I am trying to get the output of a stored procedure into a function but with my code i am always getting a error telling that the output parameter is not specified.Can u help?
the code is here.....
public int UserAuthentication(String username, String password)
{
SqlConnection conn = new SqlConnection("Data Source=...\\..; Initial Catalog=CUSTOMER360;User ID=sa;password=******");
SqlCommand command = new SqlCommand("sp_Campaign_UserAuthentication", conn);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("#login_id", SqlDbType.VarChar, 50, "loginid"));
command.Parameters.Add(new SqlParameter("#password",
SqlDbType.VarChar,50,
"password"));
SqlParameter ret = command.Parameters.Add(" #result", SqlDbType.Int);
ret.Direction = ParameterDirection.ReturnValue;
command.Parameters["#login_id"].Value = username;
command.Parameters["#password"].Value = password;
conn.Open();
command.ExecuteNonQuery();
conn.Close();
return (int)ret.Value;
}
I think the ReturnValue parameter has to be the first in the (edit) command parameter list.
Also, try querying the return parameter's value before closing the connection.
Ensure that your stored proc calls
RETURN (#SomeReturnValue)
Lastly, try removing the leading space in your " #result" parameter name, just in case.
Related
I know this question has been asked many many times, I've gone through most of them but none resolved my issue
I have a stored procedure called LoginValidation which takes 2 parameters, username and password and returns the user_id of the corresponding user.
Here is the procedure code:
#username nvarchar(50),
#password nvarchar(50),
#userID int output
AS
SELECT #userID = user_id
FROM Users_Master
WHERE user_name = #username and password = #password;
RETURN
But, when I'm trying to use this procedure in C# the following error occurs:
Procedure or function 'LoginValidation' expects parameter '#userID', which was not supplied
Here is my C# code:
protected void btnLogin_Click(object sender, EventArgs e)
{
cmd.Connection = con;
con.Open();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "LoginValidation";
cmd.Parameters.Add("#username", SqlDbType.VarChar).Value = txtmobile.Text;
cmd.Parameters.Add("#password", SqlDbType.VarChar).Value = txtpwd.Text;
SqlParameter returnParm = cmd.Parameters.AddWithValue("#userID", SqlDbType.VarChar);
returnParm.Direction = ParameterDirection.ReturnValue;
string id = returnParm.Value.ToString();
try
{
dr = cmd.ExecuteReader();
}
catch (SqlException EX)
{
string ff = EX.Message;
}
if (dr.HasRows)
{
while (dr.Read())
{
Session["name"] = dr["user_name"].ToString();
lblmsg.Text = "Login successful: " + id;
}
}
else
{
lblmsg.Text = "Invalid username/password";
}
dr.Close();
con.Close();
}
Any suggestions please?
Try with returnParm.Direction = ParameterDirection.Output;
Be aware that you're using an incorrect method AddWithValue while passing the data-type. You need to change that to:
SqlParameter returnParm = cmd.Parameters.Add("#userID", SqlDbType.VarChar);
returnParm.Direction = ParameterDirection.Output;
Also you need to set the Direction to Output
Then you need to read the value after executing the query:
dr = cmd.ExecuteReader();
string id = returnParm.Value.ToString();
Docs:
Input: The parameter is an input parameter.
InputOutput: The parameter is capable of both input and output.
Output: The parameter is an output parameter.
ReturnValue: The parameter represents a return value
from an operation such as a stored procedure, built-in function, or
user-defined function.
First you decide that you want to get output parameter or return value parameter.
to get return value parameter. You don't have to pass any extra parameter to stored procedure. just add below lines
SqlParameter returnParameter = cmd.Parameters.Add("RetVal", SqlDbType.Int);
returnParameter.Direction = ParameterDirection.ReturnValue;
cmd.ExecuteNonQuery();
int id = (int) returnParameter.Value;
to get output parameter. All the steps you done are fine. just replace
returnParm.Direction = ParameterDirection.ReturnValue;
with
returnParm.Direction = ParameterDirection.Output;
you are doing mistake. Call
string id = returnParm.Value.ToString();
after
dr = cmd.ExecuteReader();
My stored procedure has an output parameter:
#ID INT OUT
How can I retrieve this using ado.net?
using (SqlConnection conn = new SqlConnection(...))
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add parameters
conn.Open();
// *** read output parameter here, how?
conn.Close();
}
The other response shows this, but essentially you just need to create a SqlParameter, set the Direction to Output, and add it to the SqlCommand's Parameters collection. Then execute the stored procedure and get the value of the parameter.
Using your code sample:
// SqlConnection and SqlCommand are IDisposable, so stack a couple using()'s
using (SqlConnection conn = new SqlConnection(connectionString))
using (SqlCommand cmd = new SqlCommand("sproc", conn))
{
// Create parameter with Direction as Output (and correct name and type)
SqlParameter outputIdParam = new SqlParameter("#ID", SqlDbType.Int)
{
Direction = ParameterDirection.Output
};
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(outputIdParam);
conn.Open();
cmd.ExecuteNonQuery();
// Some various ways to grab the output depending on how you would like to
// handle a null value returned from the query (shown in comment for each).
// Note: You can use either the SqlParameter variable declared
// above or access it through the Parameters collection by name:
// outputIdParam.Value == cmd.Parameters["#ID"].Value
// Throws FormatException
int idFromString = int.Parse(outputIdParam.Value.ToString());
// Throws InvalidCastException
int idFromCast = (int)outputIdParam.Value;
// idAsNullableInt remains null
int? idAsNullableInt = outputIdParam.Value as int?;
// idOrDefaultValue is 0 (or any other value specified to the ?? operator)
int idOrDefaultValue = outputIdParam.Value as int? ?? default(int);
conn.Close();
}
Be careful when getting the Parameters[].Value, since the type needs to be cast from object to what you're declaring it as. And the SqlDbType used when you create the SqlParameter needs to match the type in the database. If you're going to just output it to the console, you may just be using Parameters["#Param"].Value.ToString() (either explictly or implicitly via a Console.Write() or String.Format() call).
EDIT: Over 3.5 years and almost 20k views and nobody had bothered to mention that it didn't even compile for the reason specified in my "be careful" comment in the original post. Nice. Fixed it based on good comments from #Walter Stabosz and #Stephen Kennedy and to match the update code edit in the question from #abatishchev.
For anyone looking to do something similar using a reader with the stored procedure, note that the reader must be closed to retrieve the output value.
using (SqlConnection conn = new SqlConnection())
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add parameters
SqlParameter outputParam = cmd.Parameters.Add("#ID", SqlDbType.Int);
outputParam.Direction = ParameterDirection.Output;
conn.Open();
using(IDataReader reader = cmd.ExecuteReader())
{
while(reader.Read())
{
//read in data
}
}
// reader is closed/disposed after exiting the using statement
int id = outputParam.Value;
}
Not my code, but a good example i think
source: http://www.eggheadcafe.com/PrintSearchContent.asp?LINKID=624
using System;
using System.Data;
using System.Data.SqlClient;
class OutputParams
{
[STAThread]
static void Main(string[] args)
{
using( SqlConnection cn = new SqlConnection("server=(local);Database=Northwind;user id=sa;password=;"))
{
SqlCommand cmd = new SqlCommand("CustOrderOne", cn);
cmd.CommandType=CommandType.StoredProcedure ;
SqlParameter parm= new SqlParameter("#CustomerID",SqlDbType.NChar) ;
parm.Value="ALFKI";
parm.Direction =ParameterDirection.Input ;
cmd.Parameters.Add(parm);
SqlParameter parm2= new SqlParameter("#ProductName",SqlDbType.VarChar);
parm2.Size=50;
parm2.Direction=ParameterDirection.Output;
cmd.Parameters.Add(parm2);
SqlParameter parm3=new SqlParameter("#Quantity",SqlDbType.Int);
parm3.Direction=ParameterDirection.Output;
cmd.Parameters.Add(parm3);
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
Console.WriteLine(cmd.Parameters["#ProductName"].Value);
Console.WriteLine(cmd.Parameters["#Quantity"].Value.ToString());
Console.ReadLine();
}
}
public static class SqlParameterExtensions
{
public static T GetValueOrDefault<T>(this SqlParameter sqlParameter)
{
if (sqlParameter.Value == DBNull.Value
|| sqlParameter.Value == null)
{
if (typeof(T).IsValueType)
return (T)Activator.CreateInstance(typeof(T));
return (default(T));
}
return (T)sqlParameter.Value;
}
}
// Usage
using (SqlConnection conn = new SqlConnection(connectionString))
using (SqlCommand cmd = new SqlCommand("storedProcedure", conn))
{
SqlParameter outputIdParam = new SqlParameter("#ID", SqlDbType.Int)
{
Direction = ParameterDirection.Output
};
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(outputIdParam);
conn.Open();
cmd.ExecuteNonQuery();
int result = outputIdParam.GetValueOrDefault<int>();
}
string ConnectionString = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con = new SqlConnection(ConnectionString))
{
//Create the SqlCommand object
SqlCommand cmd = new SqlCommand(“spAddEmployee”, con);
//Specify that the SqlCommand is a stored procedure
cmd.CommandType = System.Data.CommandType.StoredProcedure;
//Add the input parameters to the command object
cmd.Parameters.AddWithValue(“#Name”, txtEmployeeName.Text);
cmd.Parameters.AddWithValue(“#Gender”, ddlGender.SelectedValue);
cmd.Parameters.AddWithValue(“#Salary”, txtSalary.Text);
//Add the output parameter to the command object
SqlParameter outPutParameter = new SqlParameter();
outPutParameter.ParameterName = “#EmployeeId”;
outPutParameter.SqlDbType = System.Data.SqlDbType.Int;
outPutParameter.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(outPutParameter);
//Open the connection and execute the query
con.Open();
cmd.ExecuteNonQuery();
//Retrieve the value of the output parameter
string EmployeeId = outPutParameter.Value.ToString();
}
Font http://www.codeproject.com/Articles/748619/ADO-NET-How-to-call-a-stored-procedure-with-output
You can get your result by below code::
using (SqlConnection conn = new SqlConnection(...))
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add other parameters parameters
//Add the output parameter to the command object
SqlParameter outPutParameter = new SqlParameter();
outPutParameter.ParameterName = "#Id";
outPutParameter.SqlDbType = System.Data.SqlDbType.Int;
outPutParameter.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(outPutParameter);
conn.Open();
cmd.ExecuteNonQuery();
//Retrieve the value of the output parameter
string Id = outPutParameter.Value.ToString();
// *** read output parameter here, how?
conn.Close();
}
Create the SqlParamObject which would give you control to access methods on the parameters
:
SqlParameter param = new SqlParameter();
SET the Name for your paramter (it should b same as you would have declared a variable to hold the value in your DataBase)
: param.ParameterName = "#yourParamterName";
Clear the value holder to hold you output data
: param.Value = 0;
Set the Direction of your Choice (In your case it should be Output)
: param.Direction = System.Data.ParameterDirection.Output;
That looks more explicit for me:
int? id = outputIdParam.Value is DbNull ? default(int?) : outputIdParam.Value;
I am getting an error as follows :-
Procedure or function 'GetDetails' expects parameter '#Number', which
was not supplied.
Upon debugging , I found that function is getting the values . But I am not sure how to rectify this error . I am unable to understand how to supply values to '#' parameter .
Please help in simple language
You need to add the #Number parameter to your command and set the value.
Here's an example of executing a stored procedure with parameters taken from MSDN.
static void GetSalesByCategory(string connectionString,
string categoryName)
{
using (SqlConnection connection = new SqlConnection(connectionString))
{
// Create the command and set its properties.
SqlCommand command = new SqlCommand();
command.Connection = connection;
command.CommandText = "SalesByCategory";
command.CommandType = CommandType.StoredProcedure;
// Add the input parameter and set its properties.
SqlParameter parameter = new SqlParameter();
parameter.ParameterName = "#CategoryName";
parameter.SqlDbType = SqlDbType.NVarChar;
parameter.Direction = ParameterDirection.Input;
parameter.Value = categoryName;
// Add the parameter to the Parameters collection.
command.Parameters.Add(parameter);
// Open the connection and execute the reader.
connection.Open();
SqlDataReader reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
Console.WriteLine("{0}: {1:C}", reader[0], reader[1]);
}
}
else
{
Console.WriteLine("No rows found.");
}
reader.Close();
}
}
https://msdn.microsoft.com/en-us/library/tyy0sz6b%28v=vs.110%29.aspx
I have stored proc as below:
ALTER PROC pr_Update_Users_Nomination
(
#UserID AS VARCHAR(100),
#Nominated AS BIT
)
AS
UPDATE User
SET isNominated = #Nominated
WHERE
EMPID = #UserID;
I want to call this procedure from c# code: Below is the code I am trying:
void OpenConnection()
{
string Nominated = "False";
//Connection String
string sConnString = System.Configuration.ConfigurationManager.ConnectionStrings["ConString1"].ConnectionString;
SqlConnection mySqlCon = new SqlConnection(sConnString);
SqlCommand mySqlCom = mySqlCon.CreateCommand();
//Call the stored proc and provide in parameters
mySqlCom.CommandText = "EXECUTE pr_Update #UserID #Nominated";
mySqlCom.Parameters.Add("#UserID", SqlDbType.VarChar, 20).Value = UserID;
mySqlCom.Parameters.Add("#Nominated", SqlDbType.Bit).Value = Nominated;
mySqlCon.Open();
mySqlCom.ExecuteNonQuery();
mySqlCon.Close();
}
I get an error saying
Incorrect Syntax near #Nominated
first, when executing a procedure with parameter(s), separate the parameters with a comma
EXECUTE pr_Update #UserID, #Nominated
second, modify your code into this,
string sConnString = System.Configuration.ConfigurationManager.ConnectionStrings["ConString1"].ConnectionString;
using(SqlConnection mySqlCon = new SqlConnection(sConnString))
{
using(SqlCommand mySqlCom = new SqlCommand())
{
mySqlCom.Connection = mySqlCon;
mySqlCom.CommandText = "pr_Update";
mySqlCom.CommandType = CommandType.StoredProcedure;
mySqlCom.Parameters.Add("#UserID", SqlDbType.VarChar, 20).Value = UserID;
mySqlCom.Parameters.Add("#Nominated", SqlDbType.Bit).Value = Nominated;
try
{
mySqlCon.Open();
mySqlCom.ExecuteNonQuery();
}
catch(SqlException ex)
{
// do something with the exception
// don't hide it
}
}
}
You are missing a comma (,) between the parameters.
It should be
mySqlCom.CommandText = "EXECUTE pr_Update #UserID, #Nominated";
mySqlCom.Parameters.Add("#UserID", SqlDbType.VarChar, 20).Value = UserID;
mySqlCom.Parameters.Add("#Nominated", SqlDbType.Bit).Value = Nominated;
Alternatively, since all you are doing is calling a stored proc, you could do:
mySqlCom.CommandType = CommandType.StoredProcedure ;
mySqlCom.CommandText = "pr_Update"; //no need to specify parameter names
mySqlCom.Parameters.Add("#UserID", SqlDbType.VarChar, 20).Value = UserID;
mySqlCom.Parameters.Add("#Nominated", SqlDbType.Bit).Value = Nominated;
Give only name of stored procedure, as you are adding parameter in statements after this. Also set CommandType.
mySqlCom.CommandText = "pr_Update";
mySqlCom.CommandType = CommandType.StoredProcedure;
You are invoking wrong SQL. You should set the command text of command to pr_Update only:
mySqlCom.CommandText = "pr_Update";
And set type command type to stored procedure:
mySqlCom.CommandType = CommandType.StoredProcedure;
See MSDN page for more.
My stored procedure has an output parameter:
#ID INT OUT
How can I retrieve this using ado.net?
using (SqlConnection conn = new SqlConnection(...))
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add parameters
conn.Open();
// *** read output parameter here, how?
conn.Close();
}
The other response shows this, but essentially you just need to create a SqlParameter, set the Direction to Output, and add it to the SqlCommand's Parameters collection. Then execute the stored procedure and get the value of the parameter.
Using your code sample:
// SqlConnection and SqlCommand are IDisposable, so stack a couple using()'s
using (SqlConnection conn = new SqlConnection(connectionString))
using (SqlCommand cmd = new SqlCommand("sproc", conn))
{
// Create parameter with Direction as Output (and correct name and type)
SqlParameter outputIdParam = new SqlParameter("#ID", SqlDbType.Int)
{
Direction = ParameterDirection.Output
};
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(outputIdParam);
conn.Open();
cmd.ExecuteNonQuery();
// Some various ways to grab the output depending on how you would like to
// handle a null value returned from the query (shown in comment for each).
// Note: You can use either the SqlParameter variable declared
// above or access it through the Parameters collection by name:
// outputIdParam.Value == cmd.Parameters["#ID"].Value
// Throws FormatException
int idFromString = int.Parse(outputIdParam.Value.ToString());
// Throws InvalidCastException
int idFromCast = (int)outputIdParam.Value;
// idAsNullableInt remains null
int? idAsNullableInt = outputIdParam.Value as int?;
// idOrDefaultValue is 0 (or any other value specified to the ?? operator)
int idOrDefaultValue = outputIdParam.Value as int? ?? default(int);
conn.Close();
}
Be careful when getting the Parameters[].Value, since the type needs to be cast from object to what you're declaring it as. And the SqlDbType used when you create the SqlParameter needs to match the type in the database. If you're going to just output it to the console, you may just be using Parameters["#Param"].Value.ToString() (either explictly or implicitly via a Console.Write() or String.Format() call).
EDIT: Over 3.5 years and almost 20k views and nobody had bothered to mention that it didn't even compile for the reason specified in my "be careful" comment in the original post. Nice. Fixed it based on good comments from #Walter Stabosz and #Stephen Kennedy and to match the update code edit in the question from #abatishchev.
For anyone looking to do something similar using a reader with the stored procedure, note that the reader must be closed to retrieve the output value.
using (SqlConnection conn = new SqlConnection())
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add parameters
SqlParameter outputParam = cmd.Parameters.Add("#ID", SqlDbType.Int);
outputParam.Direction = ParameterDirection.Output;
conn.Open();
using(IDataReader reader = cmd.ExecuteReader())
{
while(reader.Read())
{
//read in data
}
}
// reader is closed/disposed after exiting the using statement
int id = outputParam.Value;
}
Not my code, but a good example i think
source: http://www.eggheadcafe.com/PrintSearchContent.asp?LINKID=624
using System;
using System.Data;
using System.Data.SqlClient;
class OutputParams
{
[STAThread]
static void Main(string[] args)
{
using( SqlConnection cn = new SqlConnection("server=(local);Database=Northwind;user id=sa;password=;"))
{
SqlCommand cmd = new SqlCommand("CustOrderOne", cn);
cmd.CommandType=CommandType.StoredProcedure ;
SqlParameter parm= new SqlParameter("#CustomerID",SqlDbType.NChar) ;
parm.Value="ALFKI";
parm.Direction =ParameterDirection.Input ;
cmd.Parameters.Add(parm);
SqlParameter parm2= new SqlParameter("#ProductName",SqlDbType.VarChar);
parm2.Size=50;
parm2.Direction=ParameterDirection.Output;
cmd.Parameters.Add(parm2);
SqlParameter parm3=new SqlParameter("#Quantity",SqlDbType.Int);
parm3.Direction=ParameterDirection.Output;
cmd.Parameters.Add(parm3);
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
Console.WriteLine(cmd.Parameters["#ProductName"].Value);
Console.WriteLine(cmd.Parameters["#Quantity"].Value.ToString());
Console.ReadLine();
}
}
public static class SqlParameterExtensions
{
public static T GetValueOrDefault<T>(this SqlParameter sqlParameter)
{
if (sqlParameter.Value == DBNull.Value
|| sqlParameter.Value == null)
{
if (typeof(T).IsValueType)
return (T)Activator.CreateInstance(typeof(T));
return (default(T));
}
return (T)sqlParameter.Value;
}
}
// Usage
using (SqlConnection conn = new SqlConnection(connectionString))
using (SqlCommand cmd = new SqlCommand("storedProcedure", conn))
{
SqlParameter outputIdParam = new SqlParameter("#ID", SqlDbType.Int)
{
Direction = ParameterDirection.Output
};
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(outputIdParam);
conn.Open();
cmd.ExecuteNonQuery();
int result = outputIdParam.GetValueOrDefault<int>();
}
string ConnectionString = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
using (SqlConnection con = new SqlConnection(ConnectionString))
{
//Create the SqlCommand object
SqlCommand cmd = new SqlCommand(“spAddEmployee”, con);
//Specify that the SqlCommand is a stored procedure
cmd.CommandType = System.Data.CommandType.StoredProcedure;
//Add the input parameters to the command object
cmd.Parameters.AddWithValue(“#Name”, txtEmployeeName.Text);
cmd.Parameters.AddWithValue(“#Gender”, ddlGender.SelectedValue);
cmd.Parameters.AddWithValue(“#Salary”, txtSalary.Text);
//Add the output parameter to the command object
SqlParameter outPutParameter = new SqlParameter();
outPutParameter.ParameterName = “#EmployeeId”;
outPutParameter.SqlDbType = System.Data.SqlDbType.Int;
outPutParameter.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(outPutParameter);
//Open the connection and execute the query
con.Open();
cmd.ExecuteNonQuery();
//Retrieve the value of the output parameter
string EmployeeId = outPutParameter.Value.ToString();
}
Font http://www.codeproject.com/Articles/748619/ADO-NET-How-to-call-a-stored-procedure-with-output
You can get your result by below code::
using (SqlConnection conn = new SqlConnection(...))
{
SqlCommand cmd = new SqlCommand("sproc", conn);
cmd.CommandType = CommandType.StoredProcedure;
// add other parameters parameters
//Add the output parameter to the command object
SqlParameter outPutParameter = new SqlParameter();
outPutParameter.ParameterName = "#Id";
outPutParameter.SqlDbType = System.Data.SqlDbType.Int;
outPutParameter.Direction = System.Data.ParameterDirection.Output;
cmd.Parameters.Add(outPutParameter);
conn.Open();
cmd.ExecuteNonQuery();
//Retrieve the value of the output parameter
string Id = outPutParameter.Value.ToString();
// *** read output parameter here, how?
conn.Close();
}
Create the SqlParamObject which would give you control to access methods on the parameters
:
SqlParameter param = new SqlParameter();
SET the Name for your paramter (it should b same as you would have declared a variable to hold the value in your DataBase)
: param.ParameterName = "#yourParamterName";
Clear the value holder to hold you output data
: param.Value = 0;
Set the Direction of your Choice (In your case it should be Output)
: param.Direction = System.Data.ParameterDirection.Output;
That looks more explicit for me:
int? id = outputIdParam.Value is DbNull ? default(int?) : outputIdParam.Value;