How to: Create a Quadratic Bezier Curve

This example shows how to create a quadratic Bezier curve. To create a quadratic Bezier curve, use the PathGeometry, PathFigure, and QuadraticBezierSegment classes.

Example

In the following examples, a quadratic Bezier curve is drawn from (10,100) to (300,100). The curve has a control point of (200,200).

[xaml]

In Extensible Application Markup Language (XAML), you can use attribute syntax to describe a path.

<Path Stroke="Black" StrokeThickness="1"
Data="M 10,100 Q 200,200 300,100" />

[xaml]

(Note that this attribute syntax actually creates a StreamGeometry, a lighter-weight version of a PathGeometry. For more information, see the Path Markup Syntax page.)

In XAML, you may also draw a quadratic Bezier curve using object element syntax. The following is equivalent to the previous XAML example.

<Path Stroke="Black" StrokeThickness="1">
<Path.Data>
<PathGeometry>
<PathGeometry.Figures>
<PathFigureCollection>
<PathFigure StartPoint="10,100">
<PathFigure.Segments>
<PathSegmentCollection>
<QuadraticBezierSegment Point1="200,200" Point2="300,100" />
</PathSegmentCollection>
</PathFigure.Segments>
</PathFigure>
</PathFigureCollection>
</PathGeometry.Figures>
</PathGeometry>
</Path.Data>
</Path>

This example is part of larger sample; for the complete sample, see the Geometries Sample.