public void Start()
{
if (didStart)
{
throw new Exception("DbBulkCopierX can be started only once.");
}
feedableDataReader = new FeedableDataReader();
foreach (string nextColumn in ColumnNames)
{
feedableDataReader.Columns.Add(nextColumn);
}
Log(string.Format("Opening connection <{0}>", ConnectionString));
bulkCopy = BulkCopy.GetBulkCopy(ConnectionType, ConnectionString);
Log("Opened connection.");
bulkCopy.DestinationTableName = TableName;
foreach (string nextColumn in ColumnNames)
{
bulkCopy.AddColumnMapping(nextColumn, nextColumn);
}
Log("Setting timeout value to " + Timeout + ".");
bulkCopy.Timeout = Timeout;
Log("Setting batch value to " + BatchSize + ".");
bulkCopy.BatchSize = BatchSize;
bulkCopyTask = Task.Factory.StartNew(() =>
{
try
{
bulkCopy.WriteToServer(feedableDataReader);
}
catch (Exception exc)
{
Log("Exception occurred: " + exc.Message);
bulkCopyException = exc;
// Unblock possible thread that is running AcceptRow().
feedableDataReader.UnblockRowAccept();
// Unblock future call to TellNoMoreRows().
feedableDataReader.UnblockRowAccept();
bulkCopy.Dispose();
bulkCopy = null;
throw;
}
});
didStart = true;
}
public void Dispose()
{
if (feedableDataReader != null)
{
Log("Waiting for bulk copy task to end...");
feedableDataReader.TellNoMoreRows();
if (bulkCopyTask != null)
{
bulkCopyTask.Wait();
bulkCopyTask = null;
}
if (bulkCopy != null)
{
bulkCopy.Dispose();
bulkCopy = null;
}
Log("Closing reader and connection...");
feedableDataReader.Close();
feedableDataReader = null;
Log("Closed reader and connection.");
}
}
