Dealing with commas in a CSV file

Question

I am looking for suggestions on how to handle a csv file that is being created, then uploaded by our customers, and that may have a comma in a value, like a company name.

Answer 1

If you feel like reinventing the wheel, the following may work for you:

public static IEnumerable SplitCSV(string line)
{
    var s = new StringBuilder();
    bool escaped = false, inQuotes = false;
    foreach (char c in line)
    {
        if (c == ',' && !inQuotes)
        {
            yield return s.ToString();
            s.Clear();
        }
        else if (c == '\\' && !escaped)
        {
            escaped = true;
        }
        else if (c == '"' && !escaped)
        {
            inQuotes = !inQuotes;
        }
        else
        {
            escaped = false;
            s.Append(c);
        }
    }
    yield return s.ToString();
}