private void CB_Empl_SelectionChanged(object sender, SelectionChangedEventArgs e)
 {
     if (TB_Quantity.Text != "")
     {
         using (var DB = new SkladModel())
         {
             TB_Result.Text = DB.ResultCount(Convert.ToInt32(CB_Product.SelectedValue), Convert.ToInt32(TB_Quantity.Text)).ToString();
         }
     }
 }
 private void TB_Quantity_TextChanged(object sender, TextChangedEventArgs e)
 {
     if (CB_Product.SelectedValue != null)
     {
         using (var DB = new SkladModel())
         {
             decimal count = 0;
             count = count + DB.ResultCount(Convert.ToInt32(CB_Product.SelectedValue),
                                            Convert.ToInt32(TB_Quantity.Text));
             TB_Result.Text = Convert.ToString(count);
         }
     }
 }