Windows Presentation Foundation Interview Questions/FAQs

1. General questions

1.1 What is WPF?

1.2 What is XAML?

1.3 What is XBAP?

2. Concepts Element Tree

2.1 How can I override the Logical Tree ?

2.2 How can I enumerate all the descendants of a visual object ?

3. Concepts Dependency Property

3.1 How can I create Custom Read-Only Dependency Properties ?

3.2 How can I use Dependency Property MetaData?

3.3 How can I register the default value of the State dependency property to be false?

4. Concepts Attached Property

4.1 What is Attached Properties and how to register it?

4.2 How can I set an attached property in code?

5. Concepts Attached Property

5.1 What is a Routed event?

5.2 How can I handle the input event through XAML?

6. Concepts Resources.

6.1 How can I use an application resource ?

7. Concepts Animation

7.1 What are the requirements for a property to be animated?

7.2 How do I trigger an animation when the data in the control is changed?

7.3 What is Path animation?

8. Concepts Freezable Object

8.1 What is a Freezable?

8.2 How can I determine whether a Freezable Is Frozen?

8.3 How can I obtain a writable copy of a Read-Only Freezable?

9. Concepts Input and Commands.

9.1 What is Commanding in WPF?

9.2 How do I create a CommandBinding using a RoutedCommand?

9.3 How can I add a CommandBinding to a window using markup?

10. Concepts Layouts

10.1 When I try to add multiple controls to a button it shows an error, how do I add multiple controls to a button?

10.2 How placing controls in a WrapPanel differs from a Grid?

11. XAML Inline Styles and Templates

11.1 How can I restrict the use of style ?

11.2 How can I create an extended style ?

11.3 How can I set a ControlTemplate ?

11.4 How can I create a custom WPF button whose look and feel depends on the Windows desktop theme currently in use. How do I get notified when the user changes the theme?

11.5 What are the limitations of Inline Styles and Templates ?

12. XAML XML Namespaces

12.1 How can I map CLR Namespaces to XML Namespaces in an Assembly ?

12.2 Which namespace is used to associate namespace identifiers with element names ? Is there any effect on the attributes ?

13. XAML Code Behind

13.1 What is the use of x:code ?

14. XAML Custom Class

14.1 What way can a custom class can be defined in XAML?

15. XAML Type Converters

15.1 How can I apply the TypeConverter Attribute?

16. Content Model ItemControl

16.1 How can I create Four Button controls with the contents set to a String, a DateTimeObject, an UIElement and A Panel that contains other UIElement objects?

16.2 Can I create a ContentTemplate and apply the template to a ContentControl ?

17. Content Model HeaderedItemsControl

17.1 How can I create a ControlTemplate for a HeaderedItemsControl ?

18. Content Model HeaderedContentControl

18.1 How can I make a style for a ContentControl so that the control has an enhanced visual appearance ?

19. Content Model Content Control

19.1 How can I get an enumerator to the ContentControl's logical child elements ?

20 Content Model Decorator Content Model

20.1 How do I create a Borderless Window in WPF ?

20.2 How can I animate a BorderThickness value ?

20.3 How can I use Event Trigger to control a StoryBoard after it is started ?

21 Content Model Panel Content Model

21.1 How do I add controls to Panel Content Model type of controls?

22 Documents Serialization and Storage

22.1 How can I store a given document in a specific format using CreateSerializerWriter methods ?

22.2 How can I use MemoryStream to create a deep clone of a serializable object ?

22.3 How can I do versioning using Custom Serialization ?

23 Documents Annotations

23.1 How can I Match Annotations with Annotated Objects ?

23.2 How can I create an application that is used to declare a Context Menu with routed commands that the users can access to create and manage annotations ?

24 Documents Flow Content

24.1 How can I define three paragraphs under one section ?

24.2 How can I use the BlockUIContainer element to host UIElement objects within Flow content ?

24.3 Can I embed a figure into a paragraph of text ?

25 Documents Printing

25.1 How can I programmatically print XPS Files ?

26 Graphics and Multimedia Rendering Graphics

26.1 How can I create a combine hard and soft shadow ?

26.2 How can I use a DoubleAnimation to rotate the textblock ?

26.3 What is the order in which the controls are rendered ?

26.4 How do I enumerate child objects in a visual tree ?

26.5 How rendering in WPF differs from WIN32 applications?

27 Graphics and Multimedia Animation and Timing

27.1 When an animation is applied, the property value gets overwritten. How do we prevent the value of property ?

27.2 Performance gets reduced even after navigating away from a page that contains animation. How do we handle this issue ?

27.3 How do I apply an animation without using a storyboard ?

28 Graphics and Multimedia 2D Graphics

28.1 How do I apply BitmapEffect to a particular area of an Image ?

28.2 How do I apply Transform when an event is occurred ?

28.3 In what way CombinedGeometry is used ?

29 Graphics and Multimedia 3D Graphics

29.1 What are the properties that reduce the performance of a 3D graphics ?

29.2 How lights are useful in 3D graphics ?

29.3 How do I change the location of a model ?

30 Graphics and Multimedia Visual Layer

30.1 How HitTest methods in VisualTreeHelper is useful ?

30.2 How do I use DrawingVisual object ?

31 Control Customization Adorners

31.1 What is an adorner ?

31.2 Where can adorners be used ?

31.3 How to add a custom adorner ?

31.4 How do I bind an Adorner to an Element ?

31.5 How do I remove the Adorner from an element ?

32 Control Customization Stylable controls

32.1 Where can I find information about guidelines to be followed while designing Stylable controls?

32.2 What are the different models for Control authoring ?

33 Control Customization ControlTemplates

33.1 What is the use of a ControlTemplate ?

33.2 How to access elements that are embedded inside the ControlTemplate ?

33.3 How do I build an ItemsControl ControlTemplate ?

33.4 How to edit templates using Microsoft Expression Blend ?

33.5 How to get the default template of a control programmatically ?

34 Data Data Binding

34.1 How to use binding in XAML ?

34.2 What is the use of the RelativeSource property ?

34.3 What is DataContext ? How is it used ?

34.4 Can ItemControl's Items and ItemsSource properties be modified simultaneously ?

34.5 How do I filter Items in an ItemControl when the ItemControl's ItemsSource is set to a datasource?

34.6 What are the uses of BindingModes?

34.7 How do I update the source as I type in a TextBox?

34.8 When an XMLDataProvider can be used ? What are it's specific uses ?

34.9 How does TwoWay BindingMode work in an XMLDataProvider?

34.10 In what way is an ObjectDataProvider useful?

34.11 How to pass a parameter to a constructor using ObjectDataProvider ?

34.12 How to pass a parameter to a function using ObjectDataProvider ?

34.13 How can I bind a method and pass a parameter to the method ?

34.14 How to Get or Set a value that indicates whether to include the DataErrorValidationRule ?

35 Data DragandDrop

35.1 What are the objects involved in DragandDrop?

35.2 How do I create a DataObject?

35.3 How do I retrieve data from a DataObject ?

36 Data Serialization

36.1 What is Serialization ?

36.2 How to write an IsolatedStorage to an XML file ?

36.3 How do I serialize objects to a binary file ?

37 Globalization and Localization Attributes

37.1 What are the three types of Localizability Attributes and how to use them ?

37.2 How can I set the Language property to the current user's UI language ?

37.3 How can I set the substitution property by overriding the default substitution ?

38 Globalization and Localization Comments

38.1 How can I specify in the .proj file whether to leave the free-form localization comments in the assembly using LocalizationDirectivesToLocFile tag ?

38.2 How can I add localization comments to an XAML file ?

39 Globalization and Localization Globalization Struc

39.1 Can I override the default categories for platform controls in XAML as well ?

39.2 How can I automatically layout Grids Using the IsSharedSizeScope Property ?

40 Application and Deployment ClickOnce

40.1 How does ClickOnce deployment work ?

40.2 Can I add prerequisites in my ClickOnce deployment ?

40.3 How do I enable automatic updates for my application using ClickOnce deployment ?

41 Application and Deployment Frame

41.1 What is the difference between Frame and NavigationWindow ?

41.2 How does Rendering work in Frame control ?

41.3 Can I add dynamic HTML content to a Frame control ?

42 Application and Deployment Page

42.1 Are XAML Browser Applications OS independent ?

42.2 When I run an XBAP application, I get Application Deployment Error. What do I do to overcome this error ?

42.3 How to navigate between pages in an application ?

43 Application and Deployment Navigation

43.1 How to set content of a NavigationWindow ?

43.2 How do I handle Back and Forward button click ?

43.3 How do I pass data between pages in a NavigationWindow ?

44 Application and Deployment Setup

44.1 How do I add registry entries in a setup project ?

44.2 How do I deploy shared components ?

44.3 How launch conditions are useful and how to add one to a setup project ?

45 Application and Deployment Window

45.1 How do I create a child window in WPF ?

45.2 How do I host Windows Forms control in a WPF Window ?

45.3 Does WPF support MDI ?

46 Interoperability Message Loops Between

46.1 How can I write Message Loops ?

46.2 How can I HwndSource Treats ComponentDispatcher Events ?

46.3 How can I set the Owner property of the WPF window to the handle of our main form using helper class ?

47 Interoperability Win32 in WPF

47.1 How can I use Windows Forms in a WPF application ?

47.2 How do I host a Windows Forms control in a WPF application ?

47.3 How can I leverage my current investment in Windows Forms applications and still tap into the cool features of WPF ?

47.4 How can I host a Windows Forms Composite Control in Windows Presentation Foundation ?

48 Interoperability WPF in Win32

48.1 How do I host a WPF control in a Windows Forms application?

48.2 How can I Host the WPF UserControl in Windows Forms ?

48.3 What is the procedure to host the WPF content in Win32 window ?

49 Interoperability Windows Forms and WPF

49.1 Will you provide a tool to convert Windows Forms applications to WPF applications ?

49.2 What about user controls and third-party controls including ActiveX controls?

49.3 Where do I find System.Windows.Forms.Integration ?

49.4 Can I use a WindowsFormsHost element to host a System.Windows.Forms ?

50 Security Trusted Security

50.1 How do I assign full trust to an XBAP application ?

50.2 I am able to access the registry using full trust XBAP application in debug mode, when hosted in an intranet, the application gets crashed. What do I do?

50.3 How do I get a custom defined permission set of an XBAP application ?

51 Security Partial Trust Security

51.1 How to get data from database in XBAP application ?

51.2 Does permission set of partial trust change in the Local Intranet and Internet?

51.3 How do I detect permission for a file in a partial trust application ?

52 Tools Microsoft Expression Blend

52.1 Can a WPF application be designed using Microsoft Expression Blend ?

52.2 How do I add animations using Microsoft Expression Blend ?

52.3 How do I add custom controls to an application using Microsoft Expression Blend ?

53 Tools ZAM3D

53.1 What is ZAM3D ?

53.2 What are the file formats supported by ZAM3D ?

53.3 Can an XAML file created using ZAM3D be used with Visual Studio.NET ?

54 Tools XAMLPAD

54.1 What is XAMLPAD ?

54.2 Does XAMLPAD support custom controls ?

54.3 Can we see the output of an XAML using XAMLPAD ?

55 Controls ToolTip

55.1 Can I delay the display of a ToolTip ?

55.2 How can I use the ToolTipService properties to specify the position of a tooltip whose content is not a ToolTip object ?

55.3 Can I use the BetweenShowDelay Property ?

56 Controls TextBlock

56.1 How can I make a TextBlock editable when it is clicked and the value is committed when ESC or ENTER is pressed?

57 Controls TabControl

57.1 How do I prevent the user from changing the selected tab page in a TabControl ?

57.2 How do I dynamically hide and unhide tabs in a TabControl ?

57.3 How do I make the tabs in a TabControl appear on the bottom instead of the right?

57.4 How can I add a style to a TabItem that is used in the TabControl ?

58 Controls ProgressBar

58.1 How can I create a ProgressBar and use an animation to simulate the progress of an operation ?

58.2 How can I make the text changed by itself during progress?

59 Controls PrintDialog

59.1 How can I create and display a PrintDialog ?

59.2 How do I display the PrintPreview as a maximized window and control it's zooming ?

60 Controls Popup

60.1 How can I animate a Popup ?

60.2 How can I specify a Custom Popup Position ?

61 Controls TextBox

61.1 How do I format numbers, dates and currencies in a TextBox ?

61.2 How do I make a TextBox use all upper-case (or lower-case) characters ?

61.3 How do I support browsing for a text file and reading it into a TextBox?

62 Controls Canvas

62.1 How can I use the attached properties of Canvas to position child elements ?

63 Controls ComboBox

63.1 How do I fill a ComboBox with the available fonts ?

63.2 How do I bind the values of an enum to a ComboBox ?

64 Controls ListBox

64.1 How do I bind a string array with a ListBox?

64.2 How do I display items in a ListBox horizontally?

65 Controls StatusBar

65.1 How do I create custom layout for StatusBar items?

66 Controls ToolBar

66.1 How do I determine which button in a ToolBar is clicked ?

66.2 How can I apply a Style to a Menu control on a ToolBar ?

66.3 When I tab into a toolbar in WPF I can't tab out again ? What can I do to change this tab behavior ?

67 Controls Context Menu

67.1 How do I make the Context Menu appear only when clicked at certain portions of the Control ?

67.2 How can I enable a Context Menu on a disabled Control ?

67.3 How can I create a shared Context Menu ?

67.4 How do I make the Context Menu to close after a set time interval?

68 Controls Expander

68.1 How can I create an Expander with a ScrollViewer ?

68.2 How can I bind the Expander's header element's Width to the ActualWidth of the Expander ?

68.3 How do I make the Expander button to be justified to the right, rather than the left which is the default ?

69 Controls DocumentViewer

69.1 How can I replace the style of a DocumentViewer ?

69.2 How can I extend the style of a DocumentViewer ?

69.3 How can I DataBind DocumentViewer's Zoom Property to a TextBox ?

69.4 How to load an XPS document into the DocumentViewer?

70 Controls FlowDocumentReader

70.1 How can I load an XAML file into a FlowDocumentReader?

70.2 How can I save the contents of a FlowDocumentReader as an XAML file ?

71 Controls GroupBox

71.1 How can I create a GroupBox that has a title and a visible border that encloses it's content ?

72 Controls GridSplitter

72.1 How can I make sure that a GridSplitter Is visible ?

72.2 How can I create and use a GridLengthConverter Object ?

73 Controls Image

73.1 How can I convert an Image to grayscale ?

73.2 How can I crop an Image ?

73.3 Why does adding images to an ImageList in the Designer cause them to lose their alpha channel ?

73.4 How to rotate an image ?

73.5 How do I access / edit the metadata associated with an Image ?

73.6 How can the DrawVisual be used for rendering images ?

74 Controls Menu

74.1 How do I enable the mnemonics (underlines) being displayed when an application is launched ?

74.2 How can I style a Separator used as a Menu Item ?

75 Controls ScrollBar

75.1 How can I use the member values of the enumeration to set the HorizontalScrollBarVisibility property of the ScrollViewer control ?

75.2 How can I use the Content-Scrolling Methods of ScrollViewer ?

76 Controls Slider

76.1 How can I customize the Ticks on a Slider ?

76.2 Can I bind two sliders in two different windows ?

77 Controls RichTextBox

77.1 How do I add a hyperlink to a RichTextBox control ?

77.2 How do I create and save a RichTextFormat (RTF) file?

77.3 How do I support drag-and-drop for a RichTextBox?

77.4 How can I Save, Load, and Print RichTextBox Content ?

78 Controls Border

78.1 How can I animate the thickness of a border by using ThicknessAnimation ?

78.2 How can I use a BulletDecorator control that uses an image as the Bullet and a non-text element as the Child ?

79 Controls Border

79.1 How do I change the shape of the button to an ellipse?

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