/// <summary>
/// Writes all rows in <paramref name="this"/> to <paramref name="csvWriter"/>.
/// </summary>
/// <remarks>
/// </remarks>
/// <param name="this">
/// The <see cref="DataTable"/>.
/// </param>
/// <param name="csvWriter">
/// The <see cref="CsvWriter"/>.
/// </param>
/// <param name="writeHeaderRecord">
/// If <see langword="true"/>, a header record will also be written, which will be comprised of the column names defined for <paramref name="this"/>.
/// </param>
/// <param name="maximumRows">
/// The maximum number of rows from <paramref name="this"/> that should be written to <paramref name="csvWriter"/>.
/// </param>
/// <param name="objectToStringConverter">
/// Provides a means of converting values in the <see cref="DataRow"/>s to <see cref="String"/>s.
/// </param>
/// <returns>
/// The actual number of rows from <paramref name="this"/> written to <paramref name="csvWriter"/>.
/// </returns>
public static int WriteCsv(this DataTable @this, CsvWriter csvWriter, bool writeHeaderRecord, int? maximumRows, Func<object, string> objectToStringConverter)
{
@this.AssertNotNull("@this");
csvWriter.AssertNotNull("csvWriter");
objectToStringConverter.AssertNotNull("objectToStringConverter");
var num = 0;
if (writeHeaderRecord)
{
var columnNames = new string[@this.Columns.Count];
for (var i = 0; i < columnNames.Length; ++i)
{
columnNames[i] = @this.Columns[i].ColumnName;
}
csvWriter.WriteRecord(columnNames);
}
var maximum = maximumRows.GetValueOrDefault(int.MaxValue);
var buffer = new DataRecord[16];
var bufferOffset = 0;
foreach (DataRow row in @this.Rows)
{
var record = new DataRecord();
for (var i = 0; i < row.ItemArray.Length; ++i)
{
record.Add(objectToStringConverter(row.ItemArray[i]));
}
buffer[bufferOffset++] = record;
if (bufferOffset == buffer.Length)
{
// buffer full
csvWriter.WriteRecords(buffer, 0, buffer.Length);
bufferOffset = 0;
}
if (++num == maximum)
{
break;
}
}
// write any outstanding data in buffer
csvWriter.WriteRecords(buffer, 0, bufferOffset);
return num;
}
