public void Reset()
{
_source.Reset();
// If this is a reset, ensure the old writer is Disposed (and flushes output)
if (_writer != null)
{
_writer.Dispose();
_writer = null;
// On Dispose, tell the StreamProvider to publish the table
_streamProvider.Publish(_outputFilePath);
}
}
private static void Append(string inputFileOrFolderPath, string outputFilePath, string inputFileNamePattern = null)
{
string[] inputFilePaths;
if (Directory.Exists(inputFileOrFolderPath))
{
if (String.IsNullOrEmpty(inputFileNamePattern))
{
inputFileNamePattern = "*.*";
}
inputFilePaths = Directory.GetFiles(inputFileOrFolderPath, inputFileNamePattern);
}
else
{
inputFilePaths = new string[] { inputFileOrFolderPath };
}
ITabularWriter writer = null;
string writerColumns = null;
try
{
foreach (string inputFilePath in inputFilePaths)
{
using (ITabularReader reader = TabularFactory.BuildReader(inputFilePath))
{
// Build the writer, if this is the first file
if (writer == null)
{
writer = TabularFactory.AppendWriter(outputFilePath, reader.Columns);
writerColumns = String.Join(", ", reader.Columns);
}
// Validate columns match
string sourceColumns = String.Join(", ", reader.Columns);
if (string.Compare(writerColumns, sourceColumns, true) != 0)
{
throw new InvalidOperationException(string.Format("Can't append to \"{0}\" because the column names don't match.\r\nExpect: {1}\r\nActual: {2}", outputFilePath, writerColumns, sourceColumns));
}
// Copy the rows
CopyRows(reader, writer);
// Write a summary for this input file
Trace.WriteLine($" {inputFilePath}, {reader.RowCountRead:n0} rows; {reader.BytesRead.SizeString()}");
}
}
// Write a summary for the output file
WriteSizeSummary(null, writer);
}
finally
{
if (writer != null)
{
writer.Dispose();
writer = null;
}
}
}
public void Dispose()
{
if (_writer != null)
{
_writer.Dispose();
_writer = null;
}
}