查询功能

QueryDetail.xaml.cs

@@ -108,10 +108,10 @@ public partial class QueryDetail : ContentPage
                     if (DateTime.TryParse(item.DispenseEndTime, out DateTime dte))
                     {
                         item.DispenseEndTime = dte.ToString("yyyy-MM-dd HH:mm:ss");
-
                         if (DateTime.TryParse(item.DispenseStartTime, out DateTime dtr))
                         {
-                            item.UsageTime = (dte - dtr).ToString("mm:ss");
+                            //计算用时
+                            item.UsageTime = $"{(int)(dte - dtr).TotalMinutes}:{(dte - dtr).Seconds:D2}";
                         }
                     }
                     if (item.ProductType == 1 && item.Process == null) item.Process = "未知";