preferred for the response.
	Authorization	The Authorization header, which specifies the credentials that the client presents in order to authenticate itself to the server.
	Cookie	The Cookie header, which specifies cookie data presented to the server.
	Expect	The Expect header, which specifies particular server behaviors that are required by the client.
	From	The From header, which specifies an Internet E-mail address for the human user who controls the requesting user agent.
	Host	The Host header, which specifies the host name and port number of the resource being requested.
	IfMatch	The If-Match header, which specifies that the requested operation should be performed only if the client's cached copy of the indicated resource is current.
	IfModifiedSince	The If-Modified-Since header, which specifies that the requested operation should be performed only if the requested resource has been modified since the indicated data and time.
	IfNoneMatch	The If-None-Match header, which specifies that the requested operation should be performed only if none of client's cached copies of the indicated resources are current.
	IfRange	The If-Range header, which specifies that only the specified range of the requested resource should be sent, if the client's cached copy is current.
	IfUnmodifiedSince	The If-Unmodified-Since header, which specifies that the requested operation should be performed only if the requested resource has not been modified since the indicated date and time.
	MaxForwards	The Max-Forwards header, which specifies an integer indicating the remaining number of times that this request may be forwarded.
	ProxyAuthorization	The Proxy-Authorization header, which specifies the credentials that the client presents in order to authenticate itself to a proxy.
	Referer	The Referer header, which specifies the URI of the resource from which the request URI was obtained.
	Range	The Range header, which specifies the the sub-range(s) of the response that the client requests be returned in lieu of the entire response.
	Te	The TE header, which specifies the transfer encodings that are acceptable for the response.
	Translate	The Translate header, a Microsoft extension to the HTTP specification used in conjunction with WebDAV functionality.
	UserAgent	The User-Agent header, which specifies information about the client agent.

Remarks

The appropriate contents of various headers are described in detail in the HTTP 1.1 specification, available at http://www.w3.org/Protocols/rfc2616/rfc2616.html.

Information on restricted headers are discussed in detail in the documentation for the WebHeaderCollection class

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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