[WPF] 继承 FrameworkElement 并覆写 OnRender

 

using System;using System.Windows;using System.Windows.Input;using System.Windows.Media;using System.Reflection;namespace Cloud.RenderTheGraphic{ public class RenderTheGraphic : Window { [STAThread] public static void Main() { Application app = new Application(); app.Run(new RenderTheGraphic()); } public RenderTheGraphic() { this.Title = "Cloud Orz"; SimpleEllipse elips = new SimpleEllipse(); elips.Width = 200; elips.Height = 200; elips.HorizontalAlignment = HorizontalAlignment.Right; elips.VerticalAlignment = VerticalAlignment.Top; Content = elips; } } class SimpleEllipse : FrameworkElement { protected override void OnRender(DrawingContext drawingContext) { drawingContext.DrawEllipse(Brushes.Blue, new Pen(Brushes.Red, 24), new Point(this.RenderSize.Width / 2, RenderSize.Height / 2), this.RenderSize.Width / 2, RenderSize.Height / 2); } }}

 

继续练习.....