我在我的C#設備應用程序中有過程。這是它的外觀:SET TRANSACTION錯誤,C#,Oracle
private void stk_crane_start_movement()
{
conn.Open();
OracleCommand cmd = new OracleCommand();
OracleTransaction trans;
trans = conn.BeginTransaction();
cmd.Transaction = trans;
cmd.Connection = conn;
conn.AutoCommit = false;
cmd.CommandTimeout = 0;
cmd.CommandText = "dc.stk_crane_start_movement";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("pn_crane_opr_id_no", OracleDbType.Number).Value = empid.ToString();
cmd.Parameters.Add("pn_crane_movement_id_no", OracleDbType.Number).Value = pn_crane_movement_id_no.ToString();
cmd.Parameters.Add(new OracleParameter("pv_error", OracleDbType.VarChar));
cmd.Parameters["pv_error"].Direction = ParameterDirection.Output;
string pv_error;
cmd.ExecuteNonQuery();
pv_error = cmd.Parameters["pv_error"].Value.ToString();
if (pv_error.ToString() == "")
{
trans.Commit();
trans.Dispose();
conn.Close();
cmd.Dispose();
}
else
{
trans.Rollback();
MessageBox.Show("" + pv_error, "Error");
}
}
我越來越ORA-01453: SET TRANSACTION must be first statement of transaction
在trans = conn.BeginTransaction();
可有人請向我解釋什麼,我做錯了?
我也嘗試過這樣的:
private void stk_crane_start_movement()
{
conn.Open();
OracleCommand cmd = conn.CreateCommand();
OracleTransaction trans;
trans = conn.BeginTransaction(IsolationLevel.ReadCommitted);
cmd.Transaction = trans;
try
{
cmd.CommandText = "dc.stk_crane_start_movement";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("pn_crane_opr_id_no", OracleDbType.Number).Value = empid.ToString();
cmd.Parameters.Add("pn_crane_movement_id_no", OracleDbType.Number).Value = pn_crane_movement_id_no.ToString();
cmd.Parameters.Add(new OracleParameter("pv_error", OracleDbType.VarChar));
cmd.Parameters["pv_error"].Direction = ParameterDirection.Output;
cmd.ExecuteNonQuery();
trans.Commit();
}
catch
{
pv_error = cmd.Parameters["pv_error"].Value.ToString();
MessageBox.Show("" + pv_error, "Error");
try
{
trans.Rollback();
}
catch (OracleException ex)
{
MessageBox.Show("Rollback failed" + ex, "Exception Error");
}
}
}
但因爲它不是我期待它不通過嘗試catch語句去一個異常錯誤。 我希望它在我的pv_error變量被填充時回滾。這就是爲什麼我在第一個例子中包含if語句的原因。
此外,我不這樣一個前有任何其他交易..
如果你把conn.AutoCommit = false;在開始交易之前? – Sebas 2013-04-11 12:51:37
嘗試切換爲使用[TransactionScope](http://msdn.microsoft.com/en-us/library/system.transactions.transactionscope.aspx)。像[this](http://stackoverflow.com/questions/15268430/how-to-implement-transaction/15268649#15268649) – 2013-04-11 12:53:05
不,仍然是同樣的錯誤。 tx tho – 2013-04-12 12:48:19