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try
{
Panel P = this.panel_画布区_B;
Rectangle rect = new Rectangle(0, 0, P.Width, P.Height);
Bitmap bmp = new Bitmap(rect.Width, rect.Height);
this.panel_画布区_B.DrawToBitmap(bmp, rect);
bmp.Save(saveFileDialog.FileName);
CntuImageSave(bmp, saveFileDialog.FileName, "image/jpeg");
bmp.Dispose();
}
catch (Exception)
{
//throw;
}