如何使用FileHelper FieldOptional

Question

我已经添加了FieldOptional属性，但仍然会收到此错误

行：1栏：117。分隔符＆＃39;，＆＃39;在字段＆＃39; <TrackDate>k__BackingField＆＃39;之后找不到（记录的字段较少，分隔符错误或下一个字段必须标记为可选字段。＆＃34;

我的田野课程：

[DelimitedRecord(",")]

public class MaltaIn
{
    [FieldOrder(0)]
    public string MilesEventCode { get; set; }
    [FieldOrder(1)]
    public string MilesEventName { get; set; }
    [FieldOrder(2)]
    public string ThirdPartyEventCode { get; set; }
    [FieldOrder(3)]
    public string ThirdPartyEventName { get; set; }
    [FieldOrder(4)]
    public string ThirdPartyReasonCode { get; set; }
    [FieldOrder(5)]
    public string MilesRef { get; set; }
    [FieldOrder(6)]
    public string ThirdPartyRef { get; set; }
    [FieldOrder(7)]
    public string TrackDate { get; set; }

    [FieldOrder(8)]
    public string TrackTime { get; set; }

    [FieldOrder(9)]
    [FieldOptional]
    public string OrderNumber;

Answer 1

非常新手。我没看错:(

跟踪日期之后应该是

[FieldOrder(8)]
[FieldOptional]
public string TrackTime;