Solid Brush in WPF
A solid brush is the most basic brush and paints an area
with a solid color. The SolidColorBrush
object represents a solid color brush. The Opacity property of the
SolidColorBrush represents the transparency of the color that values between 0
and 1 where 0 is fully transparent and 1 is fully opaque. The Color property
represents the solid color of the brush, which is a type of Colors class.
Creating a Solid Brush
The SolidColorBrush element in XAML creates a brush with a
solid color. The following code snippet creates a solid color brush with a blue
color.
<SolidColorBrush Color="Blue" />
We can also set the Color property to the hexadecimal code
of the color. The following code snippet sets the color of the SolidColorBrush
to blue using the hexadecimal value of blue color.
<SolidColorBrush Color="#FF0000FF" />
Figure 13 taken from MSDN shows the properties and
hexadecimal values of the properties of the Colors class.
![SolidColorBrushImg1.jpg]()
Figure 13. Colors class properties
As we have seen in the previous sections, the Fill property
of shape paints the internal areas of a shape. We can direct specify a color in
the Fill property and the default brush used to fill a shape is solid brush.
The code snippet in Listing 12 creates a rectangle shape sets the Fill property
to Blue.
<Rectangle
Width="200"
Height="100"
Stroke="Black"
StrokeThickness="4"
Fill="Blue">
</Rectangle>
Listing 12
The output looks like Figure 14.
![SolidColorBrushImg2.jpg]()
Figure 14. A shape filled with a solid color
We can simply replace Listing 12 with the Listing 13 where
we set Rectangle.Fill property to a SolidColorBrush with a blue color.
<Rectangle
Width="200"
Height="100"
Stroke="Black"
StrokeThickness="4">
<Rectangle.Fill>
<SolidColorBrush Color="Blue" />
</Rectangle.Fill>
</Rectangle>
Listing 13
The CreateARectangleWithSolidBrush
method listed in Listing 14 draws same rectangle in Figure 13 dynamically.
/// <summary>
/// Creates a blue rectangle with black border
/// </summary>
public void CreateARectangleWithSolidBrush()
{
// Create a
Rectangle
Rectangle
blueRectangle = new Rectangle();
blueRectangle.Height = 100;
blueRectangle.Width = 200;
// Create a blue
and a black Brush
SolidColorBrush
blueBrush = new SolidColorBrush();
blueBrush.Color = Colors.Blue;
SolidColorBrush
blackBrush = new SolidColorBrush();
blackBrush.Color = Colors.Black;
// Set
Rectangle's width and color
blueRectangle.StrokeThickness = 4;
blueRectangle.Stroke = blackBrush;
// Fill rectangle
with blue color
blueRectangle.Fill = blueBrush;
// Add Rectangle
to the Grid.
LayoutRoot.Children.Add(blueRectangle);
}
Listing 14