JYHB-WCS/src/Khd.Core.Wcs/SystemData.cs

using Khd.Core.EntityFramework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Khd.Core.Wcs
{
    public class SystemData
    {
        public static long _serialNo { get; set; } = 1;

        public static object serialLock = new object();

        public static long GetSerialNo(DefaultDbContext dbContext)
        {
            lock (serialLock)
            {
                List<long?> list = dbContext.WcsTask.Select(t => t.serialNo).ToList();
                while (list.Contains(_serialNo))
                {
                    _serialNo++;
                    if (_serialNo > 9999)
                    {
                        _serialNo = 1;
                    }
                }
                return _serialNo;
            }
        }

    }
}