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

namespace IStation.Untity
{
    /// <summary>
    /// 特殊long列表辅助类
    /// </summary>
    public class SpecialLongListHelper
    {
        /// <summary>
        /// 分隔符
        /// </summary>
        public const string Separator = ",";

        /// <summary>
        /// To 列表
        /// </summary>
        public static List<long> ToList(string str)
        {
            if (string.IsNullOrEmpty(str))
                return new List<long>();
            var list = str.Split(new string[] { Separator }, StringSplitOptions.RemoveEmptyEntries);
            return list.Select(x => long.Parse(x)).ToList();
        }

        /// <summary>
        /// To 字符串
        /// </summary>
        public static string ToString(List<long> list)
        {
            if (list == null || list.Count < 1)
                return string.Empty;
            var sb = new StringBuilder();
            sb.Append(Separator);
            foreach (var item in list) 
            {
                sb.Append(item.ToString());
                sb.Append(Separator);
            }
            return sb.ToString();
        }


    }
}