using system.drawing;

using system.drawing.imaging;

context.response.contenttype="image/jpeg";

string path=context.request.querystring["path"];

string vpath =context.server.mappath(path);

using(image img=image.fromfile(vpath))

{

string upath =context.server.mappath("1.jpg");

using(image uimg=image.fromfile(upath))

{

using(graphics g=graphics.fromfile(img))

{

g.drawimage(uimg,0,0);

img.save(context.response.outputstream,imageformat.jpeg);//绘制图片输出到响应流

}

}

}