class Chess:Label
{
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics g = e.Graphics;
Width = 30;
Height = 30;
Text = "";
AutoSize = false;
BackgroundImage = new Bitmap(Image.FromFile(Path.GetFullPath("..\\..\\") + "Models\\wxr.png"), 30, 30);
}
}
就是动态添加这个chess类的实例，第一个能正常添加，后面的动态添加后不能立即显示，拖动窗口才会显示。去掉类里面的背景设置BackgroundImage，也能变正常。求大神解答