private double SetProgressBar(int val, int max = -1)
{
if (max >= 0)
{
Progressbar.Maximum = max;
}
Progressbar.Value = val;
// perc
var perc = (double)Progressbar.Value * 100 / Progressbar.Maximum;
Progressbar.CreateGraphics().DrawString(perc.ToString("f0") + "%", new Font("微软雅黑 Light", 15, FontStyle.Regular, GraphicsUnit.Pixel), Brushes.Magenta, new PointF(Progressbar.Width / 2 - 15, Progressbar.Height / 2 - 10));
return(perc);
}
