指纹登录数据库连接失败跳转紧急开锁页面

DM_Weight/App.config

@@ -93,7 +93,7 @@
 		<!-- 指纹机号码 -->
 		<add  key="machineNumber" value="1"/>
 		<!-- 指纹机ip -->
-		<add  key="fingerIp" value="192.168.1.201"/>
+		<add  key="fingerIp" value="192.168.50.201"/>
 
 		<!-- 多处方取药 0:不启用 1：启用-->
 		<add  key="MultiOrder" value="1"/>

DM_Weight/Finger/FingerprintUtil.cs

@@ -32,10 +32,10 @@ namespace DM_Weight.Finger
         {
             _eventAggregator = eventAggregator;
             logger.Info($"进入构造器，开始连接指纹机");
-            Task.Run(() =>
+           // Task.Run(() =>
-           {
+           //{
                ConnectionMain();
-           });
+           //});
         }
 
         public void ConnectionMain()

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
         {
@@ -62,6 +61,9 @@ namespace DM_Weight.ViewModels
         }
         private DelegateCommand? _exitCommand;
         public DelegateCommand ExitCommand => _exitCommand ??= new DelegateCommand(Exit);
+
+        public bool KeepAlive => false;
+
         void Exit()
         {
             Process.GetCurrentProcess().Kill();
@@ -86,5 +88,22 @@ namespace DM_Weight.ViewModels
                 }
             });
         }
+
+
+        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

@@ -371,6 +371,9 @@ _exitCommand ??= new DelegateCommand(Exit);
             {
                 if (msg.Message.Equals("LOGIN"))
                 {
+                    try
+                    {
+
                         UserList userList = SqlSugarHelper.Db.Queryable<UserList>()
 
                         .Includes<RoleDm>(u => u.Role)
@@ -425,6 +428,21 @@ _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");
+                            //System.Windows.Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Send, new Action(() =>
+                            //{
+                            //    _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>