Webpart Question: What is the difference between Sharepoint webpart life cycle and Asp.net lise cycle

Create a custom ASP.NET 2.0 Web Part

For most business needs.

To distribute your Web Part to sites that run ASP.NET 2.0 or SharePoint sites.

When you want to reuse one or more Web Parts created for ASP.NET 2.0 sites on SharePoint sites.

To use data or functionality provided by Windows SharePoint Services 3.0. For example, you are creating a a Web Part that works with site or list data.

Create a SharePoint-based Web Part

When you want to migrate a set of Web Parts using the SharePoint-based Web Part infrastructure to Windows SharePoint Services 3.0.

To create cross page connections.

To create connections between Web Parts that are outside of a Web Part zone.

To work with client-side connections (Web Part Page Services Component).

To use a data-caching infrastructure that allows caching to the content database