验证码图片未显示[无错误] [英] Captcha Image not showing[Error free]
本文介绍了验证码图片未显示[无错误]的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已按照 http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx上的指南进行操作. [ ^ ]
我已经重命名了我的命名空间，同时也注释掉了受保护的UI控件的3行.
JpegImage.aspx
内部的代码
I have followed the guide at http://www.codeproject.com/KB/aspnet/CaptchaImage.aspx[^]
I''ve renamed my namespace, comment out the 3 lines of protected UI controls also.
code inside JpegImage.aspx
<%@ Page Language="C#" AutoEventWireup="false" CodeBehind="JpegImage.aspx.cs" Inherits="CaptchaImage.JpegImage" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Jpeg Image</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</head>
<body>
<form id="JpegImage" method="post" runat="server">
</form>
</body>
</html>
JpegImage.aspx
后面的代码
the codes behind JpegImage.aspx
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace JoyConnectionApp
{
public partial class JpegImage : System.Web.UI.Page
{
private void Page_Load(object sender, System.EventArgs e)
{
// Create a CAPTCHA image using the text stored in the Session object.
CaptchaImage ci = new CaptchaImage(this.Session["CaptchaImageText"].ToString(), 200, 50, "Century Schoolbook");
// Change the response headers to output a JPEG image.
this.Response.Clear();
this.Response.ContentType = "image/jpeg";
// Write the image to the response stream in JPEG format.
ci.Image.Save(this.Response.OutputStream, ImageFormat.Jpeg);
// Dispose of the CAPTCHA image object.
ci.Dispose();
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}
我的主要形式 .cs
My main form .cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace JoyConnectionApp
{
public partial class AddGuardian : System.Web.UI.Page
{
//protected System.Web.UI.WebControls.TextBox tbxCAPTCHA;
//protected System.Web.UI.WebControls.Button Button1;
//protected System.Web.UI.WebControls.Label lblANS;
// For generating random numbers.
private Random random = new Random();
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
// Create a random code and store it in the Session object.
this.Session["CaptchaImageText"] = GenerateRandomCode();
else
{
// On a postback, check the user input.
if (this.tbxCAPTCHA.Text == this.Session["CaptchaImageText"].ToString())
{
// Display an informational message.
this.lblANS.CssClass = "info";
this.lblANS.Text = "Correct!";
}
else
{
// Display an error message.
this.lblANS.CssClass = "error";
this.lblANS.Text = "ERROR: Incorrect, try again.";
// Clear the input and create a new random code.
this.tbxCAPTCHA.Text = "";
this.Session["CaptchaImageText"] = GenerateRandomCode();
}
}
}
// Returns a string of six random digits.
//
private string GenerateRandomCode()
{
string s = "";
for (int i = 0; i < 6; i++)
s = String.Concat(s, this.random.Next(10).ToString());
return s;
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
主页.aspx
The main page .aspx
<td class="style4">
</td>
<td colspan="2">
<img src="JpegImage.aspx">
</td>
推荐答案
请访问以下文章
ASP.NET中的CAPTCHA图形 [投票":thumbsup:如果有帮助，请提供"接受答案"，如果这是正确的答案.:rose:
谢谢，
Imdadhusen
Hi,
Please visit following Article
CAPTCHA Graphic in ASP.NET[^]
Please do let me know, if you have any doubt.
Please provide "Vote":thumbsup: if this would be helpful, and make "Accept Answer" if this would be correct answer.:rose:
Thanks,
Imdadhusen
我已经解决了.感谢您的链接Imdadhusen.我的命名空间有误，这就是它没有通过的原因.
I''ve solved it already. Thanks for the link Imdadhusen. My namespace was wrong that''s why it didn''t go through.
这篇关于验证码图片未显示[无错误]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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