我得到這個錯誤消息:不支持的Oracle參數
System.ArgumentException了未處理 不支持消息=型Devart.Data.Oracle.OracleParameter值。
...與此代碼:
OracleParameter pRes = new OracleParameter("C_REF", OracleDbType.Cursor);
pRes.Direction = ParameterDirection.ReturnValue;
oracleCommand1.Parameters.Clear();
int iFromYear = dateTimePickerFrom.Value.Year;
int iFromMonth = dateTimePickerFrom.Value.Month;
int iFromDay = dateTimePickerFrom.Value.Day;
int iToYear = dateTimePickerTo.Value.Year;
int iToMonth = dateTimePickerTo.Value.Month;
int iToDay = dateTimePickerTo.Value.Day;
oracleCommand1.Parameters.Add("iStartDate", new DateTime(iFromYear, iFromMonth, iFromDay));
oracleCommand1.Parameters.Add("iEndDate", new DateTime(iToYear, iToMonth, iToDay));
oracleCommand1.Parameters.Add("iCATEGORYID", 114);
oracleCommand1.Parameters.Add("c_ref", pRes);
oracleConnection1.Open();
oracleCommand1.ExecuteCursor();
更新響應評論:
那麼什麼可以替代的OracleParameter的用於傳遞?
當我將其更改爲這個(我只是揮舞周圍像一個忙碌的雞):
oracleConnection1.Open();
OracleDataReader myReader = oracleCommand1.ExecuteReader();
OracleParameter pRes = new OracleParameter("C_REF", myReader);
pRes.Direction = ParameterDirection.InputOutput; // <-- devArt's code
oracleCommand1.Parameters.Clear();
int iFromYear = dateTimePickerFrom.Value.Year;
int iFromMonth = dateTimePickerFrom.Value.Month;
int iFromDay = dateTimePickerFrom.Value.Day;
int iToYear = dateTimePickerTo.Value.Year;
int iToMonth = dateTimePickerTo.Value.Month;
int iToDay = dateTimePickerTo.Value.Day;
oracleCommand1.Parameters.Add("iStartDate", new DateTime(iFromYear, iFromMonth, iFromDay));
oracleCommand1.Parameters.Add("iEndDate", new DateTime(iToYear, iToMonth, iToDay));
oracleCommand1.Parameters.Add("iCATEGORYID", 114);
oracleCommand1.Parameters.Add("c_ref", pRes);
while (myReader.Read())
{
;// Console.WriteLine(myReader.GetInt32(0) + ", " + myReader.GetString(myReader.GetOrdinal("DName")));
}
// always call Close when done reading.
myReader.Close();
...我得到也不犯錯封郵件,但我也拿不出數據。
更新到最新版本:
好的,我終於搞定了。這些可能不是優雅,但它確實retreive數據:
oracleCommand1.Parameters.Clear();
int iFromYear = dateTimePickerFrom.Value.Year;
int iFromMonth = dateTimePickerFrom.Value.Month;
int iFromDay = dateTimePickerFrom.Value.Day;
int iToYear = dateTimePickerTo.Value.Year;
int iToMonth = dateTimePickerTo.Value.Month;
int iToDay = dateTimePickerTo.Value.Day;
oracleCommand1.Parameters.Add("iStartDate", new DateTime(iFromYear, iFromMonth, iFromDay));
oracleCommand1.Parameters.Add("iEndDate", new DateTime(iToYear, iToMonth, iToDay));
oracleCommand1.Parameters.Add("iCATEGORYID", 114);
oracleConnection1.Open();
OracleDataReader myReader = oracleCommand1.ExecuteReader();
OracleParameter pRes = new OracleParameter("C_REF", myReader);
pRes.Direction = ParameterDirection.InputOutput;
oracleCommand1.Parameters.Add("c_ref", pRes);
while (myReader.Read())
{
MessageBox.Show(myReader.GetString(0)); // + ", " + myReader.GetString(myReader.GetOrdinal("contactemail")));
}
myReader.Close();
現在,雖然我如何可以檢索的所有數據,而不是僅僅從一個列,如我上面做什麼?最好的情況是直接將結果集導入DataGridView,但如果必須我可以concat(stringFormat())我想要的各個列並以編程方式將它們添加到備忘錄或某些類似...
沒錯! +1 – 2012-03-15 18:00:51
這很有趣; devArt的貓(dotConnect組件貓)不知道或注意到... – 2012-03-15 20:23:18
好的,我在上面添加了以下信息。 – 2012-03-15 20:37:08