System.InvalidOperationException: Invalid operation. The connection is closed. at System.Data.OracleClient.OracleConnection.GetOpenInternalConnection() at System.Data.OracleClient.OracleConnection.get_ErrorHandle() at System.Data.OracleClient.OracleColumn.GetDecimal(NativeBuffer_RowBuffer buffer) at System.Data.OracleClient.OracleColumn.GetValue(NativeBuffer_RowBuffer buffer) at System.Data.OracleClient.OracleDataReader.GetValues(Object[] values) at System.Data.ProviderBase.DataReaderContainer.CommonLanguageSubsetDataReader.GetValues(Object[] values) at System.Data.ProviderBase.SchemaMapping.LoadDataRow() at System.Data.Common.DataAdapter.FillLoadDataRow(SchemaMapping mapping) at System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue) at System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords) at System.Data.Common.LoadAdapter.FillFromReader(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords) at System.Data.DataTable.Load(IDataReader reader, LoadOption loadOption, FillErrorEventHandler errorHandler) at System.Data.DataTable.Load(IDataReader reader) at news_notice_list.fnCreateBoardList()