private void PicBox_MouseUp(object sender, MouseEventArgs e)
{
var finish = new Point(e.X, e.Y); //для рисования
var g = Graphics.FromImage(bm);
var pen = new Pen(Color.Black, 5f);
g.DrawLine(pen, start, finish);
g.Save();
drawing = false;
g.Dispose();
PicBoxAdmin.Invalidate();
}
private void PicBox_MouseMove(object sender, MouseEventArgs e)
{
if (!drawing)
{
return; //тут 3 процедуры на рисование - движение мыши, нажатая кнопка и отжатая
}
var finish = new Point(e.X, e.Y);
bm2 = new Bitmap(bm);
PicBoxAdmin.Image = bm2;
var pen = new Pen(Color.Black, 5f);
var g = Graphics.FromImage(bm2);
g.DrawLine(pen, start, finish);
g.Dispose();
PicBoxAdmin.Invalidate();
}