生成随机密码

导入下面的命名空间

using System.Security.Cryptography;

==============代码=====================

        protected string RndPwd()
        {
            int[] arr = new int[]{ 1, 2, 3, 4, 5, 6, 7, 8, 9,6,6,8,8,9,9,1 };

            var r = new RNGCryptoServiceProvider();
            var bytes = new byte[arr.Length * 2];
            r.GetBytes(bytes);
           
            for (int i = 0; i < bytes.Length; i+=2)
            {
                int tmp = 0;

                int index1 = bytes[i] % arr.Length;
                int index2 = bytes[i+1] % arr.Length;
               
                tmp=arr[index1];
                arr[index1] = arr[index2];
                arr[index2] = tmp;

            }
            return arr.Aggregate("",(total,ent ) => total += string.Format("{0}", ent)).Substring(0,6);
        }