forumularz logowania c# sql

Mam problem z kodem do formularza logowania
Po wprowadzeniu danych z bazy danych wyświetla Błąd logowania przy wprowadzeniu innych danych jest ten sam komunikat

Kod:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void button1_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection();
        con.ConnectionString = "Data Source = PC; Initial Catalog = baza; Integrated Security = True";
        con.Open();

        string txtUser = textBox1.Text;
        string txtPasswd = textBox2.Text;
        string query = "SELECT * FROM Tab WHERE User=@user AND Passwd=@passwd";
        SqlCommand cmd = new SqlCommand(query, con);

        cmd.Parameters.AddWithValue("@user", txtUser);
        cmd.Parameters.AddWithValue("@passwd", txtPasswd);

        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.HasRows == true)
        
        {

            MessageBox.Show("Zalogowano");
        }

        else

        {
                MessageBox.Show("Błąd logowania");
            }
        
    }
}
}

con.ConnectionString = "Data Source = Localhost; Initial Catalog = baza; Integrated Security = True";

Rycerz na koniu napisał(a):

con.ConnectionString = "Data Source = Localhost; Initial Catalog = baza; Integrated Security = True";

nic to nie zmieniło w działaniu kodu