70-511 · Question #20
You develop a Windows Presentation Foundation (WPF) application. This application is used to output data trends to customer service representatives. A data trend analysis is performed in a function…
The correct answer is B. Use ThreadPool.QueueUserWorkItem to invoke UpdateData. See the full explanation below for the reasoning.
Question
You develop a Windows Presentation Foundation (WPF) application. This application is used to output data trends to customer service representatives. A data trend analysis is performed in a function named UpdateTrendData. The trend analysis is a long-running process. The application contains the following code segment. Class MainWindow: Window { private void UpdateData(object arg) { double data = UpdateTrendData(); ... } } UpdateData is currently invoked on the UI thread when the form is first displayed. You need to process the data in a manner that does not cause the UI to freeze. What should you do?
Options
- AUse ThreadPool.SetMaxThreads(2, 2) and invoke UpdateData.
- BUse ThreadPool.QueueUserWorkItem to invoke UpdateData.
- CUse this.Dispatcher.Beginlnvoke to invoke UpdateData passing in the priority of Normal.
- DUse this.Dispatcher.BeginInvoke to invoke UpdateData passing in the priority of Background.
How the community answered
(24 responses)- A8% (2)
- B83% (20)
- C4% (1)
- D4% (1)
Community Discussion
No community discussion yet for this question.