Question

I need my app to get a true / false statement from database & do something with it.

In my Database i have a row called “ban” wich is TinyInt(1) for a true / false statement.

If a user types his license name & license number and clicks a button, my app wil compare the input data with specific rows in my database. So if ok = continue, if not ok, show error.

Also the true/false statement of the inserted input will then be added as a ListBox item.

Now i got that working, but actually i need my app to do something with true or false.

So what i need is to get the true or false from the inserted input, & then use it to say “if false then open new window if true show an error inside a TextBox”

Showing the errors is not a big deal, i got that working. The main thing here is using true or false to either continue or don’t.

I know it has something to do with Boolean, i just don’t know how to work with it.

Here’s what i got so far: (not the complete code but i think this will do)

Thanks!

    public partial class MainWindow : Window
{
    string ConnectionString = Properties.Settings.Default.cloudpos_beheerCS;
    public MainWindow()
    {
        InitializeComponent();
    }

    private void Button_Click_1(object sender, RoutedEventArgs e)
    {
        string Naamtxt = Naam.Text;
        string Licentietxt = Licentie.Text;

        MySqlConnection conn = new MySqlConnection(ConnectionString);
        MySqlCommand cmdDatabase = conn.CreateCommand();
        MySqlDataReader rdr;
        cmdDatabase.CommandText = "SELECT * FROM cloudposgebruikers WHERE licentie = @licentie AND naam = @naam";
        cmdDatabase.Parameters.AddWithValue("@naam", Naamtxt);
        cmdDatabase.Parameters.AddWithValue("@licentie", Licentietxt);

        try
        {
            conn.Open();
        }
        catch (Exception)
        {
            ErrorVerbinding.Content = "Er kan geen verbinding gemaakt worden met de database.";
            return;
        }

        rdr = cmdDatabase.ExecuteReader();
        int ollema = rdr.GetOrdinal("ban");
        while (rdr.Read())
            ListBox1.Items.Add(rdr.GetString(ollema));

            conn.Close();
        }

    }

Answer 1

Ok i found the solution. I didn’t need to make a bool for the task, just 2 lines of code and it works. Thanks anyway guys !

        if (rdr.HasRows)
        {
            while (rdr.Read()) //Make sure this is added or it won't work.
            {
                if (rdr.GetBoolean("ban"))
                {
                    ErrorSuspend.Text = "Uw licentie is verlopen of geblokkeerd.                      Contacteer uw verdeler om een nieuwe licentie te bekomen.";
                    return;
                }

                else
                {
                    Login Login = new Login();
                    this.Content = Login;
                }
            }
        }
        else
        {
            ErrorLN.Content = "Licentie of naam incorrect.";
            return;
        }
    }