session-variables

问题 I am new to ASP.NET MVC. I have used PHP before and it was easy to create a session and select user records based on the current session variables. I have looked everywhere on the Internet for a simple step-by-step tutorial that can show me how to create and use sessions in my C# ASP.NET MVC 4 application. I want to create a session with user variables that I can access from anywhere in my controllers and be able to use the variables in my LINQ queries. -Thanks in advance! 回答1: Try //adding

问题 I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn\'t have session started. Therefore when I have session_start() on this script I sometimes get the error message for \"session already started\". For that I\'ve put these lines: if(!isset($_COOKIE[\"PHPSESSID\"])) { session_start(); } but this time I got this warning message: Notice: Undefined variable: _SESSION Is there a better way to check if session has already started? If