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How to: Create a LineSegment in a PathGeometry

  • Artikkeli

This example shows how to create a line segment. To create a line segment, use the PathGeometry, PathFigure, and LineSegment classes.

Example

The following examples draw a LineSegment from (10, 50) to (200, 70). The following illustration shows the resulting LineSegment; a grid background was added to show the coordinate system.

A LineSegment in a PathFigure A LineSegment drawn from (10,50) to (200,70)

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

<Path Stroke="Black" StrokeThickness="1"
  Data="M 10,50 L 200,70" />

(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 line segment by using object element syntax. The following is equivalent to the previous XAML example.

<Path Stroke="Black" StrokeThickness="1">
  <Path.Data>
    <PathGeometry>
      <PathFigure StartPoint="10,50">
        <LineSegment Point="200,70" />
      </PathFigure>
    </PathGeometry>
  </Path.Data>
</Path>

PathFigure myPathFigure = new PathFigure();
myPathFigure.StartPoint = new Point(10, 50);

LineSegment myLineSegment = new LineSegment();
myLineSegment.Point = new Point(200, 70);

PathSegmentCollection myPathSegmentCollection = new PathSegmentCollection();
myPathSegmentCollection.Add(myLineSegment);

myPathFigure.Segments = myPathSegmentCollection;

PathFigureCollection myPathFigureCollection = new PathFigureCollection();
myPathFigureCollection.Add(myPathFigure);

PathGeometry myPathGeometry = new PathGeometry();
myPathGeometry.Figures = myPathFigureCollection;

Path myPath = new Path();
myPath.Stroke = Brushes.Black;
myPath.StrokeThickness = 1;
myPath.Data = myPathGeometry;

Dim myPathFigure As New PathFigure()
myPathFigure.StartPoint = New Point(10, 50)

Dim myLineSegment As New LineSegment()
myLineSegment.Point = New Point(200, 70)

Dim myPathSegmentCollection As New PathSegmentCollection()
myPathSegmentCollection.Add(myLineSegment)

myPathFigure.Segments = myPathSegmentCollection

Dim myPathFigureCollection As New PathFigureCollection()
myPathFigureCollection.Add(myPathFigure)

Dim myPathGeometry As New PathGeometry()
myPathGeometry.Figures = myPathFigureCollection

Dim myPath As New Path()
myPath.Stroke = Brushes.Black
myPath.StrokeThickness = 1
myPath.Data = myPathGeometry

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

See also