验证码生成

关于验证码的生成，本人做了一个简单的Demo！

代码如下：

 public class RandomCode
    {
        /// <summary>
        /// 这个是使用字母,数字混合
        /// </summary>
        /// <param name="VcodeNum"></param>
        /// <returns></returns>
        public static string CreateRandomCode(int codeCount)
        {
            string allChar = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,W,X,Y,Z,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";
            string[] allCharArray = allChar.Split(',');
            string randomCode = "";
            int temp = -1;
            Random rand = new Random();
            for (int i = 0; i < codeCount; i++)
            {
                if (temp != -1)
                {
                    rand = new Random(i * temp * ((int)DateTime.Now.Ticks));
                }
                int t = rand.Next(61);
                if (temp == t)
                {
                    return CreateRandomCode(codeCount);
                }
                temp = t;
                randomCode += allCharArray[t];
            }

            return randomCode;
        }
    }

控制器

[OutputCache(Duration =5)]
        public ActionResult Index()
        {
                                         //设置二维码是几位的
            ViewBag.list = RandomCode.CreateRandomCode(6);
            return View();
        }    

视图

 <p>您的随机验证码为:</p> @ViewBag.list