SolidColorBrush Class

The SolidColorBrush is the most basic brush that applies an appearance to an object. A SolidColorBrush can be specified in XAML as an attribute value, through a type conversion syntax that uses several conventions for the meaning of the string for specifying a color. Other brushes (for example LinearGradientBrush) require a property element syntax (unless you use a reference, such as {StaticResource}). Object element syntax for a SolidColorBrush is possible, and is useful for the following reasons:

• You want to provide a Name to the object element and target its properties later.

• You are defining a SolidColorBrush as a resource.

• You are setting an Opacity on the SolidColorBrush.

You can animate a SolidColorBrush using either ColorAnimation or ColorAnimationUsingKeyFrames. Usually this is done not by animating the Color property of a SolidColorBrush, but is instead by using indirect targeting of a property such as Shape::Fill that takes a Brush. The ColorAnimation reference topic shows an example.

A SolidColorBrush is created as part of a type conversion syntax enabled by the Brush class and by SolidColorBrush itself. The syntax is described above in the "XAML Attribute Usage" subsection of the Syntax section. This syntax enables you to specify a string value for an attribute that takes a Brush, and the string is interpreted within a number of possible conventions, which include named colors, RGB, or ScRGB. Both RGB and ScRBG can specify an alpha value. For more information on the XAML syntax, see Color and Brush.

Setting Predefined Colors for a SolidColorBrush in Code

//constructor technique
SolidColorBrush scb = new SolidColorBrush(Colors.Black);
//postconstruction technique
SolidColorBrush scb2 = new SolidColorBrush();
scb2.Color = Colors.Black;

One of the most common operations in any presentation technology is to paint an area with a solid color. To accomplish this task, Windows Phone provides the SolidColorBrush class. The following sections describe the different ways to paint with a SolidColorBrush.

To paint an area with a solid color in XAML, use one of the following options:

• Select a predefined SolidColorBrush by name. For example, you can set the Fill of a Rectangle to Red or MediumBlue. The example uses the name of a predefined SolidColorBrush to set the Fill of a Rectangle.

  XAML

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  <!-- This rectangle's fill is painted with a red SolidColorBrush,
  described using a named color. -->
  <Rectangle Width="100" Height="100" Margin="20" Fill="Red" />
  
  
  

• Choose a color from the 32-bit color palette by specifying the amounts of red, green, and blue to combine into a single solid color. The format for specifying a color from the 32-bit palette is #rrggbb, where rr is a two character hexadecimal number specifying the relative amount of red, gg specifies the amount of green, and bb specifies the amount of blue. Additionally, the color can be specified as #aarrggbb, where aa specifies the alpha value, or transparency, of the color. This approach enables you to create colors that are partially transparent. In the following example, the Fill of a Rectangle is set to fully opaque red using hexadecimal notation.

  XAML

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  <!-- This rectangle's background is painted with a red SolidColorBrush,
  described using hexadecimal notation. -->
  <Rectangle Width="100" Height="100" Margin="20" Fill="#FFFF0000" />
  
  
  

• Use property element syntax to describe a SolidColorBrush. This syntax is more verbose but enables you to specify additional settings, such as the brush's opacity. In the following example, the Fillproperties of two Rectangle elements are set to fully opaque red. The first brush's color is described using a predefined color name. The second brush's color is described using hexadecimal notation.

  XAML

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  <!-- Both of these rectangles' fills are painted with red
  SolidColorBrush objects, described using object element
  syntax. -->
  <Rectangle Width="100" Height="100" Margin="20">
      <Rectangle.Fill>
          <SolidColorBrush Color="Red" />
      </Rectangle.Fill>
  </Rectangle>
  
  <Rectangle Width="100" Height="100"  Margin="20">
      <Rectangle.Fill>
          <SolidColorBrush Color="#FFFF0000" />
      </Rectangle.Fill>
  </Rectangle>
  
  
  

Windows Phone OS

Windows Phone

Reference

Other Resources