[WPF] Some paths was disappeared when scale canvas

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TrnBoDng-2128 asked Mar 31, '20 AlexLi-MSFT commented Apr 7, '20

[WPF] Some paths was disappeared when scale canvas

When I add many Paths on canvas and zoom out canvas, some paths was disappeared.

I execute on Window 10, 64 bit and .Net 4.7

Please let me know, why some paths was disappeared and solution for this issue.

Thank you so much!

windows-wpf

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Answer 1 · 2020-03-31T03:32:13.74Z

AlexLi-MSFT answered Mar 31, '20 AlexLi-MSFT commented Apr 7, '20

Hi,

Welcome to our Microsoft Q&A platform!

You can add a Viewbox to the outermost layer of the Canvas.

 <Viewbox>
             <Canvas Width="400" Height="200" Name="canva">
                 ...
             </Canvas>
         </Viewbox>

Thanks.

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TrnBoDng-2128 · Mar 31, 2020 at 06:14 AM

Dear AlexLi-MSFT

Thank for your answer, but it isn't good in my case.

Code add rectangle into canvas below:

 p = new Path();
    
 p.Stroke = Brushes.Black;
    
 p.Fill = Brushes.Transparent;
    
  RectangleGeometry rectangleGeometry = new RectangleGeometry(new Rect(20, 20, 200, 20));
    
  p.Data = rectangleGeometry;
    
  p.StrokeThickness = 0.13;

0 ·

after.png (72 B)

AlexLi-MSFT TrnBoDng-2128 · Mar 31, 2020 at 06:35 AM

You can fix your code p.StrokeThickness = 1,then test your code.

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TrnBoDng-2128 AlexLi-MSFT · Mar 31, 2020 at 06:39 AM

p.StrokeThickness = 1 is worked, but I don't want to change StrokeThickness so much.

Please let me know, the minimum value StrokeThickness when scale canvas.

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