private void btnLogin_Click(object sender, EventArgs e) { prograsbarLogin.Value = 50; Connector databaseConnection = new MYSQLDatabaseConnection(); DatabaseColumn databaseColumn = new DatabaseColumn(); databaseColumn.user_name = txtUserName.Text.ToString(); databaseColumn.password = txtPassword.Text.ToString(); databaseConnection.SetData(databaseColumn); prograsbarLogin.Value = 80; if (databaseConnection.establish() == true) { if (databaseConnection.CheckLogin() == true) { prograsbarLogin.Value = 100; MainWindow mainWindow = new MainWindow(); this.Hide(); mainWindow.Show(); } else { prograsbarLogin.Value = 100; MessageBox.Show("wrong Password!"); } } else { ServerConfiguration serverConfiguration = new ServerConfiguration(); serverConfiguration.Show(); } }