/// <summary>
/// 以事务的方式执行相应的命令，返回结果集中的第一行第一列的值，如果不成功则返回null值
/// </summary>
/// <param name="cmd">需要执行的DbCommand命令对象</param>
/// <param name="trans">数据库事务对象</param>
/// <returns>返回结果集中的第一行第一列的值，如果不成功则返回null值</returns>
public object ExecuteScalar(DbCommand cmd, Trans trans)
{
if (cmd != null)
{
cmd.Connection.Close();
cmd.Connection = trans.Connection;
cmd.Transaction = trans.Transaction;
object retVal = cmd.ExecuteScalar();
return retVal;
}
return null;
}
/// <summary>
/// 以事务的方式执行相应的命令，返回一个DbDataReader数据对象，如果没有则返回null值
/// </summary>
/// <param name="cmd">需要执行DbCommand命令对象</param>
/// <param name="trans">数据库事务对象</param>
/// <returns>返回一个DbDataReader数据对象，如果没有则返回null值</returns>
public DbDataReader ExecuteReader(DbCommand cmd, Trans trans)
{
if (cmd != null)
{
cmd.Connection.Close();
cmd.Connection = trans.Connection;
cmd.Transaction = trans.Transaction;
DbDataReader reader = cmd.ExecuteReader();
return reader;
}
return null;
}
/// <summary>
/// 以事务的方式执行相应的命令，返回一个DataTable数据集合
/// </summary>
/// <param name="cmd"> 需要执行的DbCommand命令对象</param>
/// <param name="trans">数据库事务对象</param>
/// <returns>返回一个DataTable数据集合</returns>
public DataTable ExecuteDataTable(DbCommand cmd, Trans trans)
{
DataTable dataTable = new DataTable();
if (cmd != null)
{
cmd.Connection = trans.Connection;
cmd.Transaction = trans.Transaction;
DbDataAdapter dbDataAdapter = this._dbFactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
dbDataAdapter.Fill(dataTable);
}
return dataTable;
}
/// <summary>
/// 以事务的方式执行相应的命令，返回影响的数据记录数，如果不成功则返回-1
/// </summary>
/// <param name="cmd">需要执行的DbCommand命令对象</param>
/// <param name="trans">数据库事务对象</param>
/// <returns>返回影响的数据记录数，如果不成功则返回-1</returns>
public int ExecuteNonQuery(DbCommand cmd, Trans trans)
{
if (cmd != null)
{
cmd.Connection.Close();
cmd.Connection = trans.Connection;
cmd.Transaction = trans.Transaction;
int retVal = cmd.ExecuteNonQuery();
return retVal;
}
return -1;
}
/// <summary>
/// 已事务的方式执行相应的命令，返回一个DataSet数据集合
/// </summary>
/// <param name="cmd"></param>
/// <param name="trans"></param>
/// <returns></returns>
public DataSet ExecuteDataSet(DbCommand cmd, Trans trans)
{
DataSet ds = new DataSet();
if(cmd != null)
{
cmd.Connection = trans.Connection;
cmd.Transaction = trans.Transaction;
DbDataAdapter dbDataAdapter = this._dbFactory.CreateDataAdapter();
dbDataAdapter.SelectCommand = cmd;
dbDataAdapter.Fill(ds);
}
return ds;
}
