Question

我有这段代码：

using (StreamWriter writer = new StreamWriter("C:\\Users\\HP8200\\Desktop\\teste.txt"))
{            
    string numcont = _transaction.PartyFederalTaxID;
    double numenc = _transaction.BillToPartyID;
    double numfatura = _transaction.TransDocNumber;
    DateTime data = _transaction.CreateDate;
    double valor = _transaction.TotalAmount;
    short zona = transaction.Zone.ZoneID;
    //preçoantesdisc mal
    double precoantesdisc = _transaction.TotalPaymentDiscountAmount;
    double preconet = transaction.Details.TotalAdvancementNetAmount;
    double quantidade = transaction.Details.Count;
    double bonus = _transaction.TotalPaymentDiscountAmount;
    string valorStr = valor.ToString(CultureInfo.InvariantCulture);

    foreach (ItemTransactionDetail detail in transaction.Details)
    {
        var item = MyApp.DSOCache.ItemProvider.GetItem(detail.ItemID, MyApp.SystemSettings.BaseCurrency);
        double taxRate = MyApp.DSOCache.TaxesProvider.GetTaxRateFromTaxableGroupID(detail.TaxableGroupID, "PRT", "CON");
        string barcode = item.BarCode;
        item = null;

        writer.WriteLine($"{numcont};{numenc};{numfatura};{data.ToString("dd/MM/yyyy")};{valorStr};{zona};{Environment.NewLine}{barcode};{taxRate};{precoantesdisc};{preconet};{quantidade};{bonus}");
    }

}
MessageBox.Show("gravou");

它将一些变量写入文本文件。当我向其中添加2个或更多项时，文本将重复第一行。我需要删除第三行的第一行。（通过第一行和第二行，我的意思是直到{Environment.NewLine}）。有可能吗？

Answer 1

您可以完全控制重复的行，因此您应该修复而不是返回并尝试将其从结果中删除：

writer.WriteLine($"{numcont};{numenc};{numfatura};{data:dd/MM/yyyy)};{valorStr};{zona};");
foreach (ItemTransactionDetail detail in transaction.Details)
{
    var item = MyApp.DSOCache.ItemProvider.GetItem(detail.ItemID, MyApp.SystemSettings.BaseCurrency);
    double taxRate = MyApp.DSOCache.TaxesProvider.GetTaxRateFromTaxableGroupID(detail.TaxableGroupID, "PRT", "CON");
    string barcode = item.BarCode;
    //item = null;  //not necessary - GC will take care of this

    writer.WriteLine($"{barcode};{taxRate};{precoantesdisc};{preconet};{quantidade};{bonus}");
}

从我的文本文件中删除一行

1 个答案: