Articolo
11/18/2011

Setter Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Applies a value to a property in a Style.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.SetterBase
      System.Windows.Setter

Namespace: System.Windows
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public NotInheritable Class Setter _
    Inherits SetterBase

public sealed class Setter : SetterBase

<Setter .../>

The Setter type exposes the following members.

Constructors

	Name	Description
	Setter()	Initializes a new instance of the Setter class.
	Setter(DependencyProperty, Object)	Initializes a new instance of the Setter class with the specified property and value.

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Properties

	Name	Description
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	IsSealed	Gets a value that indicates whether this object is in an immutable state. (Inherited from SetterBase.)
	Property	Gets or sets the property to apply the Value to.
	Value	Gets or sets the value to apply to the property that is specified by the Setter.

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAnimationBaseValue	Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

A Style contains a collection of one or more Setter objects. Each Setter has a Property and a Value. The Property is the property of the element the style is applied to. The Value is the value that is applied to the property.

You must specify both the Property and Value properties on a Setter or an exception is thrown.

Examples

The following example creates two styles: one for a TextBlock and one for a TextBox. The style for the TextBlock sets the Foreground, FontSize, and VerticalAlignment properties. The style for the TextBox sets the Width, Height, Margin, Background, and FontSize properties. Each style is applied to two instances of a control to create a uniform appearance for each TextBlock and TextBox.

<StackPanel>
  <StackPanel.Resources>
    <!--Create a Style for a TextBlock to specify that the
              Foreground equals Navy, FontSize equals 14, and
              VerticalAlignment equals Botton.-->
    <Style TargetType="TextBlock" x:Key="TextBlockStyle">
      <Setter Property="Foreground" Value="Navy"/>
      <Setter Property="FontSize" Value="14"/>
      <Setter Property="VerticalAlignment" Value="Bottom"/>
    </Style>

    <!--Create a Style for a TextBlock that specifies that
              the Width is 200, Height is 20, Margin is 4,
              Background is LightBlue, and FontSize is 14.-->
    <Style TargetType="TextBox" x:Key="TextBoxStyle">
      <Setter Property="Width" Value="200"/>
      <Setter Property="Height" Value="30"/>
      <Setter Property="Margin" Value="4"/>
      <Setter Property="FontSize" Value="14"/>
      <Setter Property="Background">
        <Setter.Value>
          <LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
            <GradientStop Color="White" Offset="0.0"/>
            <GradientStop Color="LightBlue" Offset="0.5"/>
            <GradientStop Color="Navy" Offset="1"/>
          </LinearGradientBrush>
        </Setter.Value>
      </Setter>
    </Style>
  </StackPanel.Resources>

  <!--Apply the TextBlockStyle and TextBoxStyle to each 
          TextBlock and TextBox, respectively.-->
  <StackPanel Orientation="Horizontal">
    <TextBlock Style="{StaticResource TextBlockStyle}">
              First Name:
          </TextBlock>
    <TextBox Style="{StaticResource TextBoxStyle}"/>
  </StackPanel>
  <StackPanel Orientation="Horizontal">
    <TextBlock Style="{StaticResource TextBlockStyle}">
              Last Name:
          </TextBlock>
    <TextBox Style="{StaticResource TextBoxStyle}"  
                   Margin="6,4,4,4"/>
  </StackPanel>
</StackPanel>

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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