using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IoTIntegrationPlatform.Common
{
    /// <summary>
    /// 随机数
    /// </summary>
    public static class RandomHelper
    {
        /// <summary>
        /// 生成指定长度的随机数
        /// </summary>
        /// <param name="length"></param>
        /// <returns></returns>
        public static string GenerateRandomStr(int length)
        {
            StringBuilder sb = new StringBuilder();
            try
            {
                //const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
                const string chars = "ABCDEF0123456789";
                Random rand = new Random();
                for (int i = 0; i < length; i++) // 生成指定长度的随机字符串  
                {
                    sb.Append(chars[rand.Next(chars.Length)]);
                }
            }
            catch (Exception ex)
            {
                Logging.Error(ex, ex.Message);
            }
            return sb.ToString();
        }

    }
}