MySql and Wpf Forms

[Phillip_8]

Hi guys im trying to do a Login system in Wpf with Visual Studio
I got the code and DB working fine with Windows Forms in Visual Studio
I have changed the code 3 times and they all work on Windows forms but not with Wpf Forms.

Below is the code i used, do i need to change it for Wpf? or am i missing something, im still learning so any input would be welcome

using System;
using System.Data;
using System.Windows;
using System.Windows.Forms;
using MySql.Data.MySqlClient;

namespace WpfChatApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>

    public partial class MainWindow : Window
    {
        MySqlConnection connection = new MySqlConnection("server=localhost;username=;password=;database=login");

        public static string Username = "";
        public static string Account_ID = "";

        public MainWindow()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            if (Properties.Settings.Default.Username != string.Empty)
            {
                txtUsername.Text = Properties.Settings.Default.Username;
                txtPassword.Text = Properties.Settings.Default.Password;
            }

        }

        private void BtnLogin_Click(object sender, RoutedEventArgs e)
        {
            Username = txtUsername.Text;
            Hide();
            Main newform = new Main();
            newform.Show();

            Data db = new Data();
            String username = txtUsername.Text;
            String password = txtPassword.Text;

            DataTable Table = new DataTable();
            MySqlDataAdapter adapter = new MySqlDataAdapter();
            MySqlCommand command = new MySqlCommand("SELECT * FROM `users` WHERE `user` = @user and `password` = @pass ", db.getConnection());

            command.Parameters.Add("@user", MySqlDbType.VarChar).Value = username;
            command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = password;

            adapter.SelectCommand = command;
            adapter.Fill(Table);

            if (Table.Rows.Count > 0)
            {
                System.Windows.MessageBox.Show("Logged In");
            }
            else
            {
                if (username.Trim().Equals(""))
                {
                    System.Windows.Forms.MessageBox.Show("Enter your username to Login", "Empty Username", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
                }
                else if (password.Trim().Equals(""))
                {
                    System.Windows.Forms.MessageBox.Show("Enter your password to Login", "Empty Password", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
                }
                else
                {
                    System.Windows.Forms.MessageBox.Show("Wrong Username or Passowrd", "Wrong Data", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
                }
            }


            if (Properties.Settings.Default.Username != string.Empty)
            {
                txtUsername.Text = Properties.Settings.Default.Username;
                txtPassword.Text = Properties.Settings.Default.Password;
            }
        }

        private void BtnRegister_Click(object sender, RoutedEventArgs e)
        {

        }
    }
}

Data.cs

using System.Data;
using MySql.Data.MySqlClient;

namespace WpfChatApp
{
    class Data
    {

        MySqlConnection connection = new MySqlConnection("server=localhost;username=root;password=;database=login");
        MySqlDataAdapter adapter;
        DataTable Table = new DataTable();

        public void openConnection()
        {
            if (connection.State == System.Data.ConnectionState.Closed)
            {
                connection.Open();
            }
        }

        public void closeConnection()
        {
            if (connection.State == System.Data.ConnectionState.Open)
            {
                connection.Close();
            }
        }

        public MySqlConnection getConnection()
        {
            return connection;
        }
    }
}

[pritaeas]

For one, System.Windows.Forms.MessageBox in WPF is System.Windows.MessageBox. Your event functions may be different too.

[Santanu.Das]

Form Load() event is not a way to show a form in wpf.
There has no conception exists as fom like vb form in wpf. Every one is a window. Wpf does not support mdi