How to use sessions in an ASP NET MVC 4 application

Question

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

User · Answer

U can store any value in session like Session["FirstName"] = FirstNameTextBox.Text; but i will suggest u to take as static field in model assign value to it and u can access that field value any where in application. U don't need session. session should be avoided.

public class Employee
{
   public int UserId { get; set; }
   public string EmailAddress { get; set; }
   public static string FullName { get; set; }
}

on controller - Employee.FullName = "ABC"; Now u can access this full Name anywhere in application.

User · Answer

This is how session state works in ASP NET and ASP NET MVC   ASP NET Session State Overview  Basically  you do this to store a value in the Session object   Session  FirstName     FirstNameTextBox Text    To retrieve the value   var firstName   Session  FirstName

User · Answer

You can store any kind of data in a session using   Session  VariableName   value    This variable will last 20 mins or so

User · Answer

Due to the stateless nature of the web  sessions are also an extremely useful way of persisting objects across requests by serialising them and storing them in a session   A perfect use case of this could be if you need to access regular information across your application  to save additional database calls on each request  this data can be stored in an object and unserialised on each request  like so   Our reusable  serializable object    Serializable  public class UserProfileSessionData       public int UserId   get  set         public string EmailAddress   get  set         public string FullName   get  set        Use case   public class LoginController   Controller         HttpPost      public ActionResult Login LoginModel model                if  ModelState IsValid                        var profileData   new UserProfileSessionData                   UserId   model UserId                  EmailAddress   model EmailAddress                  FullName   model FullName                            this Session  UserProfile     profileData                       public ActionResult LoggedInStatusMessage                 var profileData   this Session  UserProfile   as UserProfileSessionData              From here you could output profileData FullName to a view and         save yourself unnecessary database calls               Once this object has been serialised  we can use it across all controllers without needing to create it or query the database for the data contained within it again   Inject your session object using Dependency Injection  In a ideal world you would  program to an interface  not implementation  and inject your serializable session object into your controller using your Inversion of Control container of choice  like so  this example uses StructureMap as it s the one I m most familiar with    public class WebsiteRegistry   Registry       public WebsiteRegistry                 this For lt IUserProfileSessionData gt    HybridHttpOrThreadLocalScoped   Use      gt  GetUserProfileFromSession                   public static IUserProfileSessionData GetUserProfileFromSession                 var session   HttpContext Current Session          if  session  UserProfile      null                        return session  UserProfile   as IUserProfileSessionData                        Create new empty session object            session  UserProfile     new UserProfileSessionData             return session  UserProfile   as IUserProfileSessionData            You would then register this in your Global asax cs file   For those that aren t familiar with injecting session objects  you can find a more in-depth blog post about the subject here   A word of warning   It s worth noting that sessions should be kept to a minimum  large sessions can start to cause performance issues   It s also recommended to not store any sensitive data in them  passwords  etc

User · Answer

Try    adding data to session   assuming the method below will return list of Products  var products Db GetProducts       Store the products to a session  Session  products   products     To get what you have stored to a session  var products Session  products   as List lt Product gt      to clear the session value  Session  products   null

[asp.net-mvc] How to use sessions in an ASP.NET MVC 4 application?

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