You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. You need to ensure that the StringMember property of the data-bound object is updated immediately when the user types in the TextBox control. Which binding expression should you use?

A. { Binding Path=StringMember, Mode=TwoWay }

B. { Binding Path=StringMember, NotifyOnSourceUpdated=True }

C. { Binding Path-StringMember, NotifyOnTargetUpdated=True }

D. { Binding Path=StringMember, UpdateSourceTrigger=PropertyChanged }

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70-511 · Question #3

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Question

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. < TextBox Text="{Binding Path=StringMember} " / > You need to ensure that the StringMember property of the data-bound object is updated immediately when the user types in the TextBox control. Which binding expression should you use?

Options

A{ Binding Path=StringMember, Mode=TwoWay }
B{ Binding Path=StringMember, NotifyOnSourceUpdated=True }
C{ Binding Path-StringMember, NotifyOnTargetUpdated=True }
D{ Binding Path=StringMember, UpdateSourceTrigger=PropertyChanged }

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