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WebPages Global

The Global.asax file is a special file in ASP.NET WebPages projects that allows you to define global-level application logic, such as application startup events, session management, and error handling.

Key Topics

What is Global.asax?

The Global.asax file serves as a central location for handling application-level events, such as application start, end, session start, and error logging. It helps manage the lifecycle and behavior of your web application.

Common Events in Global.asax

  • Application_Start: Triggered when the application starts.
  • Application_End: Triggered when the application shuts down.
  • Session_Start: Triggered when a new session is created.
  • Error: Triggered when an unhandled error occurs.

Example Usage

Example

protected void Application_Start()
{
    // Code that runs on application startup
    Application["Visits"] = 0;
}

protected void Session_Start()
{
    // Increment the visit count for each new session
    Application["Visits"] = (int)Application["Visits"] + 1;
}

Output

Application visits counter increments with each new session.

Explanation: In this example, the Application_Start event initializes a global variable to track the number of visits. The Session_Start event increments this counter whenever a new session begins.

Key Takeaways

  • The Global.asax file centralizes application-level logic.
  • Common events include Application_Start, Session_Start, and Error.
  • It is useful for global settings, application state, and error management.
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