1、制作验证码：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Soft.Common;
namespace Soft.Controller
{
///<summary>
/// 生成验证码的类
///</summary>
public class ValidateCode
{
/// <summary>
/// 保存验证码的cookie名字
/// </summary>
public static string ValidateCodeCookieName
{
get
{
return "SoftValidateCode";
}
}
/// <summary>
/// 生成验证码
/// </summary>
/// <returns></returns>
public static string CreateValidateCode()
{
string checkCode = String.Empty;
System.Random random = new Random();
for (int i = 0; i < 4; i++)
{
checkCode += random.Next(0,9).ToString();
}
SessionCookieHelper.SetCookie(ValidateCodeCookieName, checkCode);
return checkCode;
}
///<summary>
/// 创建验证码的图片
///</summary>
///<param name="containsPage">要输出到的page对象</param>
///<param name="validateNum">验证码</param>
public static byte[] CreateValidateGraphic(string validateCode)
{
Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 22);
Graphics g = Graphics.FromImage(image);
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
g.Clear(Color.White);
//画图片的干扰线
for (int i = 0; i < 25; i++)
{
int x1 = random.Next(image.Width);
int x2 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int y2 = random.Next(image.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));
LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),
Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(validateCode, font, brush, 3, 2);
//画图片的前景干扰点
for (int i = 0; i < 100; 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.Silver), 0, 0, image.Width - 1, image.Height - 1);
//保存图片数据
MemoryStream stream = new MemoryStream();
image.Save(stream, ImageFormat.Jpeg);
//输出图片流
return stream.ToArray();
}
finally
{
g.Dispose();
image.Dispose();
}
}
}
}
2、新建一个验证码控制器和视图：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Soft.Controller;
namespace SoftWeb.Controllers
{
public class ValiteController : Controller
{
//
// GET: /Valite/
public ActionResult Index()
{
return File(ValidateCode.CreateValidateGraphic(ValidateCode.CreateValidateCode()), @"image/jpeg");
}
}
}
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<div>
</div>
</body>
</html>
3、使用时：
<img: src="XXXXXX" ... />
时间： 2024-11-10 23:33:30