private void btAceptar_Click(object sender, EventArgs e) { string userName = this.txtUser.Text; string password = this.txtPass.Text; this.button3.Visible = true; this.button3.Enabled = false; if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(password)) { MessageBox.Show("Ninguno de los campos puede estar vacío"); } else { BusinessLogin bLogin = new BusinessLogin(userName, password); bLogin.CreateFirstUser(); bool isUserTrue = bLogin.CheckUser(); if (isUserTrue) { ControlPanel mPannel = new ControlPanel(); mPannel.UserName = userName; mPannel.Show(); this.Hide(); } else { MessageBox.Show("Usuario Incorrecto, póngase en contacto con el administrador"); this.txtPass.Text = string.Empty; this.txtUser.Text = string.Empty; this.button3.Visible = false; this.button3.Enabled = true; } } }