"ADO." NET Foundation-session "Session Basic Application

Objects that store state on the server: Session and Application

Objects in the client store state: Cookies

1.Session: Each independent browser will create a separate session, not a computer a session

Session stored data is shared in the current session, and closing sessions disappears

Features: Session within 20 minutes if there is no session operation, it will be automatically released

Syntax: (1) Use the Session value: session["key Name"] = value; Value, which is not just a string, it can be an object.

(2) value from Session: type variable name = (cast type name) session["key Name"]

(3) Release Session: Release a session:session["key name"]=NULL;

Release all Session:Session.clear ();

Automatic release: 20 minutes

2. Cookies: Protect client memory or hard disk

A temporary cookie is present in the browser memory and persistent cookie is present in the browser-related cookie directory on the computer's hard disk.

Set cookies

New Cookie Object
HttpCookie cookie_name = new HttpCookie ("UID");
Assign value
Cookie_name. Value = UID;
Write to Cookie Inside
Response.appendcookie (Cookie_name);

In use interface: Read cookie
request.cookies["UID"]. Value.tostring ();

5.QueryString Transmit Value

Write on the source page: Response.Redirect ("main.aspx" (the page to open) uid= "+uid+" &pwd= "+pwd (to transfer past values);//Pass the value over when opening a new page
On the target page: request["UID"]. ToString ();

7. Jump Page Mode:

1.response.redirect ("http://www.baidu.com"); Redirect to jump to any page
2.server.transfer ("main.aspx"); You can only jump to sites in the root directory of the site

"ADO." NET Foundation-session "Session Basic Application