让Asp.Net输出图形-.NET教程,Asp.Net开发

<%@ page language="vb" debug="true" %>

<%@ import namespace="system.drawing" %>

<%@ import namespace="system.drawing.imaging" %>

<%@ import namespace="system.drawing.drawing2d" %>

<%

让asp.net输出图形.

欧阳东杰(oydj)原创.

qq:2596812

e-mail:loved@vip.sina.com

msn:xzskyweb@hotmail.com

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dim strfilename as string 声明变量,用于图片路径

dim i as system.drawing.image 创建.net框架图像处理对象实例

dim imgg1 as integer =cint(int((6 * rnd()) + 1)) 生成1-6的随机数

dim oydj as string=imgg1

strfilename ="d:\o123\"+oydj+".jpg" 载入的图片路径,这里的oydj代表随机生成的变量,用于生成随机图片

i = system.drawing.image.fromfile(strfilename)

dim b as new system.drawing.bitmap(i.width, i.height, pixelformat.format24bpprgb)

dim g as graphics = graphics.fromimage(b)

g.clear(color.blue) 背景色为蓝色

dim sss=request.servervariables("remote_addr")

g.drawimage(i,new point(0,0))

这里表示生成一个字符,9号宋体加粗白色,pointf(160,50)为在屏幕的坐标

g.drawstring(sss, new font("宋体",9,fontstyle.bold),new solidbrush(color.white),new pointf(160,50))

g.drawstring(sss, new font("宋体",9,fontstyle.bold),new solidbrush(color.white),new pointf(161,51))

response.contenttype="image/jpeg" 指定输出格式为图形

b.save(response.outputstream, imageformat.jpeg)

b.dispose()

%>

代码演示

http://www.ift99.com/pic3.aspx