public BulkCopy(string connStr, BulkCopySupportDB DbType) { switch (DbType) { case BulkCopySupportDB.MSSQL: bulkCopyWrapper = new SqlBulkCopyWrapper(new SqlConnection(connStr)); break; case BulkCopySupportDB.Oracle: bulkCopyWrapper = new OracleBulkCopyWrapper(new OracleConnection(connStr)); break; default: throw new Exception("Not Support DbType"); } }