创建画布的基础知识

// 创建一个画布对象
Canvas myCanvas = new Canvas();
myCanvas.Width = 400;
myCanvas.Height = 300;
 
// 添加一个矩形到画布
Rectangle rect = new Rectangle();
rect.Width = 100;
rect.Height = 50;
Canvas.SetLeft(rect, 50); // 设置矩形的X坐标
Canvas.SetTop(rect, 50);  // 设置矩形的Y坐标
myCanvas.Children.Add(rect);
 
// 添加画布到主窗口
this.Content = myCanvas;