动态修改XAML中的路径、几何图形和形状

<Window x:Class="DynamicShapeModification.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Dynamic Shape Modification" Height="450" Width="800">
    <Grid>
        <Path Data="{Binding PathData}" Fill="Blue" Stroke="Black" StrokeThickness="2">
            <Path.Triggers>
                <EventTrigger RoutedEvent="Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" To="1" Duration="0:0:1" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Path.Triggers>
        </Path>
    </Grid>
</Window>

using System.ComponentModel;
using System.Windows;
using System.Windows.Media;

namespace DynamicShapeModification
{
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        private Geometry _pathData;

        public event PropertyChangedEventHandler PropertyChanged;

        public Geometry PathData
        {
            get { return _pathData; }
            set
            {
                _pathData = value;
                OnPropertyChanged("PathData");
            }
        }

        public MainWindow()
        {
            InitializeComponent();
            DataContext = this;

            // 初始化路径数据
            PathData = Geometry.Parse("M0,0 L100,0 100,100 0,100Z");
        }

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}