CsvHelper创建空白文件

如何解决CsvHelper创建空白文件

我需要从Collection创建一个.csv或.txt文件。我正在使用CsvHelper库，并且开发了以下扩展方法：

public static class CsvWriter
    {
        public static void Write<TMapping,TModel>(this IEnumerable<TModel> items,string fullname,string separator,Encoding encoding,string culture)
            where TMapping : ClassMap,new()
        {
            var inputFileDescription = new CsvConfiguration(new CultureInfo(culture))
            {
                Delimiter = separator,Encoding = encoding,IgnoreBlankLines = true
            };


            using (var sr = new StreamWriter(fullname))
            using (var csv = new CsvHelper.CsvWriter(sr,inputFileDescription))
            {
                sr.AutoFlush = true;

                csv.Configuration.RegisterClassMap<TMapping>();
                csv.WriteRecords(items);

                csv.NextRecord();
            }
        }
    }

上面，遵循领域，模型和映射的类别：

 public class FuturesFiles 
    {
        public DateTime TradeDate { get; set; }
        public string BmfAccount { get; set; }
        public string Side { get; set; }
        public decimal Quantity { get; set; }
        public decimal? Strike { get; set; }
        public string Type { get; set; }
        public string Payout { get; set; }
        public decimal? Price { get; set; }
        public string Ticker { get; set; }
        public string broker { get; set; }
        public string Counterparty { get; set; }
        public string Desk { get; set; }
        public string Exchange { get; set; }
        public DateTime ArrivalDate { get; set; }
        public string Currency { get; set; }
        public int ContractId { get; set; }
}

public class FuturesFilesModel 
    {
        public DateTime TradeDate { get; set; }
        public string BmfAccount { get; set; }
        public string Side { get; set; }
        public decimal Quantity { get; set; }
        public decimal? Strike { get; set; }
        public string Type { get; set; }
        public string Payout { get; set; }
        public decimal? Price { get; set; }
        public string Ticker { get; set; }
        public string broker { get; set; }
        public string Counterparty { get; set; }
        public string Desk { get; set; }
        public string Exchange { get; set; }
        public DateTime ArrivalDate { get; set; }
        public string Currency { get; set; }
        public int ContractId { get; set; }

    }

public class FuturesFilesMappings : ClassMap<FuturesFilesModel>
    {
        public FuturesFilesMappings()
        {
            Map(i => i.TradeDate).Name("Trade Date").Index(1);
            Map(i => i.BmfAccount).Name("A/C Ref").Index(2);
            Map(i => i.Side).Name("B/S").Index(3);
            Map(i => i.Quantity).Name("Lots").Index(4);
            Map(i => i.Type).Name("Type").Index(5);
            Map(i => i.Payout).Name("Price").Index(6);
            Map(i => i.Price).Name("Price").Index(7);
            Map(i => i.Ticker).Name("Ric").Index(8);
            Map(i => i.broker).Name("Exec Firm Name").Index(9);
            Map(i => i.Counterparty).Name("Contraparte").Index(10);
            Map(i => i.Desk).Name("MESA").Index(11);
            Map(i => i.Exchange).Name("Exchange").Index(12);
            Map(i => i.ArrivalDate).Name("Delivery").Index(13);
            Map(i => i.Currency).Name("Curr").Index(14);
            Map(i => i.ContractId).Name("AGE").Index(15);

        }
    }

在存储库中，我具有上述用于调用Write函数以编写.csv文件的功能：

public class FuturesFilesRepository
    {      

        public void WriteCsvFile(string fileName,IEnumerable<FuturesFiles> futuresFiles)
        {
            var futuresFilesModel = futuresFiles.Select(oper =>
            {
                var model = new FuturesFilesModel();
                CreateModelFutures(oper,model);

                return model;
            }).ToList();


            futuresFilesModel.Write<FuturesFilesMappings,FuturesFilesModel>(fileName,";",System.Text.Encoding.UTF8,"pt-BR");
        }

        void CreateModelFutures(FuturesFiles oper,FuturesFilesModel model)
        {
            model.TradeDate = oper.TradeDate;
            model.Type = oper.Type;
            model.Ticker = oper.Ticker;
            model.Strike = oper.Strike;
            model.Side = oper.Side;
            model.Quantity = oper.Quantity;
            model.Price = oper.Price;
            model.Payout = oper.Payout;
            model.Exchange = oper.Exchange;
            model.Desk = oper.Desk;
            model.Currency = oper.Currency;
            model.Counterparty = oper.Counterparty;
            model.ContractId = oper.ContractId;
            model.broker = oper.broker;
            model.BmfAccount = oper.BmfAccount;
            model.ArrivalDate = oper.ArrivalDate;
        }

但是，无论我做什么或更改什么，要生成的文件总是空白。我已经看到了构建.csv编写器的其他方法，但是，我所看到的一切都与我正在尝试的工作非常相似。有人可以告诉我我在做什么错吗？