I am fairly new to C# and I'm trying to set up call to a stored procedure in my database which takes one parameter.
I get the error "Procedure or function 'SP_getName' expects parameter '#username', which was not supplied. "
My Stored procedure works ok when I supply it with the parameter and I run it via SQL management studio.
GO
DECLARE #return_value int
EXEC #return_value = [dbo].[SP_getName]
#username = 'bob101'
SELECT 'Return Value' = #return_value
GO
However when I try and call it the error is with how I'm passing the parameter in, but I can't spot what the issue is.
//create a sql command object to hold the results of the query
SqlCommand cmd = new SqlCommand();
//and a reader to process the results
SqlDataReader reader;
//Instantiate return string
string returnValue = null;
//execute the stored procedure to return the results
cmd.CommandText = "SP_getName";
//set up the parameters for the stored procedure
cmd.Parameters.Add("#username", SqlDbType.NVarChar).Value = "bob101";
cmd.CommandType = CommandType.Text;
cmd.Connection = this.Connection;
// then call the reader to process the results
reader = cmd.ExecuteReader();
Any help in spotting my error would be greatly appreciated!
I've also tried looking at these two posts, but I haven't had any luck:
Stored procedure or function expects parameter which is not supplied
Procedure or function expects parameter, which was not supplied
Thanks!
You have stated:
cmd.CommandType = CommandType.Text;
Therefore you are simply executing:
SP_getName
Which works because it is the first statement in the batch, so you can call the procedure without EXECUTE, but you aren't actually including the parameter. Change it to
cmd.CommandType = CommandType.StoredProcedure;
Or you can change your CommandText to:
EXECUTE SP_getName #username;
As a side note you should Avoid using the prefix 'sp_' for your stored procedures
And a further side note would be to use using with IDisposable objects to ensure they are disposed of correctly:
using (var connection = new SqlConnection("ConnectionString"))
using (var cmd = new new SqlCommand("SP_getName", connection))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("#username", SqlDbType.NVarChar).Value = "bob101";
connection.Open();
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
// Do something
}
}
}
I had this problem, but it wasn't about parameter name of Command Type.
My problem was that when C# calls SP, for each parameter that has no value passes 'default' keyword (i found it in SQL Profiler):
... #IsStop=0,#StopEndDate=default,#Satellite=0, ...
in my case my parameter Type was DateTime :
#StopEndDate datetime
. I Solved my problem by seting default value to this parameter in Stored Procedure :
#StopEndDate datetime=null
Try remove #:
cmd.Parameters.Add("username", SqlDbType.NVarChar).Value = "bob101";
Related
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()
From C# Code, I'm trying to call a PACKAGE.PROCEDURE() from Oracle. In this simple example I should get one value from the procedure call, but all I get is error:
wrong number or types of arguments in call to 'RETURN_NUM'
The procedure is declared as follows:
PROCEDURE return_num(xNum OUT NUMBER) AS
BEGIN
xNum:= 50;
dbms_output.put_line('hello world ' || xNum);
END;
C# code:
Oraclecon.Open();
OleDbCommand myCMD = new OleDbCommand("TEST.return_num", Oraclecon);
myCMD.CommandType = CommandType.StoredProcedure;
myCMD.Parameters.Add("xNum", OleDbType.Numeric);
OleDbDataReader myReader;
myReader = myCMD.ExecuteReader();
Can some one please point out what I'm doing wrong. Then in a real scenario I would like to call a procedure that returns a set of values from a custom Type, such as:
TYPE r_interface_data IS RECORD
(
object_id VARCHAR2(16),
obj_type VARCHAR2(32)
);
TYPE t_interfase_data IS TABLE OF r_interface_data;
How can I approach that. Thanks!
UPDATE: In my particular case I ended-up doing the following approach
using (OleDbCommand cmd = new OleDbCommand("PACKAGE.procedure_name"))
{
cmd.CommandType = CommandType.StoredProcedure;
SqlManager sqlManager = new SqlManager();
return sqlManager.GetDataSet(cmd);
}
I don't think you're that far off... try this:
OracleCommand cmd = new OracleCommand("return_num", Oraclecon);
cmd.Parameters.Add(new OracleParameter("xNum", OracleDbType.Decimal,
ParameterDirection.Output));
cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();
OracleDecimal d = (OracleDecimal)cmd.Parameters[0].Value;
double result = d.ToDouble();
result now contains the out parameter from the procedure.
I think your problem is you were attempting to use a DbDataReader on a stored procedure. DbDataReader is for queries.
Also, I used ODP.net -- that may or may not have contributed to your issue, that you were using Ole.
I am sending ID as outparameter but its giving error
System.Data.SqlClient.SqlException: Procedure or function
'usp_ClientHistoryItem' expects parameter '#ID', which was not
supplied.
Code
using (SqlCommand cmd = new SqlCommand("dbo.usp_ClientHistoryItem", conn))
{
SqlParameter parameterID = new SqlParameter("#ID", oReservation.Id);
parameterID.Direction = ParameterDirection.Output;
cmd.Parameters.Add(parameterID);
cmd.Parameters.Add(new SqlParameter("#PhoneNo", oReservation.ClientPhone));
cmd.Parameters.Add(new SqlParameter("#UserId", oReservation.UserID));
cmd.Parameters.Add(new SqlParameter("#Description", oReservation.Description));
cmd.Parameters.Add(new SqlParameter("#TestId", oReservation.TestId));
cmd.Parameters.Add(new SqlParameter("#StartDate", oReservation.StartDate));
cmd.ExecuteNonQuery();
returnValue = Convert.ToInt32(cmd.Parameters["#ID"].Value);
return returnValue;
}
You seem to be calling a stored procedure - yet you've never defined your SqlCommand to be a stored procedure:
using (SqlCommand cmd = new SqlCommand("dbo.usp_ClientHistoryItem", conn))
{
cmd.CommandType = CommandType.StoredProcedure; // add this line to tell ADO.NET it's a stored procedure!!
If you forget that line, then ADO.NET will try to interpret your stuff as an ad-hoc SQL statement....
this one solve my problem
may be it may helpful
cmd.CommandType = CommandType.StoredProcedure;
Your ID parameter in the stored procedure must be set as OUTPUT parameter. You are just setting it in code not in stored procedure.
Hy guys.
You have to set the property CommandType for the Command to StoredProcedure if that's the case. Otherwise it woun't detect the parameters.
One other reason this error is thrown is when the variable names don't match in your stored procedure and code because the code fails to find the parameter to which the value must be passed. Make sure they match:
Stored procedure:
create procedure getEmployee
#ID
as
Begin
select *
from emp
where id = #ID
End
Code:
SqlParameter p = new SqlParameter("#ID", id);
cmd.Parameter.Add(p);
The parameter #ID must match in both code and stored procedure
If you use dapper, you can use this construction
int id = 1;
var parameters = new DynamicParameters();
parameters.Add("#id", id, DbType.Int32, ParameterDirection.Input);
string sqlQuery = "[dbo].[SomeStoredProcedure]";
using (IDbConnection db = new SqlConnection(ConnectionString))
{
var result = await db.QueryAsync<SpResult>(sqlQuery, parameters, commandType: CommandType.StoredProcedure);
}
This is a simple task that I want to acheive but ASP.NET makes it quite difficult, next to impossible. I followed this question
Running a Stored Procedure in C# Button but found out ExecuteNonQuery does not return the output from query.
I tried this other approach but can't seem to pass the paremeters in this way
SqlConnection myConnection = new SqlConnection(myconnectionString);
SqlCommand myCommand = new SqlCommand();
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.CommandText = "usp_GetCustomer";
myCommand.SelectParameter <-- does not exist
Can someone write this simple code, how can I implement it? Basically I am passing a #username and #month (both character strings) to stored procedure and it returns a number that I want to capture and assign to a label control.
Thank you
The output from my query is this. It runs a complex query, create a temp table and then it runs
select ##rowcount
and I am capturing that.
Don't use SqlCommand.ExecuteNonQuery() if you actually want data from a result set.
Make sure your procedure uses set nocount on
Then use SqlCommand.ExecuteScalar()
return (int)myCommand.ExecuteScalar(); // value of select ##rowcount
Edit: As for your parameters:
myCommand.Parameters.AddWithValue("#username","jsmith");
myCommand.Parameters.AddWithValue("#month","January");
I prefer using linq-to-sql to handle stored procedures. Create a linq-to-sql model, where you add the SP you want to call. This will expose the SP as a function on the generated data context, where the parameters are ordinary C# functions. The returned values will be exposed as a collection of C# objects.
If you have multiple results from the SP things get a bit more complicated, but still quite straight forward.
Use the Parameters collection of the command to set the parameters, and the ExecuteScalar to run the query and get the value from the single-row single-column result.
Use using blocks to make sure that the connection and command are closed and disposed properly in any situation. Note that you have to provide the connection to the command object:
int result;
using (SqlConnection connection = new SqlConnection(myconnectionString)) {
using (SqlCommand command = new SqlCommand(connection)) {
command.CommandType = CommandType.StoredProcedure;
command.CommandText = "usp_GetCustomer";
command.Parameters.Add("#username", SqlDbType.VarChar).Value = username;
command.Parameters.Add("#month", SqlDbType.VarChar).Value = month;
connection.Open();
result = (int)myCommand.ExecuteScalar();
}
}
using(SqlConnection myConnection = new SqlConnection(myconnectionString))
{
SqlCommand myCommand = new SqlCommand();
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.CommandText = "usp_GetCustomer";
myCommand.Parameters.Add("#USER_NAME", SqlDbType.VarChar).Value = sUserName; // user name that you pass to stored procedure
myCommand.Parameters.Add("#Month", SqlDbType.VarChar).Value = iMonth; // Month that you pass to stored procedure
// to get return value from stored procedure
myCommand.Parameters.Add("#ReturnValue", SqlDbType.Int).Direction = ParameterDirection.ReturnValue;
myConnection .Open();
myCommand.ExecuteScalar();
// Returnvalue from stored procedure
return Convert.ToInt32(command.Parameters["#ReturnValue"].Value);
}
Simple code to get return value from SQL Server
SqlConnection myConnection = new SqlConnection(myconnectionString);
SqlCommand myCommand = new SqlCommand();
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.CommandText = "usp_GetCustomer";
myCommand.Parameters.Add("#USER_NAME", SqlDbType.VarChar).Value = sUserName; // user name that you pass to the stored procedure
myCommand.Parameters.Add("#Month", SqlDbType.VarChar).Value = iMonth; //Month that you pass to the stored procedure
// to get return value from the stored procedure
myCommand.Parameters.Add("#ReturnValue", SqlDbType.Int).Direction = ParameterDirection.ReturnValue;
myConnection .Open();
myCommand.ExecuteScalar();
// Returnvalue from the stored procedure
int iReturnValue = Convert.ToInt32(command.Parameters["#ReturnValue"].Value);
Why does this return null?
//seedDate is set to DateTime.Now; con is initialized and open. Not a problem with that
using (SqlCommand command = new SqlCommand("fn_last_business_date", con))
{
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue("#seed_date", seedDate);//#seed_date is the param name
object res = command.ExecuteScalar(); //res is always null
}
But when I call this directly in the DB as follows:
select dbo.fn_last_business_date('8/3/2011 3:01:21 PM')
returns '2011-08-03 15:01:21.000'
which is the result I expect to see when I call it from code
Why, why, why?
Why does everyone insist on the select syntax?..
using (System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("calendar.CropTime", c))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("#RETURN_VALUE", SqlDbType.DateTime).Direction = ParameterDirection.ReturnValue;
cmd.Parameters.AddWithValue("#d", DateTime.Now);
cmd.ExecuteNonQuery();
textBox1.Text = cmd.Parameters["#RETURN_VALUE"].Value.ToString();
}
try:
using (SqlCommand command = new SqlCommand("select dbo.fn_last_business_date(#seed_date)", con))
{
command.CommandType = CommandType.Text;
command.Parameters.AddWithValue("#seed_date", seedDate);//#seed_date is the param name
object res = command.ExecuteScalar(); //res is always null
}
You are actually getting an error that isn't being caught. You don't call scalar udfs like you call stored procedures.
Either wrap the udf in a stored proc, or change syntax. I'm not actually sure what that is because it isn't common...
Ah ha: see these questions:
How to use SQL user defined functions in .NET?
Calling user defined functions in Entity Framework 4