Chapter 5. Error Handling for the User Interface

Chapter 5. Error Handling for the User Interface

Terms you'll need to understand:

• Application.Error event

• Custom error pages

• Custom exceptions

• Exception

• Page.Error event

• The catch block

• The finally block

• The throw statement

• The try block

• Unhandled exceptions

Techniques you'll need to master:

• Knowing how to handle exceptions using the try - catch - finally blocks

• Knowing how to create custom exception classes and custom error messages; learn to implement them in a program

• Knowing how to configure custom error pages in the web.config file

• Experimenting with code that performs error handling at the Page_Error() or Application_Error() event handlers

Exception handling helps you in creating robust applications. Fortunately, exception handling is an integral part of the .NET Framework. The framework classes, as well as user-defined classes, throw exception objects to indicate unexpected problems in the code. In this chapter, you will learn how to handle exceptions in ASP.NET Web applications.