private void button_Click(object sender, RoutedEventArgs e)
 {
     SqlCommand cmd = new SqlCommand("SELECT USER_GSI FROM gsi_user WHERE USER_GSI=@user and PASS_GSI=@pass and POSICION_GSI=@admin", con);
     cmd.Parameters.AddWithValue("user", textBox.Text);
     //string pas = passwordBox.SecurePassword();
     cmd.Parameters.AddWithValue("pass", passwordBox.Password);
     cmd.Parameters.AddWithValue("admin", comboBox.Text);
     con.Open();
     SqlDataReader leer = cmd.ExecuteReader();
     if (leer.Read() == true)
     {
         if(comboBox.Text == "Administrator") {
             PanelMenu login = new PanelMenu();
             login.Show();
             Close();
         }
         else
         {
             Window1 lote = new Window1();
             lote.Show();
             Close();
         }
     }
     else
     {
         MessageBox.Show("Usuario y Contraseña no son validos", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
     }
     con.Close();
 }
 private void button_Click(object sender, RoutedEventArgs e)
 {
     Window1 win = new Window1();
     win.Show();
     Close();
 }