csvHelper 排序动态数据

Question

任何人都可以帮助我了解我们如何在写入字符串对象之前对 csvHelper 中的数据进行排序吗？我正在尝试使用 Key，但在有动态数据的情况下它不起作用。

        string source = "James,Anthony,Mary\n,10,\n21,,212";



        using var reader = new StringReader(source);
        using var csvReader = new CsvReader(reader, CultureInfo.InvariantCulture);
        var records =  csvReader.GetRecords<dynamic>().ToList();


        var orderedRecords = records.OrderBy(r => r.Key);

        using (var writer = new StringWriter())
        using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
        {
            csv.WriteRecords(orderedRecords);

            Console.WriteLine( writer.ToString());
        }

我遇到以下异常。

CsvHelper.WriterException: 'An unexpected error occurred.
  IWriter state:
  Row: 1
  Index: 0
  HeaderRecord:
  1
  '

我正在寻找的预期输出是，

   Anthony,James,Mary //--> Header Sorted Alphabetically
   ,10,               //--> First Row Sorted as per Header
   21,,212            //--> Second Row Sorted As Per Header

非常感谢你在这方面的帮助。

Answer 1

更新问题后。您需要使用 James、Antony 或 Mary 而不是 'Key' 来对数据进行排序并且代码有效：

var source = $"James,Anthony,Mary\n,10,\n21,,212";

using var reader = new StringReader(source);
using var csvReader = new CsvReader(reader, CultureInfo.InvariantCulture);
var records = csvReader.GetRecords<dynamic>().ToList();

var orderedRecords = records.OrderBy(r => r.James);

using (var writer = new StringWriter())
using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
{
    csv.WriteRecords(orderedRecords);

    Console.WriteLine(writer.ToString());
}

P.S。使用dynamic读取数据是非常危险的，一般我们使用stable data table.

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