using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
using Security;
namespace Security
{
public partial class ValidateCode : ValidateBase
{
/// <summary>
/// 验证码长度
/// </summary>
private int codeLen = 5;
/// <summary>
/// 图片清晰度
/// </summary>
private int fineness = 85;
// 图片宽度
private int imgWidth = 80;
// 图片高度
private int imgHeight = 24;
// 字体家族名称
private string fontFamily = "Times New Roman";
// 字体大小
private int fontSize = 14;
// 字体样式
private int fontStyle = 0;
// 绘制起始坐标 X
private int posX = 0;
// 绘制起始坐标 Y
private int posY = 0;
protected void Page_Load(object sender, EventArgs e)
{
string validateCode = CreateValidateCode();//生成验证码 Bitmap bitmap = new Bitmap(imgWidth, imgHeight);// 生成BITMAP图像 DisturbBitmap(bitmap);// 图像背景 DrawValidateCode(bitmap, validateCode);// 绘制验证码图像 bitmap.Save(Response.OutputStream,ImageFormat.Gif);// 保存验证码图像,等待输出
}
/// <summary>
/// 生成验证码
/// </summary>
/// <returns></returns>
private string CreateValidateCode()
{
string validateCode = "";
Random random = new Random();// 随机数对象
for (int i = 0; i < codeLen; i++)
{
//int n = random.Next(26); // 26: a - z 字符
//validateCode += (char)(n + 65); // 将数字转换成大写字母 int n = random.Next(10); //数字
validateCode += n.ToString();
}
base.strValidate = validateCode;// 保存验证码
return validateCode;
}
/// <summary>
/// 图像背景
/// </summary>
/// <param name="bitmap"></param>
private void DisturbBitmap(Bitmap bitmap)
{
Random random = new Random();// 通过随机数生成
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
if (random.Next(90) <= this.fineness)
bitmap.SetPixel(i, j, Color.White);
}
}
}
/// <summary>
/// 绘制验证码图像,bitmap 图板,validateCode 验证码值
/// </summary>
/// <param name="bitmap"></param>
/// <param name="validateCode"></param>
private void DrawValidateCode(Bitmap bitmap, string validateCode)
{
Graphics g = Graphics.FromImage(bitmap);// 获取绘制器对象 Font font = new Font(fontFamily, fontSize, FontStyle.Bold);// 设置绘制字体 g.DrawString(validateCode, font, Brushes.Black, posX, posY);// 绘制验证码图像
}
}
}
这段代码是网页中验证码的代码,用CustomValidator控件怎么验证用户输入是否正确,用户输入框我用的是TextBox?请教大神啊,新手刚学,很多东西不懂。
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
using Security;
namespace Security
{
public partial class ValidateCode : ValidateBase
{
/// <summary>
/// 验证码长度
/// </summary>
private int codeLen = 5;
/// <summary>
/// 图片清晰度
/// </summary>
private int fineness = 85;
// 图片宽度
private int imgWidth = 80;
// 图片高度
private int imgHeight = 24;
// 字体家族名称
private string fontFamily = "Times New Roman";
// 字体大小
private int fontSize = 14;
// 字体样式
private int fontStyle = 0;
// 绘制起始坐标 X
private int posX = 0;
// 绘制起始坐标 Y
private int posY = 0;
protected void Page_Load(object sender, EventArgs e)
{
string validateCode = CreateValidateCode();//生成验证码 Bitmap bitmap = new Bitmap(imgWidth, imgHeight);// 生成BITMAP图像 DisturbBitmap(bitmap);// 图像背景 DrawValidateCode(bitmap, validateCode);// 绘制验证码图像 bitmap.Save(Response.OutputStream,ImageFormat.Gif);// 保存验证码图像,等待输出
}
/// <summary>
/// 生成验证码
/// </summary>
/// <returns></returns>
private string CreateValidateCode()
{
string validateCode = "";
Random random = new Random();// 随机数对象
for (int i = 0; i < codeLen; i++)
{
//int n = random.Next(26); // 26: a - z 字符
//validateCode += (char)(n + 65); // 将数字转换成大写字母 int n = random.Next(10); //数字
validateCode += n.ToString();
}
base.strValidate = validateCode;// 保存验证码
return validateCode;
}
/// <summary>
/// 图像背景
/// </summary>
/// <param name="bitmap"></param>
private void DisturbBitmap(Bitmap bitmap)
{
Random random = new Random();// 通过随机数生成
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
if (random.Next(90) <= this.fineness)
bitmap.SetPixel(i, j, Color.White);
}
}
}
/// <summary>
/// 绘制验证码图像,bitmap 图板,validateCode 验证码值
/// </summary>
/// <param name="bitmap"></param>
/// <param name="validateCode"></param>
private void DrawValidateCode(Bitmap bitmap, string validateCode)
{
Graphics g = Graphics.FromImage(bitmap);// 获取绘制器对象 Font font = new Font(fontFamily, fontSize, FontStyle.Bold);// 设置绘制字体 g.DrawString(validateCode, font, Brushes.Black, posX, posY);// 绘制验证码图像
}
}
}
这段代码是网页中验证码的代码,用CustomValidator控件怎么验证用户输入是否正确,用户输入框我用的是TextBox?请教大神啊,新手刚学,很多东西不懂。
if (tbyzm==base.strValidate)
{
args.IsValid=true;
}
else
{
arg.Isvalid=false;
}
这样对么?
{
Response.Write("<script language='javascript'>alert('验证码错误!');</script>");
}
<img src="CheckCode.aspx" height="25" width="45" /></td>