我尝试从收到错误的 GridView 中对数据进行排序（启用排序）。变量名称在查询批处理或存储过程中必须是唯一的。2.这里和适配器
{
istorijaKupovinaDataSource.SelectCommand = @"
SELECT k.Datum, p.Naziv AS Proizvodjac, l.Naziv AS Lek, k.Kolicina, k.Cena, ni.Naziv AS NacinIsporuke
FROM Kupovina k
INNER JOIN Lek l ON k.LekId = l.Id
INNER JOIN NacinIsporuke ni ON k.NacinIsporukeID = ni.Id
INNER JOIN Proizvodjac p ON l.ProizvodjacId = p.Id
INNER JOIN Kupac u ON k.KupacId = u.Id
WHERE u.KorisnickoIme = @KorisnickoIme
ORDER BY k.Datum";
istorijaKupovinaDataSource.SelectParameters.Add("KorisnickoIme", DbType.String, User.Identity.Name);
}
public static void Kupi(long lekID, int kolicina, decimal cena, long nacinIsporukeID, string korisnickoIme)
{
SqlConnection con = new SqlConnection();
try
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["OnlineApotekaConnectionString"].ConnectionString;
con.Open();
string updateLager = @"
UPDATE Lager
SET Kolicina=Kolicina-@Kolicina
WHERE LekID=@LekID";
SqlCommand cmd = new SqlCommand(updateLager, con);
cmd.Parameters.AddWithValue("@LekID", lekID);
cmd.Parameters.AddWithValue("@Kolicina", kolicina);
cmd.ExecuteNonQuery();
string insertIntoKupovina=@"
INSERT INTO Kupovina (KupacID, LekID, Datum, Kolicina, Cena, NacinIsporukeID)
VALUES (@KupacID, @LekID, @Datum, @Kolicina, @Cena, @NacinIsporukeID)";
cmd = new SqlCommand(insertIntoKupovina, con);
cmd.Parameters.AddWithValue("@KupacID", KupacAdapter.GetID(korisnickoIme));
cmd.Parameters.AddWithValue("@LekID", lekID);
cmd.Parameters.AddWithValue("@Datum", DateTime.Now.Date);
cmd.Parameters.AddWithValue("@Kolicina", kolicina);
cmd.Parameters.AddWithValue("@Cena", cena);
cmd.Parameters.AddWithValue("@NacinIsporukeID", nacinIsporukeID);
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
con.Close();
}
}
}
{ SqlConnection con = new SqlConnection();
try
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["OnlineApotekaConnectionString"].ConnectionString;
con.Open();
string selectQuery = @"
SELECT ID
FROM Kupac
WHERE KorisnickoIme = @KorisnickoIme";
SqlCommand cmd = new SqlCommand(selectQuery, con);
cmd.Parameters.AddWithValue("@KorisnickoIme", korisnickoIme);
return Convert.ToInt64(cmd.ExecuteScalar());
}
catch (Exception err)
{
throw err;
}
finally
{
con.Close();
}
}
public List<Kupac> SelectAll()
{
List<Kupac> list = new List<Kupac>();
SqlConnection con = new SqlConnection();
try
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["OnlineAotekaConnectionString"].ConnectionString;
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
string selectQuery = "SELECT * FROM Kupac";
cmd.CommandText = selectQuery;
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
list.Add(new Kupac(reader["Jmbg"].ToString(), reader["Ime"].ToString(), reader["Prezime"].ToString(), reader["Telefon"].ToString(), reader["Adresa"].ToString(), reader["Email"].ToString(), reader["KorisnickoIme"].ToString()));
}
reader.Close();
return list;
}
catch (Exception err)
{
throw err;
}
finally
{
con.Close();
}
}
}