XS202010226324/DeceiveBarcodeManagement/Control/CanvasControl.cs

using System;
using System.Windows;
using System.Windows.Controls;

namespace DeceiveBarcodeManagement.Control
{
    public class CanvasControl : Canvas
    {
        protected override Size MeasureOverride(Size constraint)
        {
            Size size = new Size();
            foreach (UIElement element in Children)
            {
                double left = Canvas.GetLeft(element);
                double top = Canvas.GetTop(element);
                left = double.IsNaN(left) ? 0 : left;
                top = double.IsNaN(top) ? 0 : top;

                element.Measure(constraint);

                Size desiredSize = element.DesiredSize;
                if (!double.IsNaN(desiredSize.Width) && !double.IsNaN(desiredSize.Height))
                {
                    size.Width = Math.Max(size.Width, left + desiredSize.Width);
                    size.Height = Math.Max(size.Height, top + desiredSize.Height);
                }
            }

            size.Width += 10;
            size.Height += 10;
            base.InvalidateMeasure();
            return size;
        }
    }
}