private void Form1_Paint(object sender, PaintEventArgs e)

        {



            Graphics dc = e.Graphics;

            dc.PageScale = more;

            dc.TranslateTransform(this.AutoScrollPosition.X, this.AutoScrollPosition.Y);

            for (int i = 0; i < 400; ++i)

            {

                for (int j = 0; j < 400; ++j)

                {

                    switch (txt[i, j])

                    {

                        case '.':

                            draw(dc, Brushes.Gray, j, i);  //灰色

                            break;

                        case '0':

                            draw(dc, Brushes.White, j, i);  //白色

                            break;

                        case '1':

                            draw(dc, Brushes.LightBlue, j, i);  //浅蓝色

                            break;

                        case '9':

                            draw(dc, Brushes.DarkBlue, j, i);  //深蓝色

                            break;

                        default:

        &nb