LIOT/EMIS.CommonLogic/SystemServices/AlipayServices.cs

using EMIS.ViewModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace EMIS.CommonLogic.SystemServices
{
    public class AlipayServices : BaseServices, IAlipayServices
    {
        public Lazy<IParameterServices> ParameterServices { get; set; }

        public string GetProductId()
        {
            DateTime today = DateTime.Today;
            string productId = ParameterServices.Value.GetParameterValue(CF_ParameterType.AlipayProductId);

            int seed = 1;
            if (productId != null)
            {
                if (productId.Substring(2, 8) == today.ToString("yyyyMMdd"))
                {
                    seed = Convert.ToInt32(productId.Substring(10, productId.Length - 10)) + 1;
                }
            }

            productId = "ap" + today.ToString("yyyyMMdd") + seed.ToString().PadLeft(6, '0');
            ParameterServices.Value.SaveTo(CF_ParameterType.AlipayProductId, productId);

            return productId;
        }
    }
}