/// <summary>
/// 执行数据库事务查询操作,返回结果集中位于第一行第一列的Object类型的值
/// </summary>
/// <param name="transaction">一个已存在的数据库事务对象</param>
/// <param name="commandType">命令类型</param>
/// <param name="commandText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="commandParameters">命令参数集合</param>
/// <returns>当前事务查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>
public object ExecuteScalar(OracleTransaction transaction, CommandType commandType, string commandText, params OracleParameter[] commandParameters)
{
if (transaction == null) throw new ArgumentNullException("当前数据库事务不存在");
OracleConnection connection = transaction.Connection;
if (_connection == null) throw new ArgumentException("当前事务所在的数据库连接不存在");
OracleCommand command = new OracleCommand();
object result = null;
try
{
PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters);
result = command.ExecuteScalar();
command.Parameters.Clear();
}
catch
{
throw;
}
finally
{
transaction.Dispose();
command.Dispose();
}
return result;
}
/// <summary>
/// 执行数据库事务查询操作,返回受影响的行数
/// </summary>
/// <param name="transaction">数据库事务对象</param>
/// <param name="cmdType">Command类型</param>
/// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
/// <param name="commandParameters">命令参数集合</param>
/// <returns>当前事务查询操作影响的数据行数</returns>
public int ExecuteNonQuery(OracleTransaction transaction, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
{
OracleCommand command = new OracleCommand();
OracleConnection connection = transaction.Connection;
int result = 0;
try
{
PrepareCommand(command, connection, transaction, cmdType, cmdText, commandParameters);
result = command.ExecuteNonQuery();
command.Parameters.Clear();
}
catch
{
throw;
}
finally
{
transaction.Dispose();
command.Dispose();
}
return result;
}