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ASP.NET offers significant improvements over ASP in the areas of performance, state management, scalability, configuration, deployment, security, output cache control, Web farm support, and XML Web service infrastructure.

If you have ASP development skills, the new ASP.NET programming model will seem very familiar to you. However, the ASP object model has undergone significant changes to make it more structured and object-oriented, so most existing ASP pages will have to be modified to some extent in order to run under ASP.NET. Major changes to Visual Basic as well mean that existing ASP pages written with Visual Basic Scripting Edition typically will not port directly to ASP.NET. In most cases, though, the necessary changes will involve only a few lines of code.

Most developers will probably choose to rewrite existing ASP applications to gain the performance, readability, and maintainability improvements of the new development environment. But because a Web application can contain both ASP and ASP.NET pages, the conversion does not necessarily have to be carried out on all pieces of the entire Web application at once.

ASP and ASP.NET can run side by side on an Internet Information Services (IIS) Web server without interference. Only files with an .aspx file name extension are processed by ASP.NET; files with an .asp file name extension will continue to be processed by the existing ASP engine. You should be aware, however, that session state and application state are not shared between ASP and ASP.NET pages.

In This Section

Structural Compatibility (ASP and ASP.NET Web Pages)

Provides information on the differences in syntax and class structure between ASP pages and ASP.NET pages.

COM Component Compatibility

Provides information on using COM components in ASP.NET pages compared to using them in ASP pages.

Related Sections

Accessing Data with ASP.NET

Describes how to bind data from SQL Server to ASP.NET Web server controls.

ASP.NET Configuration Overview

Describes the ASP.NET configuration system.

Creating ASP.NET Web Applications

Explains how to create Web applications using ASP.NET.

Optimizing Performance in ASP.NET

Provides guidelines for practices that can make ASP pages migrated to ASP.NET run faster.

See Also

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