asp.net Ninghua bis: asp.net built-in objects

Today I will mainly introduce the following knowledge points:

Request
Response
Server
Session
Cookie
Application
<%%>及<%=%>表达式

To be exact, ASP.net does not have built-in objects this said, JSP really put request, response these as a JSP built-in objects, here is just borrowed a JSP of the argument just. Many of the above are objects that you can use when doing asp.net development without new (there are also many, in asp.net, all pages are inherited from the System.Web.UI.Page class, which is referred to as the properties of the page class).

In the center of the web is a Web server that handles the HTTP requests of the client. Because HTTP is a stateless protocol, it does not remember the last time anyone asked for it, not actively ask the client, only when the client actively requested, the server will respond.

Request

Request encapsulates the client solicitation information. The common properties of the request are as follows:

Property name	Value type	Description
Applicationpath	String	Gets the root path of the requested resource on the site
ContentEncoding	Encoding	Set the encoding of the request object
Cookies	HttpCookieCollection	A collection of cookies sent by the client to the server
QueryString	NameValueCollection	Collection of query strings for the current request
Urlreferrer	Uri	Gets which URL the user jumps to the current page

Response

The response represents the server response object. Each time a client makes a request, the server uses a response object to process the request, and after the request is processed, the server destroys the corresponding object so that it can continue to accept other customer service requests.

Response Common properties are as follows:

Property name	Value type	Description
Charset	String	Represents the character set used by the output stream
ContentEncoding	Encoding	Set the encoding of the output stream
ContentLength	Int	byte size of output stream
ContentType	String	HTTP MIME type of output stream
Cookies	HttpCookieCollection	A collection of cookies sent by the server to the client
Output	TextWriter	The character output stream of the server response object
Redirectlocation	String	REDIRECT the current request

Response Common methods

Property name	return value type	Description
AppendCookie	void	Adds a cookie to the cookie collection of the Response object
Clear	void	Empty all content output in the buffer
Close	void	Close the current server to the client connection
End	void	Terminates the response and sends the output from the buffer to the client
Redirect	void	REDIRECT Current request