Creating a DataTable from CSV File

Question

I\'m working on a project and I need to read a CSV file and then fill a DataSet with its data. I\'ve been searching and I have found some interesting things in OleDB.

Answer 1

if nothing special i use this kind of code

TextReader tr1 = new StreamReader(@"c:\pathtofile\filename",true);

var Data = tr1.ReadToEnd().Split('\n')
.Where(l=>l.Length>0)  //nonempty strings
.Skip(1)               // skip header 
.Select(s=>s.Trim())   // delete whitespace
.Select(l=>l.Split(',')) // get arrays of values
.Select(l=>new {Field1=l[0],Field2=l[1],Field3=l[2]});

Answer 2

I always use this CSV library for reading CSV files in through C# its always worked good for me.

http://www.codeproject.com/KB/database/CsvReader.aspx

Heres an example of reading a CSF file using the library

using System.IO;
using LumenWorks.Framework.IO.Csv;

void ReadCsv()
{
    // open the file "data.csv" which is a CSV file with headers
    using (CsvReader csv =
           new CsvReader(new StreamReader("data.csv"), true))
    {
        int fieldCount = csv.FieldCount;
        string[] headers = csv.GetFieldHeaders();

        while (csv.ReadNextRecord())
        {
            for (int i = 0; i < fieldCount; i++)
                Console.Write(string.Format("{0} = {1};",
                              headers[i], csv[i]));

            Console.WriteLine();
        }
    }
}

Answer 3

Try including IMEX in the extended properties, which will tell the driver that you have mixed mode data

Text;HDR=YES;FMT=Delimited;IMEX=1

Answer 4

The best option I have found, and it resolves issues where you may have different versions of Office installed, and also 32/64-bit issues, is FileHelpers.

It can be added to your project references using NuGet and it provides a one-liner solution:

CommonEngine.CsvToDataTable(path, "ImportRecord", ',', true);

Answer 5

KBCsv has built-in support for reading into a DataSet:

using (var reader = new CsvReader(@"C:\data.csv")) {
    reader.ReadHeaderRecord();
    var dataSet = new DataSet();
    reader.Fill(dataSet, "csv-data");
}