ASP.NET 4 Unleashed

Debugging and Tracing ASP.NET Pages

The sad fact of life is that you spend the majority of your development time when building applications debugging the application. In this section, you learn how to get detailed error messages when developing ASP.NET pages. You also learn how you can display custom trace messages that you can use when debugging a page.

Debugging ASP.NET Pages

If you need to view detailed error messages when you execute a page, you need to enable debugging for either the page or your entire application. You can enable debugging for a page by adding a Debug="true" attribute to the <%@ Page %> directive. For example, the page in Listing 1.18 has debugging enabled.

Listing 1.18. ShowError.aspx

When you open the page in Listing ...