具有矩形的WPF 4.0 Canvas占用大量内存 [英] WPF 4.0 Canvas with rectangles consuming lots of memory

问题描述

推荐答案

• 我认为您不应该调用这三个InvalidateXXX-Methods.
  至少要消耗它们，建议不要显式调用它们
  尤其是当您也最终调用UpdateLayout时.
• 如果不为每个矩形创建一个新的Brush而是重用，您将获得一点记忆力
  预定义的静态"Brushes.Red"
• 将容量减少到4会导致在添加下一个重新摆放时隐式地将容量再次加倍，达到8.
  因此，在动态情况下，它可能无法节省内存.
• 高度为2的矩形框的StrokeThickness为2，StrokeThickness 1足够了.
• 对RemoveRange的调用通过了无效的计数值，计数应少4.
  

• I think you shouldn't call the three InvalidateXXX-Methods.
  they are at least perf consuming at it's recommended not to call them explicitly
  especially when you also call UpdateLayout finally.
• You will gain a little memory if you don't create a new Brush foreach rect but rather reuse
  the predefined static "Brushes.Red"
• Reducing capacity to 4 will cause capacity to be doubled up to 8 again implicitly when the next reatangle is added.
  So in a dynamic scenario it's probably not saving memory.
• How can a retcangle with height and width of 2 have StrokeThickness of 2, StrokeThickness 1 is enough.
• The call to RemoveRange passes an invalid value for count, count should be 4 less.
  

MainCanvas.Children.RemoveRange(4, MainCanvas.Children.Count - 4);
                        

• 考虑通过维护矩形池来重用矩形.

Chris




这篇关于具有矩形的WPF 4.0 Canvas占用大量内存的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！