/// <summary>
/// If needed, and not in append mode - add skipped lines,
/// and headings
/// </summary>
/// <param name="preambleLines">Pre-amble lines to add</param>
public void WritePreamble(string[] preambleLines = null)
{
InitialiseWrite();
if (AppendMode)
{
_writeInitialised = true;
return;
}
if (Delimiter == null)
{
throw new ArgumentNullException("Delimiter");
}
if (preambleLines != null)
{
foreach (string line in preambleLines)
{
_writeStream.WriteLine(line);
}
}
if (FirstRowHeader)
{
var headerRow = RelevantMetaData.Select((a, i) => a.ColumnHeader ?? string.Concat("Column " + i))
.Aggregate((a, b) => string.Concat(a, Delimiter, b));
_writeStream.WriteLine(headerRow);
}
_writeInitialised = true;
}
/// <summary>
/// Write lines for the specified records to the output stream
/// </summary>
/// <param name="records">Records of the target type to serialize to text</param>
public void WriteLines(IEnumerable <T> records)
{
if (Delimiter == null)
{
throw new ArgumentNullException("Delimiter");
}
if (_writeInitialised == false)
{
WritePreamble(PreambleLines);
}
foreach (T record in records)
{
var writeData = string.Join(Delimiter, RelevantMetaData.Select(a => a.GetValue(record)));
_writeStream.WriteLine(writeData);
}
}
