Asp net where is session data stored

Session variables are created by referring to the session variable by name. You do not have to declare a session variable or explicitly add it to the collection. The following example shows how to create session variables in an ASP.

NET page for the first and last name of a user, and set them to values retrieved from TextBox controls. Session variables can be any valid. NET Framework type. The following example stores an ArrayList object in a session variable named StockPicks. The value returned by the StockPicks session variable must be cast to the appropriate type when you retrieve it from the SessionStateItemCollection.

When you use a session-state mode other than InProc , the session-variable type must be either a primitive. NET type or serializable. This is because the session-variable value is stored in an external data store.

For more information, see Session-State Modes. Sessions are identified by a unique identifier that can be read by using the SessionID property. When session state is enabled for an ASP. NET application, each request for a page in the application is examined for a SessionID value sent from the browser. NET starts a new session and the SessionID value for that session is sent to the browser with the response. By default, SessionID values are stored in a cookie.

A session is considered active as long as requests continue to be made with the same SessionID value. If the time between requests for a particular session exceeds the specified time-out value in minutes, the session is considered expired. Requests made with an expired SessionID value result in a new session. A malicious user could get access to the session of another user by obtaining the SessionID value and including it in requests to the server.

If you are storing sensitive information in session state, it is recommended that you use SSL to encrypt any communication between the browser and server that includes the SessionID value.

By default, the SessionID value is stored in a non-expiring session cookie in the browser. However, you can specify that session identifiers should not be stored in a cookie by setting the cookieless attribute to true in the sessionState section of the Web. The following example shows a Web. NET application to use cookieless session identifiers. NET to include the unique session ID lit3py55t21z5v55vlm25s However, there are two exceptions to this same ASP. NET session ID behavior: - If the user has used the same browser instance to request another page that uses the session state, you will get the same session ID every time.

NET will save the session state even when it is empty. A: Yes! Here is our article on how to do this in either direction using two "intermediate" pages. And here is an article on how to do it with SQL Server. So make sure your objects are serializable and their classes must be marked as so.

If not, the session state will not be saved successfully. In v1, there is a bug which makes the problem happen unnoticed. Redirect and Server. Thus, there is no HttpRequest associted when that happens. That is why Response. Redirect or Server. Transferdoes not make sense and will not work. A: No, because this event is not associated with any request. Q: Will my session state be saved when my page hit an error? A: No. Unless you call Server. Web frameworks are the tools that developers typically use to create web sites.

They may serve up dynamically generated content e. HTML , static content e. NET Core website. NET Core installed, there are three steps to get the example running:.

The rest of this tutorial walks through the steps in building the application. You can follow along by browsing the source code or trying to recreate the sample application yourself.

Next, install the Couchbase. Session package using NuGet. Session in the Package Manager Console. NET Core where and how to use Couchbase as a session store. Recall that I created a bucket named "sessionstore" earlier. You should also know the location and credentials for your Couchbase cluster. To tell ASP.

NET Core application. In the above example, I hardcoded the cluster location and credentials, but you can also use a config file.

NET Core to use Couchbase as a cache. This is a prerequisite to using the session store, but it can also be used by itself for any caching use cases you have. Finally, the last part of configuration is to tell ASP.

NET Core to use Couchbase for session storage. You can specify options like session timeout and cookie name here. In this example, session will timeout after not being used for 20 minutes, and the corresponding cookie will be called ". At this point, your ASP. NET Core application is ready to read and write session store.

NET Core is now ready. In the sample application, there are three different types of session objects that a given user may store: User, Shopping Cart, Location. User stores username as well as SMS number.

Shopping Cart stores items, prices, and quantities of items that a user will purchase. I chose to model these as three different session objects. In your application, you may want to break up different areas of session, as not all users will need every session object. For instance, a customer who is visiting your site may need browse-back and site activity tracking data, but may not need any shopping cart data until they put the first item into their cart.

To store an item in session, use HttpContext. To retrieve an item from session, use HttpContext. When storing data, the example is using an anonymous type. This could be replaced with a defined C type instead. When retrieving data, the example is using dynamic.

If using a type to set data, you can also use that same type when getting. Finally, though session data will be erased automatically after 20 minutes, you can also elect to clear session data at any time by using HttpContext. Remove :. That is all. Now you can start ASP. NET application and session data will be stored out of application process, in State Server.

How to use Session State on remote machine Storing session data on remote machine is more scalable option, since web server's memory stays intact and it's not used for sessions. By default, Session State service will not allow connections from remote servers. Default value is zero which means that State Server doesn't allow remove connections.

Default value is desirable if you have only one web server and it is on same computer as state server. To allow remote connections, change its value to 1. Be aware that, if AllowRemoteConnections registry key is set to 1, State Server will talk to anyone, not just your desired web server. Due to security reasons, you have to disallow access from any computer except web servers, especially if State Server is connected to Internet.

How to use Session State server on web farm? There are additional steps if you use State Server on multiple servers web farm. You need to check machineKey and application path on each server. Also, application path in IIS metabase should be same on every server. By default, State Server will listen on port Whichever port you choose, be sure that it is not open for Internet, due to security reasons.

State Server should listen only your web servers. InProc mode allows storing of any. Net type. But, if State Server is used, all objects that will be stored in session variables must be serializable.