地球经纬 度与度分秒格式的转化

经纬度转换成为度分秒

 double dd = Convert.ToDouble(txtLB.Text);
            double du=0, fen=0, sec=0;
            double du_y = 0, fen_y = 0;
            du =(int)dd;
            du_y = dd %1;
            fen = (int)(du_y * 60);
            fen_y = (du_y*60) % 1;
            sec = (int)(fen_y * 60);
            label53.Text = string.Format("{0}  {1}  {2}", du, fen, sec);

度分秒转化为经纬度

  double[] du=new double[3];
            du[0] = Convert.ToDouble(textBox39.Text);
            du[1] = Convert.ToDouble(textBox40.Text);
            du[2] = Convert.ToDouble(textBox41.Text);
            label54.Text= du[0] + (du[1] / 60) + (du[2] /3600)+"";