[英]Calling an Oracle Stored Procedure in C#
我試圖從C#程序調用Oracle存儲過程。 我正在使用SYS_REFCURSOR
和存儲過程的輸出。 到達該行時,我收到無效的SQL錯誤
OracleDataReader reader = cmd.ExecuteReader()
在我的C#程序中。 我不知道為什么我得到這個無效的SQL錯誤。
這是C#代碼:
private void button1_Click(object sender, EventArgs e)
{
string custname;
int custnbr;
List<Customer> customers = new List<Customer>();
string oradb = "User Id=XXXXX;Password=XXXXX;Data Source=IP:PORT/xxxx;Pooling=false;";
OracleConnection conn = new OracleConnection(oradb);
try
{
conn.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "PROCEDURE_TEST";
OracleParameter oraP = new OracleParameter();
oraP.ParameterName = "R_RECORDSET";
oraP.OracleDbType = OracleDbType.RefCursor;
oraP.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(oraP);
cmd.CommandType = CommandType.Text;
OracleDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
custnbr = reader.GetInt32(0);
custname = reader.GetString(1);
Customer custTemp = new Customer(custnbr, custname);
customers.Add(custTemp);
}
foreach (var cust in customers)
{
textBox1.AppendText("Customer Number: " + cust.custnbr + "\t");
textBox1.AppendText("Customer Name: " + cust.custname + "\r\n");
}
}
catch(Exception ex)
{
textBox1.AppendText(ex.ToString());
conn.Close();
}
}
這是Oracle存儲過程:
create or replace PROCEDURE PROCEDURE_TEST
( R_RECORDSET OUT SYS_REFCURSOR) AS
BEGIN
OPEN R_RECORDSET FOR
SELECT POTCHARGECATEGORY, POTCHARGECODE, POTCHARGEDESCRIPTION,
POTCHARGEBASEAMT, SUM(POTCHARGEQTY), SUM(POTCHARGEAMOUNT)
FROM riowner.ccum_customer customer
WHERE ic.collection_Datetime =
TO_DATE('30-SEP-2015 23:59:59','DD-MON-YYYY HH24:MI:SS')
GROUP BY POTCHARGECATEGORY, POTCHARGECODE, POTCHARGEDESCRIPTION,
POTCHARGEBASEAMT;
END PROCEDURE_TEST;
cmd.CommandType = CommandType.Text;
應該
cmd.CommandType = CommandType.StoredProcedure;
作為MethodMan答案的替代方法,您應該能夠將命令類型保留為Text,但是將SQL命令更改為:
cmd.CommandText = "BEGIN PROCEDURE_TEST END;";
如果您只需要調用一個過程,則MethodMan的方法會更好,但是上面我做的方法將允許您執行更多的過程,因此將來需要注意這一點。
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