GDI+绘制简单的图形

protected void Page_Load(object sender, EventArgs e)
        {
            /*
                首先需要引用的命名空间是：System.Drawing;
            */
            GraphicsImage();
        }

        private void GraphicsImage()
        {
            int width = 800, hight = 400;
            Bitmap image = new Bitmap(width, hight);
            Graphics g = Graphics.FromImage(image);  //创建一个高200，宽440的画布

            try
            {
                g.Clear(Color.LightBlue);   //清空背景色

                /*在画布上写字*/
                Font font1 = new Font("宋体", 10);  //设置字体类型和大小
                Brush brush = new SolidBrush(Color.Black);  //设置画刷颜色           
                g.DrawString("我的GDI+测试", font1, brush, 100, 20);

                Pen pen = new Pen(Color.Brown, 1);  //创建画笔对象

                /*在画布上画线*/
                g.DrawLine(pen, 4, 80, 600, 80);  //绘制直线

                /*在画布上画矩形*/
                g.DrawRectangle(pen, 100, 120, 45, 100);  //绘制矩形

                /*在画布上画多边形*/
                Point[] points = new Point[5];
                points[0].X = 300; points[0].Y = 60;
                points[1].X = 250; points[1].Y = 80;
                points[2].X = 300; points[2].Y = 100;
                points[3].X = 350; points[3].Y = 100;
                points[4].X = 600; points[4].Y = 80;
                g.DrawPolygon(pen, points); //绘制多边形

                g.DrawEllipse(pen, 50, 60, 80, 80);
                //绘制椭圆形
                g.DrawEllipse(pen, 150, 80, 100, 40);
                //绘制扇形
                g.DrawPie(pen, 270, 60, 100, 100, 180, 130);


                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
                Response.ClearContent();
                Response.ContentType = "image/Gif";
                Response.BinaryWrite(ms.ToArray());
            }
            catch (Exception ms)
            {
                Response.Write(ms.Message);
            }
        }