handler画图制作图片水印
电脑版发表于:2019/3/14 9:06
handler画图制作图片水印,版权申明什么的,直接上代码
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//构建一个图片
Bitmap bitmap = new Bitmap(context.Server.MapPath("~/img/mm.jpg"));
//给图片关联一个画图类
Graphics grap = Graphics.FromImage(bitmap);
Font font = new Font("宋体", 13);
SolidBrush probrush = new SolidBrush(Color.Purple);
SolidBrush redbrush = new SolidBrush(Color.Red);
grap.DrawString("放开那个女孩", font, redbrush, 30, 30);
//画笔
Pen redpen = new Pen(redbrush, 2);
Pen propen = new Pen(probrush, 2);
//画直线
grap.DrawLine(redpen, 20, 20, 140, 140);
grap.DrawLine(redpen, 140, 60, 140, 140);
grap.DrawLine(redpen, 60, 140, 140, 140);
//画图椭圆(根据矩形来截取得椭圆)
grap.DrawEllipse(propen, 30, 30, 100, 100);
//画矩形
grap.DrawRectangle(redpen, 30, 30, 150, 100);
//输出图片(借助流,输出流)
bitmap.Save(context.Response.OutputStream, ImageFormat.Jpeg);
}一点效果:

