csvWriter.WriteRecords custom header

using CsvHelper; using System.Collections.Generic; using System.IO; namespace Test { class Program { class CsvColumns { private string column_01; [CsvHelper.Configuration.Attributes.Name("Column 01")] // changes header/column name Column_01 to Column 01 public string Column_01 { get => column_01; set => column_01 = value; } } static void Main(string[] args) { List<CsvColumns> csvOutput = new List<CsvColumns>(); CsvColumns rows = new CsvColumns(); rows.Column_01 = "data1"; csvOutput.Add(rows); string filename = "test.csv"; using (StreamWriter writer = File.CreateText(filename)) { CsvWriter csv = new CsvWriter(writer); csv.WriteRecords(csvOutput); } } } }

void Main()
{
    using (var stream = new MemoryStream())
    using (var writer = new StreamWriter(stream))
    using (var reader = new StreamReader(stream))
    using (var csv = new CsvWriter(writer))
    {
        var records = new List<Person>
        {
            new Test { DisplayName = "one", Age = 1},
            new Test { DisplayName = "two", Age = 2 },
        };
        
        csv.Configuration.RegisterClassMap<PersonMap>();
        csv.WriteRecords(records);
        
        writer.Flush();
        stream.Position = 0;
        
        Console.WriteLine(reader.ReadToEnd());
    }
}

public class Person
{
    public string DisplayName { get; set; }
    public int Age { get; set; }
}

public sealed class PersonMap : ClassMap<Person>
{
    public PersonMap()
    {
        Map(m => m.DisplayName).Name("Display Name");
        Map(m => m.Age);
    }
}

Posted by: Guest on July-02-2021

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