C#实现坐标绘制与获取点示例

/// <summary>
        /// 获取画坐标轴所需的线
        /// </summary>
        /// <param name="xPts">x轴</param>
        /// <param name="yPts">y轴</param>
        /// <param name="strxPts">x轴文字和坐标字典，0，1，2，3...</param>
        /// <param name="stryPts">y轴文字和坐标字典</param>
        private void GetLines(ref List<Point[]> xPts, ref List<Point[]> yPts, ref Dictionary<string, PointF> strxPts, ref Dictionary<string, PointF> stryPts)
        {
            strxPts = new Dictionary<string, PointF>();
            stryPts = new Dictionary<string, PointF>();
            xPts = new List<Point[]>();
            yPts = new List<Point[]>();
            int sx = 25;
            int xtopY = 32;

            for (int i = 0; i < 100; i++)
            {
                sx += 6;
                if (i % 10 == 0)
                {
                    strxPts.Add(i.ToString(), new PointF(sx - (i.ToString().Length * 3 + 2), xtopY - 14));
                    xPts.Add(new Point[] { new Point(sx, xtopY - 2), new Point(sx, xtopY + 3) });
                }
                else
                {
                    xPts.Add(new Point[] { new Point(sx, xtopY), new Point(sx, xtopY + 3) });
                }
            }