修复物品市场排序问题 (#31)

Author: Richasy

src/ViewModel/ViewModel.Uwp/ItemOrderPageViewModel/ItemOrderPageViewModel.cs

@@ -111,15 +111,15 @@ private void Filter()
             {
                 orders = orders.OrderBy(p => p.Platinum);
             }
-            else if (CurrentOrderType.Key == PriceDescending)
+            else if (CurrentSortType.Key == PriceDescending)
             {
                 orders = orders.OrderByDescending(p => p.Platinum);
             }
-            else if (CurrentOrderType.Key == CountAscending)
+            else if (CurrentSortType.Key == CountAscending)
             {
                 orders = orders.OrderBy(p => p.Quantity);
             }
-            else if (CurrentOrderType.Key == CountDescending)
+            else if (CurrentSortType.Key == CountDescending)
             {
                 orders = orders.OrderByDescending(p => p.Quantity);
             }