WPF Canvas.SetLeft Problem

Question

set value not changed

Answer 1

Hi, @김 영철 . Welcome Microsoft Q&A.

Canvas.SetLeft is working fine. You could refer to the example below.

  <Window x:Class="CanvasLeftDemo.MainWindow"  
            ...  
            Title="MainWindow" Height="450" Width="800">  
          
            <Canvas Background="AliceBlue"   >  
            <Canvas x:Name="c" HorizontalAlignment="Stretch"  
                        VerticalAlignment="Stretch" Height="400" Width="580"  
                        Background="Green"  />  
            <Canvas x:Name="canvas" HorizontalAlignment="Stretch"  
                        VerticalAlignment="Stretch" Height="400" Width="580"  
                        Background="Pink" />  
            </Canvas>  
         
          
    </Window>  

MainWindow.xaml.cs:

 public partial class MainWindow : Window  
    {  
        private UserControl1  objPoint1 = new UserControl1();  
        private UserControl1 objPoint2 = new UserControl1();  
        public MainWindow()  
        {  
            objPoint1.Height = 40;  
            objPoint2.Height = 40;  
            objPoint1.Width  = 40;  
            objPoint2.Width  = 40;  
            InitializeComponent();  
            canvas.Children.Add(objPoint1);  
            canvas.Children.Add(objPoint2);  
            Canvas.SetLeft(canvas, -10);  
            Canvas.SetTop(canvas, -10);  
            Canvas.SetLeft(objPoint1, 200);  
            Canvas.SetTop(objPoint1, 200);  
            Canvas.SetLeft(objPoint2, 203);  
            Canvas.SetTop(objPoint2, 203);  
  
        }  
    }  

The result:

Edit the code :

 public MainWindow()  
        {  
            objPoint1.Height = 40;  
            objPoint2.Height = 40;  
            objPoint1.Width  = 40;  
            objPoint2.Width  = 40;  
            InitializeComponent();  
            canvas.Children.Add(objPoint1);  
            canvas.Children.Add(objPoint2);  
            Canvas.SetLeft(canvas, -100000000);  
            Canvas.SetTop(canvas, -100000000);  
            Canvas.SetLeft(objPoint1, 100000070);  
            Canvas.SetTop(objPoint1, 100000070);  
            Canvas.SetLeft(objPoint2, 100000073);  
            Canvas.SetTop(objPoint2, 100000073);  
  
        }  

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