What is Web part?

Web Parts are customizable plug and play components that empower information workers to create personalized user interfaces by simply dragging and dropping them on a Web page. Web parts allow customization at both design time and run time. There are two types of web parts-

 

1. In-built web parts: Web parts that are included in SharePoint. Developers can drag them from web part galleries and drop them into web part zones.
2. Custom web parts: Web parts that are created by the user using visual studio is called custom web parts.

A Web Part is composed of the following entities:

• The Web Part description file (.dwp) is a portable container of default and personalized property values for the Web Part.
• The Web Part assembly file (.dll) contains the logic and code for the Web Part, and is installed on the server running Windows SharePoint Services.
• Resource files that support the Web Part these are also stored on the server.
• Tables in the Windows SharePoint Services database are used to store current values of the Web Part properties.