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Prüfungsnummer : 70-511
Prüfungsnname: MCTS: Windows Applications Development with Microsoft .NET Framework 4 Practice Test
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QUESTION 2
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
The application contains a composite user control that includes a TextBox control named txtInput.
The user control will be hosted in a window and will have handlers for the text-changed event of txtInput.
You need to ensure that the application meets the following requirements:
Creates a text-changed event handler named Audit_TextChanged for the txtInput control.
Executes Audit_TextChanged even when specific handlers mark the event as handled.
Which code segment should you add to the constructor of the user control
A. txtInput.TextChanged+=Audit_TextChanged;
B. AddHandler(TextBox.TextChangedEvent, new RoutedEventHandler(Audit_TextChanged), true);
C. EventManager.RegisterClassHandler(typeof(TextBox),TextBox.TextChangedEvent, new
RoutedEventHandler(Audit_TextChanged), true);
D. EventManager.RegisterClassHandler(typeof(TextBox),TextBox.TextChangedEvent, new
RoutedEventHandler (Audit_TextChanged), false);
Answer: B
