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How can I get multiple output parameters from a stored procedure in a web service in C#?

I have a web service in C#, I use it to consults from tables, but I want to create a WebMethod to call a stored procedure and get back multiples output parameters. I can execute it with output parameters, it doesn't work when I try to call it whit outputs parameters.
This is a sample, I want to get back more that 2 parameters.
Stored procedure:
CREATE OR REPLACE PROCEDURE O_CAPEREZ.GIO_SP (
VNOMBRE IN VARCHAR2,
SALUDO OUT VARCHAR2 )
AS
BEGIN
INSERT INTO G_PRUEBA_SP(NOMBRE)
VALUES (vNOMBRE);
SALUDO:= ('Hello: ' || vNOMBRE);
END;
And this is my code in the web service, when I execute it using output variables I get this error
[HYC00] [Oracle][ODBC]Optional feature not implemented
C# code:
[WebMethod]
public string AP_Data(string curp)
{
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (OdbcConnection con = new OdbcConnection(constr))
{
OdbcCommand cmd = new OdbcCommand("{CALL GIO_SP(?,?)}", con);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#vNOMBRE", (curp));
cmd.Parameters.Add("#vNOMBRE", OdbcType.VarChar, 18);
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Parameters["#SALUDO"].Direction = ParameterDirection.ReturnValue;
cmd.Connection.Close();
string ret = Convert.ToString(cmd.Parameters["#SALUDO"].Value);
return ret;
}
}

You have to add the parameter to the list even if you're not going to set a value there:
cmd.Parameters.Add("#SALUDO", OdbcType.VarChar, 18).Direction = ParameterDirection.Output;
I don't know the the Oracle flavor is different, but in SQL I use ParameterDirection.ReturnValue rather than ParameterDirection.Output.

here's how i do it in MS SQL server 2008 But notice the data type and the lenth of the variables your create must be the same in your table
the stored proc create code
USE DATABASE DATABASE_NAME
GO
CREATE PROC SP_METHOD
#ID_CATIGORY INT,
#NAME VARCHAR (50),
#DESCRIPTION VARCHAR (50)
AS
INSERT INTO TABLE_NAME
([ID_CAT]
,[NAME_PRODUCT]
,[DESC_PRODUCT]
)
VALUES
( #ID_CATIGORY
,#NAME
,#DESCRIPTION )
GO
in the c# code
// Create SqlConnection
SqlConnection conn= new SqlConnection(#"Server=server_name;
DataBase=your_data_base_name;Integrated Security=false;User
Id=user_id;Password=password");
// Open the Connection
if (sqlconnection.State != ConnectionState.Open)
{
conn= .Open();
}
// execute stored_procedure method don't change this
public void ExecuteCommand(string stored_procedure, SqlParameter[] param)
{
SqlCommand sqlcomd = new SqlCommand();
sqlcomd.CommandType = CommandType.StoredProcedure;
sqlcomd.CommandText = stored_procedure;
sqlcomd.Connection = sqlconnection;
if (param !=null)
{
sqlcomd.Parameters.AddRange(param);
}
sqlcomd.ExecuteNonQuery();
}
// close connection method
public void close_conn()
{
if (sqlconnection.State == ConnectionState.Open)
{
sqlconnection.Close();
}
}
// execute and retrieving data Method
public void Add_product(int ID_cat ,string Name_Product,string
Des_Product)
{
SqlParameter[] param = new SqlParameter[3];
param[0] = new SqlParameter("#ID_CAT", SqlDbType.Int);
param[0].Value = ID_cat;
param[1] = new SqlParameter("#NAME_PRODUCT", SqlDbType.VarChar, 50);
param[1].Value = Name_Product;
param[2] = new SqlParameter("#DESC_PRODUCT", SqlDbType.VarChar, 50);
param[2].Value = Des_Product;
ExecuteCommand("StoredProcedure_name", param);
close_conn();
}
and finally you can call this function
Add_product(Convert.ToInt32(ComboBox.SelectedValue),txt_name.Text,
txt_desc.Text);
if there is any part you don't understand lemme know

I've seen many ways to accomplish this.
One way is to Pipe Delimit your select statement in your stored procedure and then use "Value1|Value2".Split('|')[0] to get Value1.
You could also return a table instead of using multiple parameters
DataTable table = new DataTable();
DataAdapter adapter = new DataAdapter(cmd);
adapter.fill(table);
return table.Rows[0]["Greeting"] + table.Rows[0]["Name"];
In the second example you can return as many 'Parameters' as you want, but you will have to assign them to their rightful spots later in your code.
I've also seen an XML way to do this same feature but I won't provide the code here since I don't personally think it is a very good way to do it. The way I've seen done was adding a bunch of XML attributes to a parent tag, and then coming back later and finding the value of each tag later in the code.
In MYSQL it would go like this
CREATE PROCEDURE O_CAPEREZ.GIO_SP (
#vNOMBRE VARCHAR(50))
AS
BEGIN
INSERT INTO G_PRUEBA_SP(NOMBRE)
VALUES (#vNOMBRE);
select 'Hola' as Greeting, #vNOMBRE as Name
END
Also note what Marc_s commented
You need to set the .Direction of the parameter BEFORE making the call to .ExecuteNonQuery()

C# ADO.NET - Could Not Find Stored Procedure

I am trying to execute a stored procedure through C#, ADO.NET and below is the code I am trying to execute:
using (SqlConnection conn = new SqlConnection(".;Initial Catalog=MyDB;User ID=sa;Password=***"))
{
try
{
string cmdText = "dbo.sp_Create_FlaggedItemEntry #URI, #ID";
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
conn.Open();
cmd.CommandText = cmdText;
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#URI", value1);
cmd.Parameters.AddWithValue("#ID", value2);
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn != null)
{
conn.Close();
}
}
}
Now when I try to debug it, I got an error at the line - cmd.ExecuteNonQuery(); - "Could Not Find Stored Procedure dbo.sp_Create_FlaggedItemEntry"
I verified that the Connection String is all correct and Stored Procedure exists.
Further, If I change the line - cmd.CommandType = CommandType.StoredProcedure; to cmd.CommandType = CommandType.Text; it get executed successfully and as expected.
Can someone suggest what I am missing and doing wrong here - Please pardon me if it is something very basic as it is quite long since I last worked with ADO.NET

CommandType.StoredProcedure means that the CommandText should only contain the name of the stored procedure.
Remove the parameter names from the string.

Take the parameters out of the command text. Also, you don't need to specify dbo.
The reason it's working with CommandType.Text is because it's a legitimate SQL command like that - if you were to open up SSMS and type that in it'd work as long as you also create the variables #URI and #ID
Documentation here

You should mention Data Source / Server in connectionString. Also for CommandText #Slaks is correct.

PLS-00201: identifier 'schema.cursorname' must be declared

I know there are a couple of other questions on here with the exact same issue, but I am 100% positive I don't have any type of permissions issue. The procedure executes fine from the query editor, but for some reason I can't get this proc to execute from a very simple ASP.net page. I should note this is my first attempt at creating an Oracle Proc.
Here is my code that calls the proc (just trying to call it and force results into the label)
string oradb = "connection string here";
OracleConnection conn = new OracleConnection(oradb);
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "x.GETCURSORS";
cmd.CommandType = CommandType.StoredProcedure;
OracleParameter ACTNUM = new OracleParameter();
ACTNUM.OracleDbType = OracleDbType.Decimal;
ACTNUM.Direction = ParameterDirection.Input;
ACTNUM.Value ="12345";
cmd.Parameters.Add(ACTNUM);
OracleParameter REJECTS_C = new OracleParameter();
REJECTS_C.OracleDbType = OracleDbType.RefCursor;
REJECTS_C.Direction = ParameterDirection.Output;
cmd.Parameters.Add(REJECTS_C);
try
{
conn.Open();
OracleDataReader objReader = cmd.ExecuteReader();
Label3.Text = objReader.ToString();
}
catch (Exception ex)
{
Label3.Text = string.Format("Exception: {0}", ex.ToString());
}
Package specification:
PACKAGE "x"."REJECTS_DATA" IS
PROCEDURE "GETCURSORS" (
"ACTNUM" IN NUMBER,
"REJECTS_C" OUT SYS_REFCURSOR);
END "REJECTS_DATA";
Package body:
PACKAGE BODY "x"."REJECTS_DATA" IS
PROCEDURE "GETCURSORS" (
"ACTNUM" IN NUMBER,
"REJECTS_C" OUT SYS_REFCURSOR) IS
BEGIN
OPEN REJECTS_C FOR SELECT * FROM x.a
WHERE x.a.ACCOUNT = ACTNUM;
END "GETCURSORS";
END "REJECTS_DATA";

Assuming that the schema name is X, the package name is REJECTS_DATA, and the procedure name is GETCURSORS, at a minimum, the command would need to be
cmd.CommandText = "x.REJECTS_DATA.GETCURSORS";
If you are actually using case-sensitive identifers in PL/SQL (which I would strongly suggest avoiding), you would need to use case-sensitive identifiers in the procedure name as well.

We faced the same issue in our code and had to keep SCHEMA_NAME out of our proc call in C#, i.e. PACKAGE_NAME.PROC_NAME. We resolved this by creating a Synonym in the database with the SCHEMA_NAME

Unable to insert data to database in asp.net C#

I'm new in C# programming, so I'll appreciate if anyone can help me. I know there are similar question but I still can't find the solution for my problem. I'm developing a mock system, where when user bought the product, the system will store all the transaction details. the problem is, I cannot insert the data into the database. Here's the code:
using (SqlConnection conn = new SqlConnection
(ConfigurationManager.ConnectionStrings["database"].ConnectionString))
{
string QueryA = "#Insert into TransDetails(AccountNumber,Amount,Provider"
+ ",Mobile Number,TransNum,TransDate, Status) "
+ " Values (#AccountNumber,#Amount,#Provider,#Mobile Number,"
+ "#TransNum,#TransDate,#Status";
using (SqlCommand cmd = new SqlCommand("InsertRecord", conn))
{
conn.Open();
cmd.CommandType = CommandType.Text;
cmd.CommandText = QueryA;
cmd.Parameters.AddWithValue("#AccountNumber", acc.Text);
cmd.Parameters.AddWithValue("#Amount", lblAmount.Text);
cmd.Parameters.AddWithValue("#Provider", lblProvider.Text);
cmd.Parameters.AddWithValue("#Mobile Number", lblNumber.Text);
cmd.Parameters.AddWithValue("#TransNum", lblTrans.Text);
cmd.Parameters.AddWithValue("#TransDate", lblDate.Text);
cmd.Parameters.AddWithValue("#Status", status.Text);
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch
{
lblMessage.Text = "Error";
}
finally
{
conn.Close();
}
}
}
and the stores procedures are as follows:
ALTER PROCEDURE InsertRecord1
#AccountNumber int,
#Amount nchar(10),
#Provider nchar(10),
#MobileNumber int,
#TransNum nchar(10),
#TransDate date,
#Status nchar(10)
AS
Insert into TransDetails(AccountNumber,Amount,Provider,MobileNumber,TransNum,TransDate,Status)
Values (#AccountNumber,#Amount,#Provider,#MobileNumber,#TransNum,#TransDate,#Status)
return
Really appreciate any help.
P/S: i dont know why the beginning of the stored procedures started with "alter".

I may be reading it wrong, but it looks like your stored procedure is not used at all. Try commenting out "cmd.CommandText = QueryA;" and substitute "cmd.CommandText = "InsertRecord1";" and change CommandType to StoredProcedure.
QueryA, by the way, is missing a paren at the end. However, the whole thing is unnecessary since you have a stored procedure that does the same thing and it's almost always preferable to use a stored procedure rather than embedded DML.

You must escape Mobile Number while brackets
Insert into TransDetails(AccountNumber,Amount,Provider,[Mobile Number],...
and remove the space in your parameter
...,#MobileNumber,#TransNum,#TransDate,#Status
and change the paramname in your command parameter
cmd.Parameters.AddWithValue("#MobileNumber", lblNumber.Text);
but seeing your stored procedure, the column Mobile Number has no space between it. Is it a typo error in your query on QueryA? If it is, then remove the space on it (also on parameter name)
Insert into TransDetails(AccountNumber,Amount,Provider,MobileNumber,...
or
change your CommandType.Text to CommandType.StoredProcedure and remove this line,
cmd.CommandText = QueryA;

You're using the wrong overload of the SqlCommand constructor. According to MSDN:
new SqlCommand(string, SqlConnection) Initializes a new instance of the SqlCommand class with the text of the query and a SqlConnection.
What you need to do is either set your CommandType for the sql command to CommandType.StoredProcedure and not use QueryA, or initialize the sql command with QueryA and not make use of your stored procedure.

As you can see there is # at the start of your SQL Statement.
Also you are not really using the Store Procedure.

You can Try this:
using (SqlConnection conn = new SqlConnection (ConfigurationManager.ConnectionStrings["database"].ConnectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand("InsertRecord1", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#AccountNumber", acc.Text);
cmd.Parameters.AddWithValue("#Amount", lblAmount.Text);
cmd.Parameters.AddWithValue("#Provider", lblProvider.Text);
cmd.Parameters.AddWithValue("#Mobile Number", lblNumber.Text);
cmd.Parameters.AddWithValue("#TransNum", lblTrans.Text);
cmd.Parameters.AddWithValue("#TransDate", lblDate.Text);
cmd.Parameters.AddWithValue("#Status", status.Text);
try
{
cmd.ExecuteNonQuery();
}
catch
{
lblMessage.Text = "Error";
}
finally
{
conn.Close();
}
}
Tho I don't use SQL Commands, Adapters...etc. to access the data from the SQL Database. I prefer Microsoft Data Access ApplicationBlocks which is easy-to-use library provided by Microsoft to access data from SQL Server.
Download
You can download it here http://download.microsoft.com/download/VisualStudioNET/daabref/RTM/NT5/EN-US/DataAccessApplicationBlock.msi
Introduction
https://web.archive.org/web/20210304123854/https://www.4guysfromrolla.com/articles/062503-1.aspx

ASP.NET and Oracle Stored Procedure Error

I am VERY new when it comes to stored procedures and .NET, so I apologize in advance. I have a stored procedure that I am trying to use and I keep getting this error..."wrong number or types of arguments in call to 'COPY_ACCOUNT'". I am not sure why. Below is my stored procedure code followed by my C#.NET code. Any help is GREATLY appreciated. PLEASE.
create or replace procedure abstract_names.copy_account(r_rows_copied out int,
ar_old_acct in abn_headings.acct_no%type,
ar_new_acct in abn_headings.acct_no%type)
is
cnt int := 0;
begin
r_rows_copied := 0;
for r in (select heading from abn_headings where acct_no = ar_old_acct) loop
copy_heading(cnt, ar_old_acct, r.heading, ar_new_acct);
r_rows_copied := r_rows_copied + cnt;
end loop;
dbms_output.put_line('called abstract_names.copy_account '||to_char(r_rows_copied));
return; end;
Then my C#.NET code...
using System.Data.OracleClient;
try
{
conn.Open();
OracleCommand cmd = new OracleCommand();
cmd.Parameters.Add("r_rows_copied", OracleType.Int32).Direction = ParameterDirection.Output;
cmd.Parameters.Add("ar_from_acct", OracleType.VarChar).Value = accountNumberDropDownList.SelectedValue.ToString();
cmd.Parameters.Add("ar_to_acct", OracleType.VarChar).Value = copyAccountDDL.SelectedValue.ToString();
cmd = new OracleCommand("abstract_names.copy_account", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();
conn.Close();
/*
abstract_names.copy_account(r_rows_copied out int,
ar_from_acct in abn_headings.acct_no%type,
ar_to_acct in abn_headings.acct_no%type)
*/
}
finally
{
if (conn != null)
conn.Close();
}
My connection string is correct because I use it else where in my code and it works. The commented section is the stored procedure i am trying to use obviously. Please help me!

Just looking at your code and not being familiar with this OracleCommand object, it looks like you're creating parameters and then creating a new object in the middle wiping out all your parameter additions. Create a new object from the connection and then add your parameters. Attempting a stab at better code below. Also I would use using statements for any conneciton,commnand objects to ensure they get closed and disposed.
Edit: Didn't look too deep, my fault. It looks like the parameter names weren't matching up in the stored procedure and the .net code. Also since you're returning a value, I would use the ExecuteScalar method, ExeuteNonQuery won't return any data.
cmd = new OracleCommand("abstract_names.copy_account", conn);
cmd.Parameters.Add("r_rows_copied", OracleType.Int32).Direction = ParameterDirection.Output;
cmd.Parameters.Add("ar_old_acct ", OracleType.VarChar).Value = accountNumberDropDownList.SelectedValue.ToString();
cmd.Parameters.Add("ar_new_acct", OracleType.VarChar).Value = copyAccountDDL.SelectedValue.ToString();
cmd.CommandType = CommandType.StoredProcedure;
object value = cmd.ExecuteScalar();
conn.Close();

You assign a new instance to your cmd variable, then you lose reference to what you had done.
Here:
cmd.Parameters.Add("ar_to_acct", OracleType.VarChar).Value = copyAccountDDL.SelectedValue.ToString();
cmd = new OracleCommand("abstract_names.copy_account", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();
conn.Close();
This is the wrong line:
cmd = new OracleCommand("abstract_names.copy_account", conn);
Just by looking at your code, I think you should simply remove that line and it should be OK.