Question

I searched through this site and found some topic about my problem but still cannot make this work….

I am simply trying to retrieve data from a SQL Server database using a stored procedure.
I am passing one parameter that is a SqlDbType.Varchar(50) type, but I get back a SQL error:

Procedure or function ‘WyszukajPrzesylki’ expects parameter ‘@Nazwisko’, which was not supplied.

What am I doing wrong? Store procedure works if I test it in SSMS …

It even works when I type

SqlCommand com = new SqlCommand("WyszukajPrzesylki @Nazwisko = Example", con);

You are my last hope guys… I’ve already lost 2 days with this problem and cannot get any further… don’t have any problems with inserting and updating records using c# … just this….

So here is the code of SP

ALTER PROCEDURE [dbo].[WyszukajPrzesylki] 
-- Add the parameters for the stored procedure here
@Nazwisko varchar(50)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

-- Insert statements for procedure here
-- SELECT * FROM Przesylki WHERE (NazwiskoAdresata = @NazwiskoAdresata)
SELECT * FROM Przesylki WHERE (Przesylki.NazwiskoAdresata = @Nazwisko)
END

and action of the button:

SqlConnection con = new SqlConnection(Properties.Settings.Default.Monitoring_PrzesylekString1);
SqlCommand com = new SqlCommand("WyszukajPrzesylki", con);
com.CommandType = CommandType.StoredProcedure;
SqlParameter parametrNazwisko = new SqlParameter("@Nazwisko", SqlDbType.VarChar, 50);
parametrNazwisko.Value = "Dziubak";
com.Parameters.Add(parametrNazwisko);

SqlDataAdapter ad = new SqlDataAdapter(com.CommandText, con);
DataSet ds = new DataSet();

ad.Fill(ds, "id");
con.Close();
DataTable datatableA = ds.Tables[0];
dataGridView1.DataSource = ds;
dataGridView1.DataMember = "id";

Answer 1

You’re doing almost everything right – up to this line:

SqlDataAdapter ad = new SqlDataAdapter(com.CommandText, con);

You’re creating a SQL data adapter, but only based on the SQL statement of the com – you should use this instead:

SqlDataAdapter ad = new SqlDataAdapter(com);

You should use the whole com object you’ve already set up with parameters and everything – not just it’s SQL statement text!