StreamGeometryContext.PolyBezierTo 方法
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
繪製一條或多條連通的貝茲曲線。
public:
abstract void PolyBezierTo(System::Collections::Generic::IList<System::Windows::Point> ^ points, bool isStroked, bool isSmoothJoin);public abstract void PolyBezierTo(System.Collections.Generic.IList<System.Windows.Point> points, bool isStroked, bool isSmoothJoin);abstract member PolyBezierTo : System.Collections.Generic.IList<System.Windows.Point> * bool * bool -> unitPublic MustOverride Sub PolyBezierTo (points As IList(Of Point), isStroked As Boolean, isSmoothJoin As Boolean)參數
例外狀況
嘗試透過呼叫 BeginFigure(Point, Boolean, Boolean) 該方法，在不開始圖形的情況下加入一段。
範例
以下範例展示了如何利用該 PolyBezierTo 方法繪製多條連通貝塞爾曲線。
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Collections.Generic;
namespace SDKSample
{
public partial class StreamGeometryPolyBezierToExample : Page
{
public StreamGeometryPolyBezierToExample()
{
// Create a path to draw a geometry with.
Path myPath = new Path();
myPath.Stroke = Brushes.Black;
myPath.StrokeThickness = 1;
// 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 collection of Point structures that will be used with the PolyBezierTo
// Method to create the Bezier curve.
List<Point> pointList = new List<Point>();
// First Bezier curve is specified with these three points.
// First control point for first Bezier curve.
pointList.Add(new Point(100,0));
// Second control point for first Bezier curve.
pointList.Add(new Point(200, 200));
// Destination point for first Bezier curve.
pointList.Add(new Point(300, 100));
// Second Bezier curve is specified with these three points.
// First control point for second Bezier curve.
pointList.Add(new Point(400, 0));
// Second control point for second Bezier curve.
pointList.Add(new Point(500, 200));
// Destination point for second Bezier curve.
pointList.Add(new Point(600, 100));
// Create a Bezier curve using the collection of Point Structures.
ctx.PolyBezierTo(pointList, true /* is stroked */, false /* is smooth join */);
}
// Freeze the geometry (make it unmodifiable)
// for additional performance benefits.
geometry.Freeze();
// specify the shape (Bezier curve) of the path using the StreamGeometry.
myPath.Data = geometry;
// Add path shape to the UI.
StackPanel mainPanel = new StackPanel();
mainPanel.Children.Add(myPath);
this.Content = mainPanel;
}
}
}
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes
Imports System.Collections.Generic
Namespace SDKSample
Partial Public Class StreamGeometryPolyBezierToExample
Inherits Page
Public Sub New()
' Create a path to draw a geometry with.
Dim myPath As New Path()
myPath.Stroke = Brushes.Black
myPath.StrokeThickness = 1
' Create a StreamGeometry to use to specify myPath.
Dim geometry As New StreamGeometry()
geometry.FillRule = FillRule.EvenOdd
' Open a StreamGeometryContext that can be used to describe this StreamGeometry
' object's contents.
Using ctx As StreamGeometryContext = geometry.Open()
' Set the begin point of the shape.
ctx.BeginFigure(New Point(10, 100), True, False) ' is closed - is filled
' Create a collection of Point structures that will be used with the PolyBezierTo
' Method to create the Bezier curve.
Dim pointList As New List(Of Point)()
' First Bezier curve is specified with these three points.
' First control point for first Bezier curve.
pointList.Add(New Point(100,0))
' Second control point for first Bezier curve.
pointList.Add(New Point(200, 200))
' Destination point for first Bezier curve.
pointList.Add(New Point(300, 100))
' Second Bezier curve is specified with these three points.
' First control point for second Bezier curve.
pointList.Add(New Point(400, 0))
' Second control point for second Bezier curve.
pointList.Add(New Point(500, 200))
' Destination point for second Bezier curve.
pointList.Add(New Point(600, 100))
' Create a Bezier curve using the collection of Point Structures.
ctx.PolyBezierTo(pointList, True, False) ' is smooth join - is stroked
End Using
' Freeze the geometry (make it unmodifiable)
' for additional performance benefits.
geometry.Freeze()
' specify the shape (Bezier curve) of the path using the StreamGeometry.
myPath.Data = geometry
' Add path shape to the UI.
Dim mainPanel As New StackPanel()
mainPanel.Children.Add(myPath)
Me.Content = mainPanel
End Sub
End Class
End Namespace
備註
第一個 points 點指定第一個控制點，下一個點指定第二個控制點，第三點指定終點，下一個點指定下一條曲線的第一個控制點，依此類推。
此方法以前一段的終點作為起點。 如果這是圖中的第一個段，則以該方法指定的 BeginFigure 點作為起點。
若 A StreamGeometry 包含 a Transform 或任何非劃線或未填充的區段，則無法序列化。
