public sealed class OleDbCommand : DbCommand, ICloneable, IDbCommand, IDisposable
OleDbCommand() OleDbCommand(String)//String 是sql語句 OleDbCommand(String, OleDbConnection) OleDbCommand(String, OleDbConnection, OleDbTransaction)
public sealed class OleDbConnection : DbConnection, ICloneable, IDbConnection, IDisposable
OleDbConnection()
OleDbConnection(String)