... SqlDataAdapterSqlDataAdapter, , OleDbDataAdapterOleDbDataAdapter, , SqlDataReaderSqlDataReader, , OleDbDataReaderOleDbDataReader, , SqlParameterSqlParameter, , OleDbParameterOleDbParameter, ... System.Data.SqlTypesSystem.Data.SqlTypes..––CCááccllớớppcơcơbbảảnntrongtrongSystem.DataSystem.Data: : DataSetDataSet, , DataTableDataTable, , DataRowDataRow, , DataColumnDataColumn, , DataRelationDataRelation, Constraint, Constraint––CCááccllớớppđđặặccbibiệệtt: ... SqlCommand(selectSqlCommand(select, , connconn););SqlDataAdapterSqlDataAdapteradapter = new adapter = new SqlDataAdapterSqlDataAdapter();();adapter.SelectCommandadapter.SelectCommand= = cmdcmd;;DataSetDataSetdata...