各位博友,我在iis里面发布的网站为什么验证码显示不了,其它的都正常,权限也设置过了,就是显示不出来,但是在本地测试是可以的,发布的时候就出问题了。研究了好长时间,没有找到答案,麻烦哪位高手解答一下,小弟在此谢过了。
下面是权限设置,验证码页面是在后台的根目录里面。
<system.web> <authorization> <deny users="?"/> </authorization> </system.web> <location path="CheckCode.aspx"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location>
<location path="css"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="js"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="upload"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="rightcommon"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="js-global"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="loginskin"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="images"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location> <location path="images-global"> <system.web> <authorization> <allow users="*"/> </authorization> </system.web> </location>
下面我把验证码code贴上。
using System;using System.Collections;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Xml.Linq;using System.Drawing;using System.IO;using System.Drawing.Imaging;using System.Drawing.Drawing2D;using System.Drawing.Printing;
public partial class Admin_CheckCode : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { CreateCheckCodeImage(GenerateCheckCode()); }
private string GenerateCheckCode() { int number; string strCode = string.Empty;
//随机数种子 Random random = new Random();
for (int i = 0; i < 4; i++) //校验码长度为4 { //随机的整数 number = random.Next();
//字符从0-9,A-Z中随机产生,对应的ASCII码分别为 //48-57,65-90 number = number % 36; if (number < 10) { number += 48; } else { number += 55; } strCode += ((char)number).ToString(); }
//在session中保存校验码 Session["CheckCode"] = strCode; return strCode; }
/// <summary> /// 根据校验码输出图片 /// </summary> /// <param name="checkCode">产生的随机校验码</param> private void CreateCheckCodeImage(string checkCode) { //若校验码为空,则直接返回 if (checkCode == null || checkCode.Trim() == String.Empty) { return; } //根据校验码的长度确定输出图片的长度 System.Drawing.Bitmap image = new System.Drawing.Bitmap(55, 20);//(int)Math.Ceiling(Convert.ToDouble(checkCode.Length * 15)) //创建Graphics对象 Graphics g = Graphics.FromImage(image); try { //生成随机数种子 Random random = new Random(); //清空图片背景色 g.Clear(Color.White); //画图片的背景噪音线 10条 //--------------------------------------------------- for (int i = 0; i < 10; i++) { //噪音线起点坐标(x1,y1),终点坐标(x2,y2) int x1 = random.Next(image.Width); int x2 = random.Next(image.Width); int y1 = random.Next(image.Height); int y2 = random.Next(image.Height);
//用银色画出噪音线 g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2); } //--------------------------------------------------- //Brush b = Brushes.Silver; //g.FillRectangle(b, 0, 0, image.Width, image.Height); //---------------------以上两种任选其一------------------------------ //输出图片中校验码的字体: 12号Arial,粗斜体 Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
//线性渐变画刷 LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.Purple, 1.2f, true); g.DrawString(checkCode, font, brush, 2, 2);
//画图片的前景噪音点 50个 for (int i = 0; i < 50; i++) { int x = random.Next(image.Width); int y = random.Next(image.Height); image.SetPixel(x, y, Color.FromArgb(random.Next())); }
//画图片的边框线 g.DrawRectangle(new Pen(Color.Peru), 0, 0, image.Width - 1, image.Height - 1);
//创建内存流用于输出图片 using (MemoryStream ms = new MemoryStream()) { //图片格式指定为png image.Save(ms, ImageFormat.Jpeg); //清除缓冲区流中的所有输出 Response.ClearContent(); //输出流的HTTP MIME类型设置为"image/Png" Response.ContentType = "image/Jpeg"; //输出图片的二进制流 Response.BinaryWrite(ms.ToArray()); } } finally { //释放Bitmap对象和Graphics对象 g.Dispose(); image.Dispose(); } }}
4 回答
慕少森
TA贡献2019条经验 获得超9个赞
我在本地也没问题,但是我发现只要在Web.Config里面加上下面的代码的话,登录页面的验证码就无法显示了:
<authorization> <deny users="*"/> </authorization>
只要把这一句注释掉就能显示,不知什么原因。
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