公司做的时无线定位，客户要求在平面图上作出一个轨迹图来。工作日浅，之前没做过类似的东西，不知道从何下手，而且公司里边就我一个开发，搞需求，后期实施都是我一个，所以问也就无从问起。想到C#里有一个画直线和圆的方法，觉得也能应用吧。经客户同意，两个无线站点间表示移动轨迹用直线连接。

下边是画点和直线的代码（点表示人所在位置，颜色表示状态，如：蓝色为正常，红色为报警）：

 private void Drawing(int x,int y,Color color) //x,y为当前移动到的坐标

        {

            if (startFlag == true) //startFlag 判断是否是第一次画

            {

                startFlag = false;

                btmLine = new Bitmap(@"D:\zthk\zthk\TwoFloor.jpg");//初始化直线位图图像

                //画一个圆点

                grp = Graphics.FromImage(bm);

                Pen pen = new Pen(new SolidBrush(color), 0.5f);//声明单色画笔

                Rectangle rg = new Rectangle(x, y, 8, 8);//初始化一个矩形

                grp.DrawEllipse(pen, rg);

                grp.FillEllipse(new SolidBrush(color), rg);

                //保存图片数据

                MemoryStream stream = new MemoryStream();

                bm.Save(stream, ImageFormat.Jpeg);

                //输出图片

                Response.Clear();

                Response.ContentType = "image/jpeg";

                Response.BinaryWrite(stream.ToArray());

            }

            else

            {

                grp = Graphics.FromImage(btmLine);

                try

                {

                    grp.DrawLine(penLine, new Point(startX, startY), new Point(x, y));

                    MemoryStream temp = new MemoryStream();

                    btmLine.Save(temp, ImageFormat.Jpeg);

                    MemoryStream Line = temp;

                    Bitmap btmPoint = new Bitmap(temp);//用之前的直线位图初始化点位图

                    btmLine = new Bitmap(Line);//重新初始化直线位图

                    grp = Graphics.FromImage(btmPoint);

                    Pen pen = new Pen(new SolidBrush(color), 0.5f);

                    Rectangle rg = new Rectangle(x, y, 8, 8);

                    grp.DrawEllipse(pen, rg);

                    grp.FillEllipse(new SolidBrush(color), rg);

                    //保存图片数据

                    MemoryStream consoleStream = new MemoryStream();

                    bm.Save(consoleStream, ImageFormat.Jpeg);

                    //输出图片

                    Response.Clear();

                    Response.ContentType = "image/jpeg";

                    Response.BinaryWrite(consoleStream.ToArray());

                }

                finally

                {

                    //释放资源

                    grp.Dispose();

                    bm.Dispose();

                    btmLine.Dispose();

                    btmPoint.Dispose();

                }

                startX = x;//记录X坐标

                startY = y;//记录Y坐标

            }

        }

 本人新手，请老鸟们多多指教。