Writing data into CSV file in C#

Question

I am trying to write into a csv file row by row using C# language. Here is my function

string first = reader[0].ToString();
string second=image.         


        

Answer 1

Instead of reinventing the wheel a library could be used. CsvHelper is great for creating and reading csv files. It's read and write operations are stream based and therefore also support operations with a big amount of data.

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You can write your csv like the following.

using(var textWriter = new StreamWriter(@"C:\mypath\myfile.csv"))
{
    var writer = new CsvWriter(textWriter, CultureInfo.InvariantCulture);
    writer.Configuration.Delimiter = ",";

    foreach (var item in list)
    {
        writer.WriteField( "a" );
        writer.WriteField( 2 );
        writer.WriteField( true );
        writer.NextRecord();
    }
}

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As the library is using reflection it will take any type and parse it directly.

public class CsvRow
{
    public string Column1 { get; set; }
    public bool Column2 { get; set; }

    public CsvRow(string column1, bool column2)
    {
        Column1 = column1;
        Column2 = column2;
    }
}

IEnumerable rows = new [] {
    new CsvRow("value1", true),
    new CsvRow("value2", false)
};
using(var textWriter = new StreamWriter(@"C:\mypath\myfile.csv")
{
    var writer = new CsvWriter(textWriter, CultureInfo.InvariantCulture);
    writer.Configuration.Delimiter = ",";
    writer.WriteRecords(rows);
}

value1,true

value2,false

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If you want to read more about the librarys configurations and possibilities you can do so here.