Introduction to Web Dynpro

Web Dynpro for ABAP is the SAP standard user interface technology developed by SAP AG. It can be used in the development of web-based applications in the SAP ABAP environment. It provides a front-end web user interface to connect directly to back-end SAP R/3 systems to access data and functions for reporting.

Web Dynpro for ABAP consists of a run-time environment and a graphical development environment with specific development tools that are integrated in the ABAP Workbench (transaction: SE80).

Architecture of Web Dynpro

The following illustration shows the overall architecture of Web Dynpro:

Following are a few points to keep in mind regarding Web Dynpro:

• All Web Dynpro applications are structured as per the Model View Controller (MVC) programming model.
• The model defines an interface to the main system and the Web Dynpro application can have an access to system data.
• The view is responsible for showing the data in the web browser.
• The controller resides between the view and the model. The controller formats the model data to be displayed in the view. It processes the user entries made by the user and returns them to the model.

Web Dynpro Component and Window

The component is the global unit of the Web Dynpro application project. Creating a Web Dynpro component is the initial step in developing a new Web Dynpro application. Once the component is created, it acts as a node in the Web Dynpro object list. You may create any number of component views in a component and assemble them in any number of the corresponding Web Dynpro windows.

At least one Web Dynpro window is contained in each Web Dynpro component. A window is used to group multiple views and to specify the navigation between the views. A view can only displayed by the browser if the view is embedded in a window.