Articolo
11/17/2011

Style.TargetType Property

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

Gets or sets the type for which the style is intended.

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

Syntax

'Declaration
Public Property TargetType As Type

public Type TargetType { get; set; }

<Style TargetType="typeName"/>

XAML Values

typeName
A string that specifies the type name of the type where the style is applied.

Property Value

Type: System.Type
The type of object to which the style is applied.

Remarks

You must set the TargetType property when you create a Style. If you do not, an exception is thrown.

You can set a style on any element that derives from FrameworkElement. Therefore, the target type can be any of those elements.

The Silverlight XAML processing behavior has special handling for property values that are of type Type. This behavior is to construct a Type as necessary, based on its type name, evaluated against the types that are mapped into XAML namespaces. You specify the evaluated type name as the typeName attribute value as shown in the XAML syntax section.

Examples

The following example creates two styles: one for a TextBlock and one for a TextBox. Each style is applied to two instances of a control to create a uniform appearance for each TextBlock and TextBox. The example sets the FrameworkElement.Style property of each control by referencing the Style as a StaticResource.

<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.

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