如何刷新图片框
我没什么问题要问。
假设我在 pictureBox 上写了一个椭圆，然后单击了一个按钮。我希望 pictureBox 能够自行刷新。
我尝试过PictureBox.Invalidate()，但无法成功。 我最诚挚的问候...
I've little question to ask.
Let's say I've written an ellipse on pictureBox, then clicked a button. I want pictureBox to refresh itself.
I've tried PictureBox.Invalidate(), but could'nt made it.
My best regards...
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尝试方法
PictureBox.Refresh()（继承自Control）。Try the method
PictureBox.Refresh()(inherited fromControl).您尝试过
PictureBox.Update();吗？或者尝试这样的http://msdn。 microsoft.com/en-us/library/system.windows.forms.picturebox.image.aspxHave you tried
PictureBox.Update();? Or try something like this http://msdn.microsoft.com/en-us/library/system.windows.forms.picturebox.image.aspx有几种方法可以更新 PictureBox，如果有一些延迟，您使用的方法会有所不同。我有一个程序，可以在 PictureBox 中绘制键入的字符，并且击键处理很慢，因此当我快速键入时，它会滞后。
如果我
pictureBox.Refresh() ;每次击键后，无论如何都会在处理击键后立即刷新图片。这样，当我快速打字时，我可以看到 PictureBox 试图赶上我，因为它绘制了每个字符。如果我
pictureBox.Invalidate( );，那么也会刷新图片，但前提是系统有一些空闲时间。这样，当我快速打字时，当系统试图赶上时，我看不到任何事情发生，然后我输入的所有内容突然出现。通常刷新会更好，但这里一篇文章描述了几种情况，其中Invalidate是更好的选择。
There are a couple ways to update the PictureBox, and the method you use makes a difference if you have some lag. I had a program that drew typed characters in a PictureBox, and the keystroke processing was slow so when I typed fast it would lag.
If I
pictureBox.Refresh();after each keystroke, then that refreshes the picture immediately after the keystroke is processed, no matter what. This way, when I typed fast I could see the PictureBox trying to catch up with me as it drew each character.If instead I
pictureBox.Invalidate();, then that refreshes the picture too, but only when the system has some free time. This way, when I typed fast I saw nothing happening while the system tried to catch up, and then everything I'd typed suddenly appeared.Usually Refresh is better, but here's an article that describes a couple situations where Invalidate is the better choice.