c# - 将数据写入 CSV 时如何排除 header

Question

我正在将我的数据从 public class 写入 CSV 文件。因为我想附加我的数据，所以我想排除标题的导入，只从类中导入数据。我下面的代码导入了标题和数据。希望得到帮助。谢谢。

Record.cs - 我的类(class)

public class Record
{
    public string Name
    {
        get; set;
    }

    public DateTime DateOfBirth
    {
        get; set;
    }
}

Form1.cs - 我的表单

public partial class Form1 : Form
{
    private List<Record> records;

    public Form1()
    {
        InitializeComponent();
        records = new List<Record>();
    }

    private void Savetocsv_Click(object sender, EventArgs e)
    {
        var myDocument = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
        using (var writer = new StreamWriter(myDocument + "/my-data.csv", append: true))
        {
            using (var csv = new CsvWriter(writer))
            {
                csv.WriteRecords(records);
            }                
        }
    }

Answer 1

使用 Configuration ，您可以使用属性 HasHeaderRecord:

HasHeaderRecord : Gets or sets a value indicating if the CSV file has a header record.
Default is true.

var records = new List<Foo>
{
    new Foo { Id = 1, Name = "one" },
    new Foo { Id = 1, Name = "one" },
};

using (var writer = new StreamWriter($"file.csv"))
using (var csv = new CsvWriter(writer, new Configuration { HasHeaderRecord = false }))
{
    csv.WriteRecords(records);
}

结果文件:“file.csv”

1;one
1;one

或者简单地循环记录并写入它们:

var records = new List<Foo>
{
    new Foo { Id = 1, Name = "one" },
    new Foo { Id = 1, Name = "one" }
};

using (var writer = new StreamWriter($"file.csv"))
using (var csv = new CsvWriter(writer))
{
    foreach (var record in records)
    {
        csv.WriteRecord(record);
        csv.NextRecord();
    }
}