MVC验证码的编写

主要是相互学习一下mvc，希望各位大神指导

 1 /// <summary>
 2         /// 生成随机数字
 3         /// </summary>
 4         /// <returns>随机数字</returns>
 5         public string GetCode(int len = 4)
 6         {
 7             string strCode = string.Empty;
 8             char code;
 9             int num;
10             Random rnd = new Random();
11             for (int i = 0; i < len; i++)
12             {
13                 num = rnd.Next();
14                 if (num % 2 == 0)
15                 {
16                     code = (char)('0' + (char)(num % 10));
17                 }
18                 else
19                 {
20                     //code = (char)('0' + (char)(num % 10));
21                    code = (char)('A' + (char)(num % 26));
22                 }
23                 strCode += code.ToString();
24             }
25             return strCode;
26         }

生成随机数

 1         /// <summary>
 2         /// 生成验证码（保存验证码到图片）
 3         /// </summary>
 4         /// <returns>二进制</returns>
 5         public byte[] ProcessRequestImage(string validateCode)
 6         {
 7 
 8             HttpContext context = HttpContext.Current;
 9             using (Bitmap bmp = new Bitmap(validateCode.Length * 15 + 10, 28))
10             {
11                 Graphics g = Graphics.FromImage(bmp);
12                 g.Clear(Color.White);
13                 Random rnd = new Random();
14                 for (int i = 0; i < 2; i++)
15                 {
16                     int x1 = rnd.Next(bmp.Width);
17                     int y1 = rnd.Next(bmp.Height);
18                     int x2 = rnd.Next(bmp.Width);
19                     int y2 = rnd.Next(bmp.Height);
20                     g.DrawLine(new Pen(Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255))), x1, y1, x2, y2);
21                 }
22                 g.DrawRectangle(new Pen(Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255))), new Rectangle(0, 0, bmp.Width - 1, bmp.Height - 1));
23                 for (int i = 0; i < 25; i++)
24                 {
25                     bmp.SetPixel(rnd.Next(bmp.Width), rnd.Next(bmp.Height), Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255)));
26                 }
27                 for (int i = 0; i < validateCode.Length; i++)
28                 {
29                     FontFamily[] familys = FontFamily.Families;
30                     FontFamily family = familys[rnd.Next(familys.Length)];
31                     g.DrawString(validateCode[i].ToString(), new Font(family, 14, FontStyle.Bold), new SolidBrush(Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255))), new PointF(1 + i * 15, 1));
32                 }
33 
34                 //保存图片数据
35                 MemoryStream stream = new MemoryStream();
36                 bmp.Save(stream, ImageFormat.Jpeg);
37 
38                 //  输出图片流
39                 return stream.ToArray();
40             }
41         }

生成验证码图片

 1      /// <summary>
 2         /// 验证码
 3         /// </summary>
 4         /// <returns></returns> 
 5         public ActionResult VerifyCode()
 6         {
 7             h.Base.Public.SecurityCode seCode = new h.Base.Public.SecurityCode();
 8             var code = seCode.GetCode();
 9             Session["code"] = code;
10             var bytes = seCode.ProcessRequestImage(code);
11             return File(bytes, "image/jpeg");
12         }

控制器代码

 1   <div class="pdiv">
 2                 <input type="image" id="valiCode"     src="/Based/VerifyCode" />
 3 </div>
 4 
 5 <script>
 6     (function () {
 7   //刷新验证码
 8         var codeUrl = "/Based/VerifyCode";
 9         $(valiCode).on("click", function () {
10             this.src = codeUrl + "?time=" + (new Date()).getTime();
11         });
12 
13     })(jQuery)
14 </script>

view视图代码

这段代码我测试过了。。是可以通过的。

posted on 2014-04-22 18:41 月舞弦动阅读(381) 评论(1) 编辑收藏举报