Online Access Free 70-511 Practice Test

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code segment. (Line numbers are included for reference only.)

You add the following code fragment within a WPF window control.

You need to ensure that the Contact class contains a business rule to ensure that the ContactName property is not empty or NULL. You also need to ensure that the TextBox control validates the input data.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two).

• A.Replace line 01 with the following code segment. Public Class Contact Implements INotifyPropertyChanging
• B.Add the following code segment at line 03. Public Event PropertyChanging As PropertyChangingEventHandler Modify line 08 with the following code segment: Set If Me.PcopertyChanging <> Nothing Then Proper:tyChanging(Me, New PropertyChangingEventArgs("ContactName")) End If If String. IsNull OrEmpty(value) Then Throw New ApplicationExceptionf'Contact name is required") End If contactNaroe = value End Set
• C.Replace line 01 with the following code segment. Public Class Contact Inherits ValidationRule
• D.Replace line 01 with the following code segment. Public Class Contact Implements IDataErrorInfo
• E.Add the following code segment at line 12. Public Readonly Property [Error] () As String Get Throw New Exception( string.Empty ) End Get End Property Public Default Readonly Property Item(columnName As String) As String Get If columnName = "ContactName" AndAlso String.IsNullOrEmpty(Me.ContactName) Then Return "Contact name is re quired" End If Return Nothing End Get End Property

You are developing a Windows Presentation Foundation (WPF) application.
A UserControl named usercontroll contains the following controls.
<StackPane1>
<Label Name="Label1" Content="Hello Exam!!!" />
</StackPanel>
You need to ensure that the content of the label displays "New Content!!!" programmatically from the code-behind of the application window that contains the UserControl.
Which code segment should you use?

• A.var label = userControll.FindName ("label1") as Label;
  label.Content = "New Content!!!";
• B.DependencyProperty dp =
  DependencyPropercy.Register("label1",
  typeof(Label), typeof(Window), new PropertyMetadata("New Content!!!"));
  userControl1.CoerceValue(dp);
• C.userControl1.Content = "New Content!!!";
• D.var label = userControl1.FindResource("label1") as Label;
  label.Content = "New Content!!!";

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

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. (Line numbers are included for reference only.)

You need to ensure that both Button controls display the "Save" text.
Which code fragment should you insert at line 06?

• A.<ContentPresentec Content="{Binding}" />
• B.<TextBlock Text="{TemplateBinding Content}" />
• C.<TextBlock Text="{Binding}" />
• D.<ContentPresentec />

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 IbxItems 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 IbxItems.
Which binding expression should you use?

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