单选题You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named

题目
单选题
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. The number of items of the data-bound collection is fixed. However, users can modify the properties of each of the Product objects in the collection. You need to ensure that changes made on the Product objects are automatically reflected in the ListBox control. What should you do?（）
A

 Implement the INotifyPropertyChanged interface in the Product class.

B

 Implement the INotifyCollectionChanged interface in the ProductList class.

C

 Set the Mode property of the Binding object of the ListBox control to TwoWay.

D

  Set the UpdateSourceTrigger property of the Binding object of the ListBox control to PropertyChanged.

相似考题

1. You use Microsoft .NET Framework 4 to create a custom Windows Presentation Foundation (WPF) application. Your environment includes several WPF applications. The applications use the same logo and style configuration as part of a corporate standard. You need to ensure that the existing applications can be updated to use the same logo and style settings without recompiling. Which two actions should you perform?（）A、 Mark the resource as an embedded resource in each application. B、 Create a resource in an XAML file that contains the logo and style configurations.C、 Create a resource in a custom control that contains the logo and style configurations.D、 Add the resource as a ResourceDictionary in the MergedDictionaries collection of each application.E、 Use ResourceManager to read the content of the resource. Manually assign the style configurations included in the resource file to the appropriate control in each application.

2. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You need to ensure that users can view content in a book-reading format that displays two pages at a time. Which control should you use?（）A、 FlowDocument B、 FlowDocumentReaderC、 FlowDocumentPageViewerD、 FlowDocumentScrollViewer

3. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a Button control for the application. You need to ensure that the application meets the following requirements: When the mouse pointer is over the Button control, the background color of the button is set to red and the Button control appears bigger. When the mouse pointer is not over the Button control, the button returns to its original state. What should you do?（）A、 Create a template. Declare a VisualState element in the template.B、 Create a StoryBoard animation. Add an EventTrigger class to the Button control that begins the StoryBoard animation.C、 Create a ScaleTransform class. Bind the ScaleX and ScaleY properties of the Button control to the Background property by using a custom value converter.D、 Add a method named ChangeAppearance in the code-behind file. Subscribe the ChangeAppearance method to the MouseEnter event of the Button control.

4. You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a property named ServiceContext to a control. You need the value of ServiceContext to flow to the child controls exactly like the value of the DataContext property of the FrameworkElement class. What should you do? （）A、 Inherit the control class from the DependencyObject class.B、 Register a dependency property. In the options settings of the property metadata, specify the Inherits option.C、 Declare a new property. In the get and set methods of the new property, create an instance of the TraversalRequest class. D、 Declare a new property. In the get method of the new property call VisualTreeHelper.GetParent. In the set method of the new property, call VisualTreeHelper.GetChild.

更多“单选题You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ”相关问题

  • 第1题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. The number of items of the data-bound collection is fixed. However, users can modify the properties of each of the Product objects in the collection. You need to ensure that changes made on the Product objects are automatically reflected in the ListBox control. What should you do?（）

    • A、 Implement the INotifyPropertyChanged interface in the Product class.
    • B、 Implement the INotifyCollectionChanged interface in the ProductList class.
    • C、 Set the Mode property of the Binding object of the ListBox control to TwoWay.
    • D、  Set the UpdateSourceTrigger property of the Binding object of the ListBox control to PropertyChanged.

    正确答案:A

  • 第2题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You need to ensure that the application meets the following requirements: Displays a menu that is specific to the control selected by the user. Displays the menu next to the control. Which control should you use? （）

    • A、 Menu
    • B、 PopUp
    • C、 ListBox
    • D、 ContextMenu

    正确答案:D

  • 第3题：

    You use Microsoft Visual Studio 2010 and Microsoft . NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a WPF window in the application. You add the following code segment to the application. public class ViewModel { public CollectionView Data { get; set; } } public class BusinessObject { public string Name { get; set; } } The DataContext property of the window is set to an instance of the ViewModel class. The Data property of the ViewModel instance is initialized with a collection of BusinessObject objects. You add a TextBox control to the Window. You need to bind the Text property of the TextBox control to the Name property of the current item of the CollectionView of the DataContext object. You also need to ensure that when a binding error occurs, the Text property of the TextBox control is set to N/A . Which binding expression should you use?（）

    • A、 { Binding Path=Data/Name, FallbackValue='N/A' }
    • B、 { Binding Path=Data.Name, FallbackValue='N/A' }
    • C、 { Binding Path=Data/Name, TargetNullValue='N/A' } 
    • D、 { Binding Path=Data.Name, TargetNullValue='N/A' }

    正确答案:A

  • 第4题：

    You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You discover that when the application runs, a user control is not rendered correctly. You need to find out the user interface (UI) element of the window that is causing the rendering problem. What should you do?（）

    • A、 Use the Local Window.
    • B、 Use the WPF Visualizer.
    • C、 Generate a trace log by using IntelliTrace.
    • D、 Set a breakpoint at the control. Run the application.

    正确答案:B

  • 第5题：

    You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application contains a ListBox control named lbxItems that is data-bound to a collection of objects. Each object has a DisplayValue property. You add a Button control to the application. You need to ensure that the Content property of the Button control is data-bound to the DisplayValue property of the selected item of lbxItems. Which binding expression should you use?（）

    • A、 { Binding ElementName=lbxItems, Source=SelectedItem, Path=DisplayValue }
    • B、 { Binding Source=lbxItems, ElementName=SelectedItem, Path=DisplayValue }
    • C、 { Binding ElementName=lbxItems, Path=SelectedItem.DisplayValue }
    • D、 { Binding Source=lbxItems, Path=SelectedItem.DisplayValue }

    正确答案:C

  • 第6题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Framework (WPF) application. You plan to create a custom control that contains four text input fields. Each of the text input fields within the control will contain a label. You need to ensure that the text input fields within the control can be validated by using a regular expression validator. Which class should you inherit from?（）

    • A、 TextBox
    • B、 TextElement
    • C、 UIElement
    • D、 UserControl

    正确答案:D

  • 第7题：

    单选题
    You use Microsoft Visual Studio 2010 and Microsoft . NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a WPF window in the application. You add the following code segment to the application. public class ViewModel { public CollectionView Data { get; set; } } public class BusinessObject { public string Name { get; set; } } The DataContext property of the window is set to an instance of the ViewModel class. The Data property of the ViewModel instance is initialized with a collection of BusinessObject objects. You add a TextBox control to the Window. You need to bind the Text property of the TextBox control to the Name property of the current item of the CollectionView of the DataContext object. You also need to ensure that when a binding error occurs, the Text property of the TextBox control is set to N/A . Which binding expression should you use?（）
    A

     { Binding Path=Data/Name, FallbackValue='N/A' }

    B

     { Binding Path=Data.Name, FallbackValue='N/A' }

    C

     { Binding Path=Data/Name, TargetNullValue='N/A' } 

    D

     { Binding Path=Data.Name, TargetNullValue='N/A' }


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Forms application. The application includes a RichTextBox control and a ListBox control. The ListBox control is populated with a list of valid file names. The application allows users to drag a ListBox item to the RichTextBox control. You need to provide a visual indication that a file that is dragged can be dropped on the RichTextBox control. What should you do?（）
    A

     Use a DoubleAnimation class.

    B

     Use a Storyboard animation class.

    C

     Use the DragDropEffects enumeration.

    D

     Use the DragAction enumeration.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application has multiple data entry windows. Each window contains controls that allow the user to type different addresses for shipping and mailing. All addresses have the same format. You need to ensure that you can reuse the controls. What should you create?（）
    A

     a user control

    B

     a data template

    C

     a control template

    D

     a control that inherits the Canvas class


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application contains a ListBox control named lbxItems that is data-bound to a collection of objects. Each object has a DisplayValue property. You add a Button control to the application. You need to ensure that the Content property of the Button control is data-bound to the DisplayValue property of the selected item of lbxItems. Which binding expression should you use?（）
    A

     { Binding ElementName=lbxItems, Source=SelectedItem, Path=DisplayValue }

    B

     { Binding Source=lbxItems, ElementName=SelectedItem, Path=DisplayValue }

    C

     { Binding ElementName=lbxItems, Path=SelectedItem.DisplayValue }

    D

     { Binding Source=lbxItems, Path=SelectedItem.DisplayValue }


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a custom control named Wheel. You need to ensure that the Speed property of Wheel can be animated. What should you do?（）
    A

     Inherit the DependencyObject class.

    B

     Declare the Speed property as a dependency property.

    C

     Declare an animation of the Speed property from within the code-behind file.

    D

     Implement the System.Windows.Media.Animation.IAnimatable interface with the Wheel class.


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    You are developing a Windows Presentation Foundation (WPF) application. You need to use XAML to create a custom control that contains two Button controls. From which base class should you inherit? （）
    A

     FrameworkElement

    B

     UIElement

    C

     UserControl

    D

     Button


    正确答案： B
    解析： 暂无解析

  • 第13题：

    You use Microsoft .NET Framework 4 to create a Windows Forms application. The application includes a RichTextBox control and a ListBox control. The ListBox control is populated with a list of valid file names. The application allows users to drag a ListBox item to the RichTextBox control. You need to provide a visual indication that a file that is dragged can be dropped on the RichTextBox control. What should you do?（）

    • A、 Use a DoubleAnimation class.
    • B、 Use a Storyboard animation class.
    • C、 Use the DragDropEffects enumeration.
    • D、 Use the DragAction enumeration.

    正确答案:C

  • 第14题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. The application has multiple data entry windows. Each window contains controls that allow the user to type different addresses for shipping and mailing. All addresses have the same format. You need to ensure that you can reuse the controls. What should you create?（）

    • A、 a user control
    • B、 a data template
    • C、 a control template
    • D、 a control that inherits the Canvas class

    正确答案:A

  • 第15题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a custom control named Wheel. You need to ensure that the Speed property of Wheel can be animated. What should you do?（）

    • A、 Inherit the DependencyObject class.
    • B、 Declare the Speed property as a dependency property.
    • C、 Declare an animation of the Speed property from within the code-behind file.
    • D、 Implement the System.Windows.Media.Animation.IAnimatable interface with the Wheel class.

    正确答案:B

  • 第16题：

    You are developing a Windows Presentation Foundation (WPF) application. You need to use XAML to create a custom control that contains two Button controls. From which base class should you inherit? （）

    • A、 FrameworkElement
    • B、 UIElement
    • C、 UserControl
    • D、 Button

    正确答案:C

  • 第17题：

    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. You need to ensure that changes to ProductList are automatically reflected in the ListBox control. What should you do? （）

    • A、  Implement the INotifyPropertyChanged interface in the Product class.
    • B、  Implement the IQueryable<Product> interface in the ProductList class.
    • C、  Extend the DependencyObject class in the Product class.
    • D、 Extend the ObservableCollection<Product> class in the ProductList class.

    正确答案:D

  • 第18题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a ListBox control to the application. The ListBox control is data-bound to an instance of a custom collection class of the Product objects named ProductList. You need to ensure that changes to ProductList are automatically reflected in the ListBox control. What should you do? （）
    A

      Implement the INotifyPropertyChanged interface in the Product class.

    B

      Implement the IQueryable<Product> interface in the ProductList class.

    C

      Extend the DependencyObject class in the Product class.

    D

     Extend the ObservableCollection<Product> class in the ProductList class.


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a property named ServiceContext to a control. You need the value of ServiceContext to flow to the child controls exactly like the value of the DataContext property of the FrameworkElement class. What should you do? （）
    A

     Inherit the control class from the DependencyObject class.

    B

     Register a dependency property.   In the options settings of the property metadata, specify the Inherits option.

    C

     Declare a new property.   In the get and set methods of the new property, create an instance of the TraversalRequest class. 

    D

     Declare a new property.   In the get method of the new property call VisualTreeHelper.GetParent.   In the set method of the new property, call VisualTreeHelper.GetChild.


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Framework (WPF) application. You plan to create a custom control that contains four text input fields. Each of the text input fields within the control will contain a label. You need to ensure that the text input fields within the control can be validated by using a regular expression validator. Which class should you inherit from?（）
    A

     TextBox

    B

     TextElement

    C

     UIElement

    D

     UserControl


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You need to ensure that the application meets the following requirements: Displays a menu that is specific to the control selected by the user. Displays the menu next to the control. Which control should you use? （）
    A

     Menu

    B

     PopUp

    C

     ListBox

    D

     ContextMenu


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You need to ensure that users can view content in a book-reading format that displays two pages at a time. Which control should you use?（）
    A

     FlowDocument 

    B

     FlowDocumentReader

    C

     FlowDocumentPageViewer

    D

     FlowDocumentScrollViewer


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a Button control for the application. You need to ensure that the application meets the following requirements: When the mouse pointer is over the Button control, the background color of the button is set to red and the Button control appears bigger. When the mouse pointer is not over the Button control, the button returns to its original state. What should you do?（）
    A

     Create a template. Declare a VisualState element in the template.

    B

     Create a StoryBoard animation. Add an EventTrigger class to the Button control that begins the StoryBoard animation.

    C

     Create a ScaleTransform class. Bind the ScaleX and ScaleY properties of the Button control to the Background property by using a custom value converter.

    D

     Add a method named ChangeAppearance in the code-behind file. Subscribe the ChangeAppearance method to the MouseEnter event of the Button control.


    正确答案： D
    解析： 暂无解析

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