C#.NET：使用 % 转换器读取 CSV

Question

我正在阅读 CSV 文件

Name,Score
Pat,99%
Chris,87%

并希望在通过 FileHelpers 读取文件时丢弃百分号

using FileHelpers;

public class PctConverter : ConverterBase
{
    private NumberFormatInfo nfi = new NumberFormatInfo();

    public PctConverter()
    {
        nfi.PercentSymbol = "%";
    }

    public override object StringToField(string from)
    {
        return decimal.Parse(from, NumberStyles.Percent, nfi);
    }
}

[DelimitedRecord(",")]
[IgnoreFirst]
public class Student
{
    public string Name { get; set; }
    public decimal Score { get; set; }
}

var student_file = "students.csv";
var engine = new FileHelperEngine<Student>();
engine.ErrorManager.ErrorMode = ErrorMode.SaveAndContinue;
List<Student> students = engine.ReadFileAsList(student_file);
ErrorInfo[] readingErrors = engine.ErrorManager.Errors;

但是我的转换器不太正确。 你能建议为什么吗？

Answer 1

您需要在要转换的字段上指定转换器，而且您的转换器对我不起作用，所以我简化了一点：

public class PctConverter : ConverterBase
{
    public override object StringToField(string from)
    {
        return decimal.Parse(from.Replace("%", ""));
    }
}

[DelimitedRecord(",")]
[IgnoreFirst]
public class Student
{
    public string Name { get; set; }

    [FieldConverter(typeof(PctConverter))]
    public decimal Score { get; set; }
}