ASP. MVC5 Summary (iii) session and cookie of common technical analysis in landing

1.session mechanism

Session mechanism is on the server side to maintain the state of the scheme, in the system landing, we often use the session to store some user login important information, and this information can not exist in the cookie.

When the amount of traffic increases, the server performance is compared.

How to write a session

1  Public Static void Writesession (string  key, T value)2{3if  (key). IsEmpty ())4return; 5 Httpcontext.current.session[key] = value; 6 }

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How to read the session

 1  public  static  string  GetSession (string   key)  2  3  if   (key. IsEmpty ())  4  return  string  . Empty;  5  as  string   6 } 

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method to delete the specified session

1  Public Static void Removesession (string  key)2        {3             if  (key). IsEmpty ())4                 return; 5             HttpContext.Current.Session.Contents.Remove (key); 6         }

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2.cookie mechanism

The cookie mechanism adopts the scheme of keeping state on the client, when we make the system landing, we will store the basic information of the user to the user's browser, we will use the cookie, but it can save 4K data.

Ways to write cookies

1  Public Static voidWritecookie (stringStrName,stringstrvalue)2         {3HttpCookie cookie =Httpcontext.current.request.cookies[strname];4             if(Cookie = =NULL)5             {6Cookie =NewHttpCookie (strName);7             }8Cookies. Value =strvalue;9 HttpContext.Current.Response.AppendCookie (cookie);Ten}

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Ways to read cookies

1  Public Static stringGetCookie (stringstrName)2         {3             if(HttpContext.Current.Request.Cookies! =NULL&& Httpcontext.current.request.cookies[strname]! =NULL)4             {5                 returnHttpcontext.current.request.cookies[strname]. Value.tostring ();6             }7             return "";8}

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Ways to delete cookies

1  Public Static void Removecookie (string  cookiesname)2        {3             new  HttpCookie (Cookiesname.trim ()); 4             Objcookie.expires = DateTime.Now.AddYears (-5); 5             HttpContext.Current.Response.Cookies.Add (Objcookie); 6         }

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ASP. MVC5 Summary (iii) session and cookie of common technical analysis in landing