How to read a CSV file into a .NET Datatable

I have been using OleDb provider. However, it has problems if you are reading in rows that have numeric values but you want them treated as text. However, you can get around that issue by creating a schema.ini file. Here is my method I used:

// using System.Data;
// using System.Data.OleDb;
// using System.Globalization;
// using System.IO;

static DataTable GetDataTableFromCsv(string path, bool isFirstRowHeader)
{
    string header = isFirstRowHeader ? "Yes" : "No";

    string pathOnly = Path.GetDirectoryName(path);
    string fileName = Path.GetFileName(path);

    string sql = @"SELECT * FROM [" + fileName + "]";

    using(OleDbConnection connection = new OleDbConnection(
              @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathOnly + 
              ";Extended Properties=\"Text;HDR=" + header + "\""))
    using(OleDbCommand command = new OleDbCommand(sql, connection))
    using(OleDbDataAdapter adapter = new OleDbDataAdapter(command))
    {
        DataTable dataTable = new DataTable();
        dataTable.Locale = CultureInfo.CurrentCulture;
        adapter.Fill(dataTable);
        return dataTable;
    }
}

Here's an excellent class that will copy CSV data into a datatable using the structure of the data to create the DataTable:

A portable and efficient generic parser for flat files

It's easy to configure and easy to use. I urge you to take a look.

I have decided to use Sebastien Lorion's Csv Reader.

Jay Riggs suggestion is a great solution also, but I just didn't need all of the features that that Andrew Rissing's Generic Parser provides.

UPDATE 10/25/2010

After using Sebastien Lorion's Csv Reader in my project for nearly a year and a half, I have found that it throws exceptions when parsing some csv files that I believe to be well formed.

So, I did switch to Andrew Rissing's Generic Parser and it seems to be doing much better.

UPDATE 9/22/2014

These days, I mostly use this extension method to read delimited text:

https://github.com/Core-Techs/Common/blob/master/CoreTechs.Common/Text/DelimitedTextExtensions.cs#L22

https://www.nuget.org/packages/CoreTechs.Common/

UPDATE 2/20/2015

Example:

var csv = @"Name, Age
Ronnie, 30
Mark, 40
Ace, 50";

TextReader reader = new StringReader(csv);
var table = new DataTable();
using(var it = reader.ReadCsvWithHeader().GetEnumerator())
{

    if (!it.MoveNext()) return;

    foreach (var k in it.Current.Keys)
        table.Columns.Add(k);

    do
    {
        var row = table.NewRow();
        foreach (var k in it.Current.Keys)
            row[k] = it.Current[k];
    
        table.Rows.Add(row);
    
    } while (it.MoveNext());
}

Hey its working 100%

  public static DataTable ConvertCSVtoDataTable(string strFilePath)
  {
    DataTable dt = new DataTable();
    using (StreamReader sr = new StreamReader(strFilePath))
    {
        string[] headers = sr.ReadLine().Split(',');
        foreach (string header in headers)
        {
            dt.Columns.Add(header);
        }
        while (!sr.EndOfStream)
        {
            string[] rows = sr.ReadLine().Split(',');
            DataRow dr = dt.NewRow();
            for (int i = 0; i < headers.Length; i++)
            {
                dr[i] = rows[i];
            }
            dt.Rows.Add(dr);
        }

    }


    return dt;
   }

CSV Image

Data table Imported