HttpRequestHeader Enumeration
The HTTP headers that may be specified in a client request.
Assembly: System (in System.dll)
| Member name | Description | |
|---|---|---|
| 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. | |
| Allow | The Allow header, which specifies the set of HTTP methods supported. | |
| Authorization | The Authorization header, which specifies the credentials that the client presents in order to authenticate itself to the server. | |
| 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. | |
| 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. | |
| ContentLength | The Content-Length header, which specifies the length, in bytes, 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. | |
| ContentType | The Content-Type header, which specifies the MIME type of the accompanying body data. | |
| Cookie | The Cookie header, which specifies cookie data presented to the server. | |
| Date | The Date header, which specifies the date and time at which the request originated. | |
| Expect | The Expect header, which specifies particular server behaviors that are required by the client. | |
| Expires | The Expires header, which specifies the date and time after which the accompanying body data should be considered stale. | |
| 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. | |
| KeepAlive | The Keep-Alive header, which specifies a parameter used into order to maintain a persistent connection. | |
| LastModified | The Last-Modified header, which specifies the date and time at which the accompanying body data was last modified. | |
| MaxForwards | The Max-Forwards header, which specifies an integer indicating the remaining number of times that this request may be forwarded. | |
| Pragma | The Pragma header, which specifies implementation-specific directives that might apply to any agent along the request/response chain. | |
| ProxyAuthorization | The Proxy-Authorization header, which specifies the credentials that the client presents in order to authenticate itself to a proxy. | |
| 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. | |
| Referer | The Referer header, which specifies the URI of the resource from which the request URI was obtained. | |
| Te | The TE header, which specifies the transfer encodings that are acceptable for the response. | |
| 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. | |
| Translate | The Translate header, a Microsoft extension to the HTTP specification used in conjunction with WebDAV functionality. | |
| Upgrade | The Upgrade header, which specifies additional communications protocols that the client supports. | |
| UserAgent | The User-Agent header, which specifies information about the client agent. | |
| 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. |
The appropriate contents of various headers are described in detail in the HTTP/1.1 specification, available at rfc2616.
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1