ASP上传图片文件，生成缩略图，并写上版权信息-ASP教程,ASP应用

 private void button1_click(object sender, system.eventargs e)
{
if(file1.postedfile.filename!=null)
{
string namestr = path.getfilename(file1.postedfile.filename);//提取文件名
file1.postedfile.saveas(server.mappath(“.”)+@”\”+namestr);
image2.visible=true;
image2.imageurl=server.mappath(“.”)+@”\”+namestr;
system.drawing.image image,anewimage;
image=system.drawing.image.fromstream(file1.postedfile.inputstream);
decimal width=image.width;
decimal height=image.height;
int newwidth,newheight;
if(width>height)
{
newwidth=150;
newheight=(int)(height/width*150);
}
else
{
newheight=150;
newwidth=(int)(width/height*150);
}
anewimage=image.getthumbnailimage(newwidth,newheight,null,intptr.zero);
bitmap output=new bitmap(anewimage);
graphics g=graphics.fromimage(output);
g.drawstring(textbox1.text.trim(),new font(“courier new”, 9),new solidbrush(color.red),60,60);//写版权信息及文本格式及位置
output.save(server.mappath(“.”)+@”\s_”+namestr,system.drawing.imaging.imageformat.jpeg);
image1.visible=true;
image1.imageurl=server.mappath(“.”)+@”\s_”+namestr;
}
}