(This section introduces the WebPart technology introduced in ASP.NET. First, it discusses the basics of Web Parts, how to create the underlying Web Parts page, customize the display of WebPartZone, how to dynamically switch the display mode of Web Parts pages, and how to dynamically modify the Web Parts page. part. This section also provides an in-depth introduction to how to use personalization in a web part to save the changed data of the web part)