Windows apps
Collapse the table of content
Expand the table of content
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

StreamGeometryContext.BezierTo Method (Point, Point, Point, Boolean, Boolean)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Draws a Bezier curve to the specified point.

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

public abstract void BezierTo(
	Point point1,
	Point point2,
	Point point3,
	bool isStroked,
	bool isSmoothJoin


Type: System.Windows.Point

The first control point used to specify the shape of the curve.

Type: System.Windows.Point

The second control point used to specify the shape of the curve.

Type: System.Windows.Point

The destination point for the end of the curve.

Type: System.Boolean

true to make the segment stroked when a Pen is used to render the segment; otherwise, false.

Type: System.Boolean

true to treat the join between this segment and the previous segment as a corner when stroked with a Pen; otherwise, false.

Exception Condition

An attempt was made to add a segment without starting a figure by calling the BeginFigure method.

A cubic Bezier curve is defined by a start point, end point, and two control points. The first control point determines the curvature of the first half of the segment, and the second control point determines the curvature of the second half of the segment.

This method uses the end point of the previous segment as its starting point. If this is the first segment in a figure, it uses the point specified by the BeginFigure method as its start point.

A StreamGeometry cannot be serialized if it contains a Transform or any non-stroked or unfilled segments.

The following example shows how to draw a Bezier curve using the BezierTo method.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace SDKSample
    public partial class StreamGeometryBezierToExample : Page
        public StreamGeometryBezierToExample()

            // Create a StreamGeometry to use to specify myPath.
            StreamGeometry geometry = new StreamGeometry();
            geometry.FillRule = FillRule.EvenOdd;

            // Open a StreamGeometryContext that can be used to describe this StreamGeometry 
            // object's contents.
            using (StreamGeometryContext ctx = geometry.Open())
                // Set the begin point of the shape.
                ctx.BeginFigure(new Point(10, 100), true /* is filled */, false /* is closed */);

                // Create a Bezier curve using the 3 specifed points where the first two points
                // are control points and the last point is the destination point for the curve.
                ctx.BezierTo(new Point(100, 0), new Point(200,200), new Point(300,100), 
                             true /* is stroked */, false /* is smooth join */);


            // Create a path to draw a geometry with.
            Path myPath = new Path();
            myPath.Stroke = Brushes.Black;
            myPath.StrokeThickness = 1;

            // Freeze the geometry (make it unmodifiable)
            // for additional performance benefits.

            // specify the shape (Bezier Curve) of the path using the StreamGeometry.
            myPath.Data = geometry;

            // Add path shape to the UI.
            StackPanel mainPanel = new StackPanel();
            this.Content = mainPanel;

.NET Framework
Available since 3.0
Return to top
© 2018 Microsoft