1     public class RandomHelper
 2     {
 3         /// <summary>
 4         ///生成制定位数的随机码（数字）
 5         /// </summary>
 6         /// <param name="length"></param>
 7         /// <returns></returns>
 8         public static string GenerateRandomCode(int length)
 9         {
10             var result = new StringBuilder();
11             for (var i = 0; i < length; i++)
12             {
13                 var r = new Random(Guid.NewGuid().GetHashCode());
14                 result.Append(r.Next(0, 10));
15             }
16             return result.ToString();
17         }
18     }