Partilhar via

  • Artigo

HttpRequestHeader Enumeration

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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
Supported by Silverlight for Windows Phone CacheControl The Cache-Control header, which specifies directives that must be obeyed by all cache control mechanisms along the request/response chain.
Supported by Silverlight for Windows Phone Connection The Connection header, which specifies options that are desired for a particular connection.
Supported by Silverlight for Windows Phone Date The Date header, which specifies the date and time at which the request originated.
Supported by Silverlight for Windows Phone KeepAlive The Keep-Alive header, which specifies a parameter used into order to maintain a persistent connection.
Supported by Silverlight for Windows Phone Pragma The Pragma header, which specifies implementation-specific directives that might apply to any agent along the request/response chain.
Supported by Silverlight for Windows Phone Trailer The Trailer header, which specifies the header fields present in the trailer of a message encoded with chunked transfer-coding.
Supported by Silverlight for Windows Phone TransferEncoding The Transfer-Encoding header, which specifies what (if any) type of transformation that has been applied to the message body.
Supported by Silverlight for Windows Phone Upgrade The Upgrade header, which specifies additional communications protocols that the client supports.
Supported by Silverlight for Windows Phone Via The Via header, which specifies intermediate protocols to be used by gateway and proxy agents.
Supported by Silverlight for Windows Phone Warning The Warning header, which specifies additional information about that status or transformation of a message that might not be reflected in the message.
Supported by Silverlight for Windows Phone Allow The Allow header, which specifies the set of HTTP methods supported.
Supported by Silverlight for Windows Phone ContentLength The Content-Length header, which specifies the length, in bytes, of the accompanying body data.
Supported by Silverlight for Windows Phone ContentType The Content-Type header, which specifies the MIME type of the accompanying body data.
Supported by Silverlight for Windows Phone ContentEncoding The Content-Encoding header, which specifies the encodings that have been applied to the accompanying body data.
Supported by Silverlight for Windows Phone ContentLanguage The Content-Langauge header, which specifies the natural language(s) of the accompanying body data.
Supported by Silverlight for Windows Phone ContentLocation The Content-Location header, which specifies a URI from which the accompanying body may be obtained.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone ContentRange The Content-Range header, which specifies where in the full body the accompanying partial body data should be applied.
Supported by Silverlight for Windows Phone Expires The Expires header, which specifies the date and time after which the accompanying body data should be considered stale.
Supported by Silverlight for Windows Phone LastModified The Last-Modified header, which specifies the date and time at which the accompanying body data was last modified.
Supported by Silverlight for Windows Phone Accept The Accept header, which specifies the MIME types that are acceptable for the response.
Supported by Silverlight for Windows Phone AcceptCharset The Accept-Charset header, which specifies the character sets that are acceptable for the response.
Supported by Silverlight for Windows Phone AcceptEncoding The Accept-Encoding header, which specifies the content encodings that are acceptable for the response.
Supported by Silverlight for Windows Phone AcceptLanguage The Accept-Langauge header, which specifies that natural languages that are preferred for the response.
Supported by Silverlight for Windows Phone Authorization The Authorization header, which specifies the credentials that the client presents in order to authenticate itself to the server.
Supported by Silverlight for Windows Phone Cookie The Cookie header, which specifies cookie data presented to the server.
Supported by Silverlight for Windows Phone Expect The Expect header, which specifies particular server behaviors that are required by the client.
Supported by Silverlight for Windows Phone From The From header, which specifies an Internet E-mail address for the human user who controls the requesting user agent.
Supported by Silverlight for Windows Phone Host The Host header, which specifies the host name and port number of the resource being requested.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone MaxForwards The Max-Forwards header, which specifies an integer indicating the remaining number of times that this request may be forwarded.
Supported by Silverlight for Windows Phone ProxyAuthorization The Proxy-Authorization header, which specifies the credentials that the client presents in order to authenticate itself to a proxy.
Supported by Silverlight for Windows Phone Referer The Referer header, which specifies the URI of the resource from which the request URI was obtained.
Supported by Silverlight for Windows Phone 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.
Supported by Silverlight for Windows Phone Te The TE header, which specifies the transfer encodings that are acceptable for the response.
Supported by Silverlight for Windows Phone Translate The Translate header, a Microsoft extension to the HTTP specification used in conjunction with WebDAV functionality.
Supported by Silverlight for Windows Phone 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.