Wednesday, December 17, 2014

C# CSV to Datatable

Add reference of  Microsoft.VisualBasic which would enable TextFieldParser class

using Microsoft.VisualBasic.FileIO;

public static DataTable GetDataTabletFromCsvFile(string csvFilePath)
{
    DataTable csvData = new DataTable();
    using (TextFieldParser csvReader = new TextFieldParser(csvFilePath,Encoding.UTF7))
    {
        csvReader.SetDelimiters(new string[] { "," });
        csvReader.HasFieldsEnclosedInQuotes = true;
        //read column names
        string[] colFields = csvReader.ReadFields();
        foreach (string column in colFields)
        {
            DataColumn datecolumn = new DataColumn(column);
            datecolumn.AllowDBNull = true;
            csvData.Columns.Add(datecolumn);
        }
        while (!csvReader.EndOfData)
        {
            string[] fieldData = csvReader.ReadFields();
            //Making empty value as null
            for (int i = 0; i < fieldData.Length; i++)
            {
                if (fieldData[i] == "")
                {
                    fieldData[i] = null;
                }
            }
            csvData.Rows.Add(fieldData);
        }
    }
    return csvData;
}

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