如何優化WPF中的Canvas繪圖？

Question

如何在WPF中優化Canvas繪圖，當我在程序「Paint」中有10000行時？當我畫「繪畫」時，我可以使用多少我需要線條和圓圈，但在我的程序agter + -10000中，我有滯後。 我用10000行創建一個測試程序，當我在畫布上移動鼠標矩形時，將位置更改爲光標。 這裏代碼

for (int i=0; i < 10000; i++) 
     { 
      Line l = new Line(); 
      l.Stroke = Brushes.Black; 
      l.StrokeThickness = 1; 
      l.X1 = 50+ privi; 
      l.Y1 = 50 + privi; 
      l.X2 = 100 ; 
      l.Y2 = 100 + privi; 
      MainCanvas.Children.Add(l); 
      privi += 5; 
} 

，在這裏我移動

if (clicked) 
     { 
      Point p = Mouse.GetPosition(MainCanvas); 
      rect.Margin = new Thickness(p.X-25, p.Y - 25, 0, 0); 
     } 
enter code here 

---

UPDATE

privi = 5; 
Rectangle rect = new Rectangle(); 
rect.Fill = Brushes.Black; 
rect.Width = 50; 
rect.Height = 50; 
MainCanvas.Children.Add(rect) 

Answer 1

我不知道，如果你需要的線條和矩形是在同畫布，否則我發現在第二個透明c中添加矩形MainCanvas上的anvas改善了反應性。

<Window x:Class="WpfApplication.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="MainWindow" Height="1080" Width="1024"> 
    <Canvas Name="MainCanvas" MouseMove="MainCanvas_MouseMove"> 
     <Canvas Name="RectCanvas" Background="Transparent" MouseMove="RectCanvas_MouseMove"> 
     </Canvas> 
    </Canvas> 
</Window> 

public partial class MainWindow : Window 
{ 
    double privi = 5; 

    Rectangle rect; 

    public MainWindow() 
    { 
     InitializeComponent(); 

     for (int i = 0; i < 10000; i++) 
     { 
      Line l = new Line(); 
      l.Stroke = Brushes.Black; 
      l.StrokeThickness = 1; 
      l.X1 = 50 + privi; 
      l.Y1 = 50 + privi; 
      l.X2 = 100; 
      l.Y2 = 100 + privi; 
      MainCanvas.Children.Add(l); 
      privi += 5; 
     } 

     rect = new Rectangle(); 
     rect.Width = 50; 
     rect.Height = 50;    
     rect.Fill = Brushes.Black; 
     Canvas.SetLeft(rect, 0); 
     Canvas.SetTop(rect, 0); 
     SecondCanvas.Children.Add(rect); 
    } 

    private void RectCanvas_MouseMove(object sender, MouseEventArgs e) 
    { 
     //if (clicked) 
     { 
      Point p = Mouse.GetPosition(MainCanvas); 
      rect.Margin = new Thickness(p.X - 25, p.Y - 25, 0, 0); 
     } 
    } 
}