C# 如何使FileHelper忽略定义列之后的列？（即忽略末尾的列）

假设我有以下FileHelpers记录定义：

[DelimitedRecord(",")]
[IgnoreEmptyLines]
public class TestRecord
{
    [FieldCaption("A")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string A;

    [FieldCaption("B")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string B;

    [FieldCaption("C")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string C;
}

我只对A、B、C列感兴趣。它们后面的任何列都可以忽略。例如，我希望能够处理如下数据：

A,B,C,D,E
TestA1,TestB1,TestC1,TestD1,TestE1
TestA2,TestB1,TestC1,TestD1,TestE1

或：

或：

---

只需在类的末尾添加一个额外的

string[]

字段，并将其标记为

[FieldOptional]

[DelimitedRecord(",")]
[IgnoreEmptyLines]
public class TestRecord
{
    [FieldCaption("A")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string A;

    [FieldCaption("B")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string B;

    [FieldCaption("C")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string C;

    [FieldOptional]
    public string[] EverythingElse;
}

class Program
{
    static void Main(string[] args)
    {
        var engine = new FileHelperEngine<TestRecord>();
        var records = engine.ReadString("TestA1,TestB1,TestC1,TestD1,TestE1");
        
        Debug.Assert(records.Count() == 1);
        Debug.Assert(records[0].A == "TestA1");
        Debug.Assert(records[0].B == "TestB1");
        Debug.Assert(records[0].C == "TestC1");

        Console.WriteLine("All OK");
        Console.ReadLine();
    }
}

[分隔符记录（“，”）]
[无知的人]
公共类测试记录
{
[现场字幕（“A”）]
[FieldQuoted（QuoteMode.OptionalForEarth）]
公共字符串A；
[现场字幕（“B”）]
[FieldQuoted（QuoteMode.OptionalForEarth）]
公共字符串B；
[字段标题（“C”）]
[FieldQuoted（QuoteMode.OptionalForEarth）]
公共字符串C；
[字段可选]
公共字符串[]其他所有内容；
}
班级计划
{
静态void Main（字符串[]参数）
{
var engine=new FileHelperEngine（）；
var records=engine.ReadString（“test1、TestB1、TestC1、TestD1、test1”）；
Debug.Assert（records.Count（）==1）；
Assert（记录[0].A==“TestA1”）；
Assert（记录[0].B==“TestB1”）；
Assert（记录[0].C==“TestC1”）；
Console.WriteLine（“一切正常”）；
Console.ReadLine（）；
}
}

A,B,C
TestA1,TestB1,TestC1
TestA2,TestB1,TestC1

[DelimitedRecord(",")]
[IgnoreEmptyLines]
public class TestRecord
{
    [FieldCaption("A")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string A;

    [FieldCaption("B")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string B;

    [FieldCaption("C")]
    [FieldQuoted(QuoteMode.OptionalForBoth)]
    public string C;

    [FieldOptional]
    public string[] EverythingElse;
}

class Program
{
    static void Main(string[] args)
    {
        var engine = new FileHelperEngine<TestRecord>();
        var records = engine.ReadString("TestA1,TestB1,TestC1,TestD1,TestE1");
        
        Debug.Assert(records.Count() == 1);
        Debug.Assert(records[0].A == "TestA1");
        Debug.Assert(records[0].B == "TestB1");
        Debug.Assert(records[0].C == "TestC1");

        Console.WriteLine("All OK");
        Console.ReadLine();
    }
}