System.Web.HttpRequest

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The System.Web.HttpRequest class (or request intrinsic object) enables access to the HTTP request made by the user. A new request is created each time a user loads a page in his or her browser. Table A.9 shows the properties of the HttpRequest class, and Table A.10 shows its methods .

Table A.9. Properties of the System.Web.HttpRequest Class

Property Name	Description
`AcceptTypes`	Gets an array of client-supported Multipurpose Internet Mail Extensions (MIME) accept types.
`ApplicationPath`	Gets the path for the current application's virtual directory.
`Browser`	Gets a `System.Web.HttpBrowserCapabilities` object that represents the client browser's capabilities.
`ClientCertificate`	Gets the current request's client security certificate. Corresponds to server variables prefixed with `CERT_` .
`ContentEncoding`	Gets a `System.Text.Encoding` object for the client browser's character set.
`ContentLength`	The length, in bytes, of data sent by the client. Corresponds to the `CONTENT_LENGTH` server variable.
`ContentType`	Gets the MIME type of the incoming request.
`Cookies`	Gets the collection of the client's cookies for the current server.
`CurrentExecutionFilePath`	Gets the virtual path of the current request.
`FilePath`	Gets the virtual path of the current request.
`Files`	Gets the collection of files uploaded by the client.
`Filter`	Gets or sets the filter to use when reading the current input stream.
`Form`	Gets a collection of form variables.
`Headers`	Gets a collection of header variables.
`HttpMethod`	Gets the HTTP data transfer method ( `GET` , `POST` , or `HEAD` ) used by the client.
`InputStream`	Provides access to the raw HTTP stream.
`IsAuthenticated`	Gets a value that indicates if the user has been authenticated for the HTTP request.
`IsSecureConnection`	Gets a value that indicates if the HTTP request is secure (over HTTPS). Corresponds to the HTTPS server variable.
`Params`	Gets a combined collection of `QueryString` , `Form` , `ServerVariables` , and `Cookies` items.
`Path`	Gets the virtual path of the current request. Corresponds to `PATH_INFO` server variable.
`PathInfo`	Gets additional path information for a resource.
`PhysicalApplicationPath`	The physical file system path of the current application's root directory. Corresponds to the `APPL_PHYSICAL_PATH` server variable.
`PhysicalPath`	Gets the physical file path associated with the requested URL.
`QueryString`	Gets the collection of querystring variables.
`RawUrl`	Gets the raw URL of the current request.
`RequestType`	Gets the HTTP data transfer method ( `GET` , `POST` , or `HEAD` ) used by the client. Corresponds to the `REQUEST_METHOD` server variable.
`ServerVariables`	Returns a collection of web server variables.
`TotalBytes`	Gets the number of bytes in the current input stream.
`Url`	Returns a `System.Uri` object that contains information about the URL of the current request.
`UrlReferrer`	Returns the URL from which this page was redirected. Corresponds to the `HTTP_REFERRER` server variable.
`UserAgent`	Gets the raw user agent string of the client browser. Corresponds to the `HTTP_USER_AGENT` server variable.
`UserHostAddress`	Gets the IP host address of the remote client. Corresponds to the `REMOTE_ADDR` server variable.
`UserHostName`	Gets the DNS name of the remote client. Corresponds to `HTTP_HOST` server variable.
`UserLanguages`	Retrieves a string array of client language preferences.

Table A.10. Methods of the System.Web.HttpRequest Class

Method Name	Description
`BinaryRead`	Reads a specified number of bytes from the input stream.
`MapImageCoordinates`	Maps an incoming image-field form parameter to appropriate X-Y coordinate values.
`MapPath`	Maps the specified virtual path to a physical path.
`SaveAs`	Saves an HTTP request to disk.

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