private void BtnLogin_Click(object sender, EventArgs e) { if (edtUsername.Text == "") { Toast Meutoast; Meutoast = Toast.MakeText(this, "Preencha campo Usuario", ToastLength.Short); Meutoast.Show(); } if (edtPassword.Text == string.Empty) { Toast Meutoast; Meutoast = Toast.MakeText(this, "Preencha campo Senha", ToastLength.Long); Meutoast.Show(); return; } bool existe = controlador.UsuarioExiste(edtUsername.Text, edtPassword.Text); if (existe) { Toast Meutoast; Meutoast = Toast.MakeText(this, "Bem Vindo", ToastLength.Short); Meutoast.Show(); } else { Toast MeuToast; MeuToast = Toast.MakeText(this, "Usuario ou senha invalido", ToastLength.Short); MeuToast.Show(); } }