DEFINE SESSION IN ASP.NET CODE

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Listing 3.6 shows a page that lets you add and remove strings to the current Session. You might want to use these two methods to conserve Web server resources, especially if you store large objects in Session.

You also can remove everything in the Session object by using the RemoveAll() method. However, you can remove objects by using the Session.Remove() method. You can change the timeout for the Session object by assigning the Timeout property to a certain value, in minutes, such as Session.Timeout = 5 Removing Objects from the Session Objectīecause sessions time out, you don't really need to remove objects from them.

DEFINE SESSION IN ASP.NET CODE

The following code line prints '20' by default: You can find out how long the Session timeout setting is by using the Timeout method. If a user stops hitting your Web site, his Session will time out after 20 minutes of inactivity, by default. Lifetime of the Session ObjectĪ new session is created once for each new browser that hits your ASP.NET Web site. Its default property is the Item collection, which allows you to access the stored items by using the notation. The Session object is of type HTTPSessionState. Databases are a better choice for storing large amounts of state data. You can easily overburden your Web server by storing large amounts of data in Session, especially if your Web site has many users. The answer is that you should avoid storing large amounts of data in session if possible. You might be wondering whether it's appropriate to store large custom objects in Session. The following line would work, however: String strUserName = (String) Session Generates a compiler error, complaining that you can't assign an Object to a String. For instance, String strUserName = Session //error! NET Object type.īecause variables in the Session object are of type Object, cast them to the appropriate type when accessing them.

By default, every variable added to the Session object is of the. The line Session = true Īutomatically creates a new variable called ValidUser (if it doesn't exist already) and sets it to true. You can easily add data to the Session object. We'll explain these different session configurations on Day 18, 'Configuring Internet Applications.' Adding Data to the Session Object You can also offload the storage of session state onto a different server or into a SQL Server database, for 'Web farm' scenarios.

If needed, you can turn off the cookies to instantiate cookieless sessions.

Define session in asp.net