该怎么使用asp.net画出正弦曲线呢
改怎么样使用asp.net画出正弦曲线呢，求大神求思路 ASP.NET
[解决办法]

 try
        {
            using (Bitmap sinImage = new Bitmap(360, 120))
            {

                using (Graphics myGraphics = Graphics.FromImage(sinImage))
                {

                    myGraphics.Clear(Color.White);
                    myGraphics.SmoothingMode = SmoothingMode.AntiAlias;
                    Rectangle r1 = new Rectangle(0, 0, 360, 20);
                    Rectangle r2 = new Rectangle(0, 20, 360, 40);
                    Rectangle r3 = new Rectangle(0, 60, 360, 40);
                    Rectangle r4 = new Rectangle(0, 100, 360, 20);

                    Brush brush1 = new SolidBrush(Color.White);
                    Brush brush2 = new SolidBrush(Color.SkyBlue);
                    Brush brush3 = new SolidBrush(Color.Pink);
                    Brush brush4 = new SolidBrush(Color.YellowGreen); 
 

                    myGraphics.FillRectangle(brush1, r1);
                    myGraphics.FillRectangle(brush2, r2);
                    myGraphics.FillRectangle(brush2, r3);
                    myGraphics.FillRectangle(brush1, r4);

                    myGraphics.DrawString("0", new Font("宋体", 8), brush1, new PointF(3, 65));
                    myGraphics.DrawString("90", new Font("宋体", 8), brush1, new PointF(85, 65));
                    myGraphics.DrawString("180", new Font("宋体", 8), brush1, new PointF(170, 65));
                    myGraphics.DrawString("360", new Font("宋体", 8), brush1, new PointF(336, 65));

                    Point myPoint = new Point(0, 60);
                    float sinValue = 0.0F;
                    for (int i = 0; i < 360; i++)
                    {
                        sinValue = Convert.ToSingle(Math.Sin(Convert.ToSingle((i * Math.PI) / 180))) * 40;

                        //事实上，这里根本无需注意 sinValue 的正负
                        //当其为负时，  60-sinValue 则会变大
                        Point thisPoint = new Point(i, Convert.ToInt32(60 - sinValue)); 
 
                        myGraphics.DrawLine(new Pen(brush3), thisPoint, myPoint);
                        myPoint = thisPoint;
                    }
                }
                using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
                {
                    System.Web.HttpContext.Current.Response.ContentType = "Image/PNG";
                    System.Web.HttpContext.Current.Response.Clear();
                    System.Web.HttpContext.Current.Response.BufferOutput = true;
                    sinImage.Save(ms, ImageFormat.Png);
                    ms.Flush();
                    System.Web.HttpContext.Current.Response.BinaryWrite(ms.GetBuffer());
                }
            }
        }
        catch
        {
            return;
        }

        }