从最小化状态还原后，如何重新绘制表单？

Question

I have a form in which i paint a waveform on a button click that is as soon as i click button, the waveform displays. Now when i minimize the form and maximize it again, the waveform disappears.How to repaint it? I have seen people using paint event but i dont know how to use it after/inside the button click event. Please help.

Answer 1

如果调用Control.Invalidate（），将发生Paint事件。