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代码不多，直接粘贴了。
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<%@ WebHandler Language="C#"
Class="验证码"
%>using
System;using
System.Web;using
System.Drawing;public
class 验证码 : IHttpHandler{ public
void ProcessRequest(HttpContext context) { context.Response.ContentType = "image/jpeg"; string
code = GetCode();//获得随机数 using
(Image img = GetImg(code)) { img.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); } } private
Image GetImg(string
code) { Bitmap bit = new
Bitmap(90, 35); using
(Graphics g = Graphics.FromImage(bit)) { g.FillRectangle(Brushes.Brown, 0, 0, bit.Width, bit.Height); g.FillRectangle(Brushes.White, 1, 1, bit.Width - 2, bit.Height - 2); g.DrawString(code, new
Font("微软雅黑", 20), Brushes.Sienna, 3, 1); } return
bit; } //生成四位验证码 private
string GetCode() { string
code = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; string
str = ""; Random r = new
Random(); for
(int
i = 0; i < 4; i++) { int
index = r.Next(0, code.Length); str += code[index]; } return
str; } public
bool IsReusable { get { return
false; } }} |
在一般处理程序里写一个简单验证码,布布扣,bubuko.com
原文地址：http://www.cnblogs.com/hexd1230/p/3746718.html
