/// <summary>
/// Reads out the next row out of the current CSV stream and calls for every detected
/// field value the given action.
/// </summary>
/// <param name="valueAction">Action with one string parameter.</param>
/// <returns>A task that represents the asynchronous operation. The value of the TResult
/// parameter contains the number of parsed values.</returns>
/// <returns>
public async Task <int> ReadLineAsync(Action <int, string> valueAction)
{
if (valueAction == null)
{
throw new ArgumentNullException(nameof(valueAction));
}
var valueCount = 0;
do
{
if (await _csvParser.NextTokenAsync(() => NextCharAsync()))
{
valueAction(valueCount, _csvParser.Token.ToString());
valueCount++;
}
}while (_csvParser.State != CsvParser.TokenizerState.IsEndOfLine);
_lineCount++;
return(valueCount);
}
