优化当穴位设置为Null时，右下边框不消失

Rs.Controls/RsTray.cs

@@ -28,7 +28,8 @@ namespace Rs.Controls
         NotHave,
         Ok,
         Ng,
-        Disable
+        Disable,
+        Null
     }
 
     public partial class RsTray : UserControl
@@ -271,6 +272,14 @@ namespace Rs.Controls
             }
         }
 
+        public void ChangeStatus(ESlotStatus status)
+        {
+            foreach (KeyValuePair<int, TraySlot> kv in traySlotsDic)
+            {
+                ChangeStatus(kv.Value.Index,status);
+            }
+        }
+
         public void ChangeStatus(int index, ESlotStatus status)
         {
             if (traySlotsDic.ContainsKey(index))
@@ -534,15 +543,25 @@ namespace Rs.Controls
                     case ESlotStatus.Disable:
                         g.FillRectangle(new SolidBrush(Color.Gray), Bound.X, Bound.Y, Bound.Width - 1, Bound.Height - 1);
                         break;
+                    case ESlotStatus.Null:
+                        g.FillRectangle(new SolidBrush(Color.FromArgb(11, 16, 36)), Bound.X, Bound.Y, Bound.Width - 1, Bound.Height - 1);
+                        break;
                     default:
                         break;
                 }
+                if(SlotStatus!= ESlotStatus.Null)
+                {
                     g.DrawRectangle(Pens.White, Bound.X, Bound.Y, Bound.Width, Bound.Height);
                     if (isShowText)
                     {
                         g.DrawString(Index.ToString(), new Font("宋体", 8), new SolidBrush(Color.Yellow), _Bound, sf);
                     }
                 }
+                else
+                {
+                    g.DrawRectangle(new Pen(new SolidBrush(Color.FromArgb(11, 16, 36))), Bound.X, Bound.Y, Bound.Width, Bound.Height);
+                }
+            }
         }
 
     }