ASP.NET 画图与图像处理－写字与画线

Bitmap srcImg = new Bitmap(300, 300); //也可以读入一张图片
Graphics graphics = Graphics.FromImage(srcImg);

Font font = new Font("宋体", 16); //字体与大小
Brush brush = new SolidBrush(Color.Red);
graphics.DrawString("www.itpow.com", font, brush, 50, 50); //写字，最后两个参数表示位置

Pen pen = new Pen(Color.FromArgb(33, 66, 99), 10); //颜色与宽度
Point[] pts = new Point[3]; //曲线的点
pts[0] = new Point(120, 130);
pts[1] = new Point(140, 280);
pts[2] = new Point(200, 100);
graphics.DrawCurve(pen, pts); //画曲线

srcImg.Save(Server.MapPath("example.jpg"));

graphics.Dispose();
srcImg.Dispose();

System.Drawing