1.测试程序在本地IIS开启网站之后,没有问题
2.在上传至虚拟服务器之后,在登录页面登录之后,输入错误的密码之后显示提示用户名密码错误(此判断正确),但是在输入正确的用户名密码之后却出现验证码错误!XXXnull的判断。费解
3.在前台登录页面用验证码是没有问题的。两个页面调用一个验证页面,一个页面有问题一个没有问题,但是在本地服务器测试上都没有问题
<%@ WebHandler Language="C#" Class="validateCode" %>
using System;
using System.Web;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
public class validateCode : IHttpHandler, System.Web.SessionState.IRequiresSessionState
{
static char[] character = { '0','1','2', '3', '4', '5', '6', '8', '9'/*, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' */};
public void ProcessRequest (HttpContext context) {
//ValidateCode gif = new ValidateCode();//初始化验证码生成类
// string valid = "";//定义随机数
// MemoryStream ms = gif.Create(out valid);//获取包括验证码图片的内存流
// context.Session ["gif"] =valid;//验证码存储在Session中,供验证。
// context.Response.ClearContent();//清空输出流
// context.Response.ContentType = "image/png";//输出流的格式
// context.Response.BinaryWrite(ms.ToArray());//输出
// context.Response.End();
string chkCode = string.Empty;
//颜色列表,用于验证码、噪线、噪点
Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.DarkBlue };
//字体列表,用于验证码
//string[] font = { "Times New Roman", "Book Antiqua", "Impact" };
Font font = new Font("Arial", 18);
//验证码的字符集,去掉了一些容易混淆的字符
//char[] character = { '2', '3', '4', '5', '6', '8', '9'/*, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' */};
Random rnd = new Random();
//生成验证码字符串
for (int i = 0; i < 4; i++)
{
chkCode += character[rnd.Next(character.Length)];
}
//保存验证码的
context.Session.Add("ValidateCode", chkCode.ToLower());
Bitmap bmp = new Bitmap(120, 30);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
//画噪线
for (int i = 0; i < 4; i++)
{
int x1 = rnd.Next(150);
int y1 = rnd.Next(30);
int x2 = rnd.Next(150);
int y2 = rnd.Next(30);
Color clr = color[rnd.Next(color.Length)];
g.DrawLine(new Pen(clr), x1, y1, x2, y2);
}
//画验证码字符串
for (int i = 0; i < chkCode.Length; i++)
{
//string fnt = font[rnd.Next(font.Length)];
Color clr = color[rnd.Next(color.Length)];
g.DrawString(chkCode[i].ToString(), font, new SolidBrush(clr), (float)i * 20 + 20, (float)6);
}
//画噪点
for (int i = 0; i < 100; i++)
{
int x = rnd.Next(bmp.Width);
int y = rnd.Next(bmp.Height);
Color clr = color[rnd.Next(color.Length)];
bmp.SetPixel(x, y, clr);
}
//清除该页输出缓存,设置该页无缓存
context.Response.Buffer = true;
context.Response.ExpiresAbsolute = System.DateTime.Now.AddMilliseconds(0);
context.Response.Expires = 0;
context.Response.CacheControl = "no-cache";
context.Response.AppendHeader("Pragma", "No-Cache");
//将验证码图片写入内存流,并将其以"image/Png" 格式输出
MemoryStream ms = new MemoryStream();
try
{
bmp.Save(ms, ImageFormat.Png);
context.Response.ClearContent();
context.Response.ContentType = "image/Png";
context.Response.BinaryWrite(ms.ToArray());
}
finally
{
//显式释放资源
bmp.Dispose();
g.Dispose();
}
}
public bool IsReusable {//不重用
get {
return false;
}
}
}