Question

我想画一条曲线当我从xaml中绘制它时 - 一切都很好：我可以看到曲线

<Grid x:Name="mainGrid">
        <Path Stroke="#255468" StrokeThickness="12" Opacity="20" >
            <Path.Data>
                <PathGeometry>
                    <PathGeometry.Figures>
                        <PathFigureCollection>
                            <PathFigure x:Name="pf" StartPoint="60,60">
                        <PathFigure.Segments>
                            <PathSegmentCollection>
                                <PolyBezierSegment Points="70,60 100,300 150,150 200,200 "/>
                            </PathSegmentCollection>
                        </PathFigure.Segments>
                    </PathFigure>
                        </PathFigureCollection>
                    </PathGeometry.Figures>
                </PathGeometry>
            </Path.Data>
        </Path>


    <Button Content="Button" HorizontalAlignment="Left" Height="54" Margin="21,0,0,24" VerticalAlignment="Bottom" Width="59" Click="Button_Click"/>
</Grid>

但是当我从后面的代码中绘制相同的行时 - 它不起作用：

<Grid x:Name="mainGrid">
    <Path x:Name="orangePath" Stroke="Orange" StrokeThickness="12" Opacity="20"/>

        <Button Content="Button" HorizontalAlignment="Left" Height="54" Margin="21,0,0,24" VerticalAlignment="Bottom" Width="59" Click="Button_Click"/>
</Grid>

private void Button_Click(object sender, RoutedEventArgs e)
    {
        orangePath = new Path();


        PathFigure pathFigure = new PathFigure();
        pathFigure.StartPoint = new Point(60, 60);

        var ppp = new PolyBezierSegment();
        ppp.Points.Add(new Point(70, 60));
        ppp.Points.Add(new Point(100, 300));
        ppp.Points.Add(new Point(150, 150));
        ppp.Points.Add(new Point(200, 200));

        pathFigure.Segments.Add(ppp);

        PathGeometry pathGeometry = new PathGeometry();
        pathGeometry.Figures = new PathFigureCollection();

        pathGeometry.Figures.Add(pathFigure);

        orangePath.Data = pathGeometry;

    }

可能有什么问题？我必须动态添加点。在运行时。谢谢

Answer 1

问题是你正在创建一个新路径。删除这一行：

orangePath = new Path();

它应该可以正常工作。

Wpf路径不呈现

1 个答案: