Server operation cookie [2]

The following three classes are used to operate cookies on the server:

Httpcookie, httpresponse, httprequest

Httpcookie:

Attribute	Description	Example
Domain	Obtain or set the domain associated with this cookie
Expires	Get or set the domain expiration time
Haskeys	Obtains a value that indicates whether the cookie has a subkey.
HTTPOnly	Gets or sets a value that specifies whether a cookie can be accessed through a client script.
Item	Httpcookie. Values attributes shortcut
Name	Get or set the cookie name
Path	Obtains or sets the virtual path to be transmitted with the current cookie.
Secure	Gets or sets a value indicating whether to use SSL to transmit cookies.
Value	Obtains or sets the cookie value.
Values	Obtains the set of key-value pairs contained in a cookie object.	Cookie. Values ["username"]

1. Add cookie

    Public Partial Class Cookie_default: system. Web. UI. Page { Protected   Void Page_load ( Object Sender, eventargs e ){ // Create a cookie Httpcookie cookie = New Httpcookie (" User "); // Encode Chinese Characters Cookie [" Username "] = Httputility. urlencode (" Zhang San "); Cookie [" Password "] =" Zhangsan "; // Note: the cookie cannot be added if it is missing Cookie. expires = datetime. Now. adddays (2 ); // Add cookie Response. Cookies. Add (cookie );}}

3. Read cookie

     Public  partial  class  cookie_default: system. web. UI. page { protected   void  page_load ( Object  sender, eventargs e) { // obtain cookie  httpcookie cookie = request. cookies [" User "];  // decode Chinese   // output:   // zhangsan   // zhangsan  response. write (httputility. urldecode (cookie [" username "]) + " 
    " + Cookie [" password "]);} 

5. modify cookie

     Public  partial  class  cookie_default: system. web. UI. page { protected   void  page_load ( Object  sender, eventargs e) {response. cookies [" User "] [" username "] = httputility. urlencode (" Li Si ");  // decode Chinese   // output:   // Li Si  response. write (httputility. urldecode (request. cookies [" User "] [" username "]) ;}

7. Delete cookie

     Public  partial  class  cookie_default: system. web. UI. page { protected   void  page_load ( Object  sender, eventargs e) { // when the cookie expires, the client can automatically delete the cookie  response. cookies [" User "]. expires = datetime. now. adddays (-1) ;}}