WPF画星星

DrawStars.xml:

<Window x:Class="WPFapp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="DrawStars" Height="330" Width="330" Name="DrawStars">

    <Canvas Name="mainCanvas">
        <Polygon Name="star" Fill="Green" Points="205,150 217,186 259,186 223,204 233,246 205,222
                 177,246 187,204 151,186 193,186" />
    </Canvas>
    
</Window>

 

DrawStars.xaml.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPFapp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        //constructor
        public MainWindow()
        {
            InitializeComponent();

            Random random = new Random();

            for (int count = 0; count < 18; count++)
            {
                Polygon newStar = new Polygon();
                newStar.Points = star.Points;

                byte[] colorValues = new byte[4];
                random.NextBytes(colorValues);
                newStar.Fill = new SolidColorBrush(Color.FromArgb(colorValues[0], colorValues[1], 
                                                            colorValues[2], colorValues[3]));
                RotateTransform rotate = new RotateTransform(count*20,150,150);
                newStar.RenderTransform = rotate;
                mainCanvas.Children.Add(newStar);
            }
        }
        
    }
}