Asp net session timeout what is the order of precedence

ASP.NET Session Timeout and Order of Precedence

ASP.NET is a powerful programming language that allows to dynamic web applications. One important aspect of ASP.NET is session management, which allows the to maintain state information for each user session. However, may be situations where you need to control the session timeout and understand the order of precedence for different settings.

By default, ASP.NET session timeout is set to 20 minutes. This means that if a user is inactive for more than 20 minutes, their session will expire and they will need to log in . However, you can customize this timeout value based on your application's requirements.

To set the session timeout, you can use the Session.Timeout property in your ASP.NET code. For example:


Session.Timeout = 30; // Set session timeout to 30 minutes

This code snippet sets the session timeout to 30 minutes. It is important to note that this value is specified in minutes.

Order of Precedence for Session Timeout

When it comes to session timeout, there are multiple settings that can affect the actual timeout value. These settings follow a specific order of precedence, which determines the timeout value.

The order of precedence for session timeout settings is as follows:

  1. Machine.config
  2. Web.config
  3. .asax

The Machine.config file is a system-level configuration file that applies to all ASP.NET applications on the server. If the session timeout is specified in the Machine.config file, it will be the default value for all applications unless overridden in the Web.config or Global.asax files.

The Web.config file is an application-level configuration file that applies to a specific ASP.NET application. If the session timeout is specified in the Web.config file, it will override the value specified in the Machine.config file.

The Global.asax file is a file that contains application-level events and code. If the session timeout is set programmatically in the Global.asax file, it will override the values specified in both the Machine.config and Web.config files.

Let's consider an example to understand the order of precedence:


// Machine.config


// Web.config


// Global.asax
void Application_Start( sender, EventArgs e)
{
    Session.Timeout = 40;
}

In this example, the session timeout value will be 40 minutes. Even though the Machine.config and Web.config files timeout values of 20 and 30 minutes respectively, the value set in the Global.asax file takes precedence.

It is important to note that the session timeout value specified in the Global.asax file will only be applied if the session is actually used in the application. If the session is not used, the timeout value specified in the Web.config file will be used.

Understanding the order of precedence for session timeout settings is crucial for managing session timeouts effectively in your ASP.NET applications. By customizing the timeout value based on your application's requirements, you can provide a better user experience and ensure the security of your application.

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