指纹登录添加连不上数据库跳转紧急开锁页面

DM_Weight/ViewModels/EmergencyWindowViewModel.cs

@@ -18,7 +18,7 @@ using System.Windows.Threading;
 
 namespace DM_Weight.ViewModels
 {
-    public class EmergencyWindowViewModel : BindableBase
+    public class EmergencyWindowViewModel : BindableBase, IRegionMemberLifetime, INavigationAware
     {
         private readonly ILog logger = LogManager.GetLogger(typeof(HomeWindowViewModel));
         IEventAggregator _eventAggregator;
@@ -34,7 +34,6 @@ namespace DM_Weight.ViewModels
             _portUtil = portUtil;
             _eventAggregator = eventAggregator;
             _regionManager = regionManager;
-            CheckDBConnect();
         }
         public DelegateCommand<string> OpenDrawer
         {
@@ -86,5 +85,21 @@ namespace DM_Weight.ViewModels
                 }
             });
         }
+        public bool KeepAlive => false;
+        public void OnNavigatedTo(NavigationContext navigationContext)
+        {
+            DBConnectionStatus = !App.DbConnectionFail;
+            CheckDBConnect();
+        }
+
+        public bool IsNavigationTarget(NavigationContext navigationContext)
+        {
+            return true;
+        }
+
+        public void OnNavigatedFrom(NavigationContext navigationContext)
+        {
+
+        }
     }
 }

DM_Weight/ViewModels/LoginWindowViewModel.cs

@@ -375,6 +375,10 @@ _exitCommand ??= new DelegateCommand(Exit);
                 logger.Info($"msg.Message:{msg.Message};{msg.Message.Equals("LOGIN")}");
                 if (msg.Message.Equals("LOGIN"))
                 {
+                    try
+                    {
+
+
                         UserList userList = new UserList();
                         userList = SqlSugarHelper.Db.Queryable<UserList>()
                         .Includes<RoleDm>(u => u.Role)
@@ -434,6 +438,16 @@ _exitCommand ??= new DelegateCommand(Exit);
                             SetUser(userList);
                         }
                     }
+                    catch (Exception ex)
+                    {
+                        if (ex.Message.Contains("连接数据库过程中发生错误"))
+                        {
+                            App.DbConnectionFail = true;
+                            _regionManager.RequestNavigate("MainRegion", "EmergencyWindow");
+                        }
+                        logger.Info(ex.Message);
+                    }
+                }
             }
 
         }

DM_Weight/Views/EmergencyWindow.xaml

@@ -28,7 +28,7 @@
                 <ColumnDefinition Width="Auto" />
                 <ColumnDefinition Width="Auto" />
             </Grid.ColumnDefinitions>
-            <Grid Margin="0" Grid.Column="0" Width="280"  Visibility="{Binding Is8Drawer, Converter={StaticResource BooleanToVisibilityConverter}}">
+            <Grid Margin="0" Grid.Column="0" Width="280">
                 <Grid.Background>
                     <ImageBrush ImageSource="/Images/box.png" />
                 </Grid.Background>