CsvHelper 在最后 value/column 之后添加 `;`

Question

是否有任何配置可以让我在最后一个值后添加 ;？

FirstName;SecondName
A;B

我需要它

FirstName;SecondName;
A;B;

这是我的代码：

using (TextWriter writer = new StreamWriter(fd.FileName, false, System.Text.Encoding.UTF8))
{
    var csv = new CsvWriter(writer, new CsvConfiguration(CultureInfo.InvariantCulture)
    {
        Delimiter = ";",
    });

    csv.Configuration.RegisterClassMap<DataRowClassMap>();
    csv.WriteRecords(_rows);
}

提前致谢

编辑。地图Class

public sealed class DataRowClassMap : ClassMap<DataRow>
{
    public DataRowClassMap()
    {
        Map(m => m.ListingNumber).Ignore();
        Map(m => m.FirstName).Index(0).Name("FirstName");
        Map(m => m.LastName).Index(1).Name("LastName");
    }
}

Answer 1

第一个解决方案 - 循环：

using (TextWriter writer = new StreamWriter(fd.FileName, false, System.Text.Encoding.UTF8))
{
    var csv = new CsvWriter(writer, new CsvConfiguration(CultureInfo.InvariantCulture)
    {
        Delimiter = ";",
    });

    csv.Configuration.RegisterClassMap<DataRowClassMap>();

    csv.WriteHeader<DataRow>(); // write headers
    csv.WriteField(""); // it will be `;` in file
    csv.NextRecord();

    foreach (var item in _rows)
    {
        csv.WriteRecord(item); // actual data 
        csv.WriteField(""); // it will be `;` in file
        csv.NextRecord();
    }
}

第二种解决方案 - hack，创建新的属性:

public sealed class DataRowClassMap : ClassMap<DataRow>
{
    public DataRowClassMap()
    {
        Map(m => m.ListingNumber).Ignore();
        Map(m => m.FirstName).Index(0).Name("FirstName");
        Map(m => m.LastName).Index(1).Name("LastName");

        // solution hack
        Func<DataRow, string> func = x => "";
        Map(x => x.HackForCommaAfterLastColumn).Index(3).Name("").ConvertUsing(func);
    }
}

CsvHelper 在最后 value/column 之后添加 `;`

CsvHelper add `;` after last value/column

c#

csvhelper