MCPD 70-518 Exam Ref: Designing and Developing Windows® Applications Using Microsoft® .NET Framework 4

Objective 2.6: Design for UI Responsiveness

While the primary function of the Presentation layer is to interact with the user, you also can use the computer power of the client by handling computing tasks that do not require communication with the server or data layers. Using multithreaded techniques enables you to use the processing power of the client while maintaining responsiveness in the UI.

This objective covers how to:

• Offload operations from the UI thread.

• Report progress.

• Avoid unnecessary screen refreshes.

• Determine whether to sort and filter data on the client or server.

Offloading Operations from the UI Thread and Reporting Progress

The BackgroundWorker component is designed to allow you to execute time-consuming operations on a separate, ...