From 07b536895a861a77f2833cb977833114aef165ea Mon Sep 17 00:00:00 2001
From: zhaotielin <zhaotielin@vip.qq.com>
Date: Mon, 13 Jul 2026 03:51:13 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8E=A7=E5=88=B6=E5=8F=B0=E5=88=B7=E6=96=B0?=
 =?UTF-8?q?=E4=BC=98=E5=8C=96?=
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---
 SSPCTester.UI/App.xaml.cs                     |  5 +++-
 .../ViewModels/ExperimentConsoleViewModel.cs  | 23 +++++++++++++++----
 SSPCTester.UI/ViewModels/TestHostViewModel.cs |  5 +++-
 3 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/SSPCTester.UI/App.xaml.cs b/SSPCTester.UI/App.xaml.cs
index 83a2f78..709ce45 100644
--- a/SSPCTester.UI/App.xaml.cs
+++ b/SSPCTester.UI/App.xaml.cs
@@ -180,7 +180,10 @@ public partial class App : Application
         services.AddTransient<HomeViewModel>();
         services.AddTransient<ProjectInfoViewModel>();
         services.AddTransient<TestHostViewModel>();
-        services.AddTransient<ExperimentConsoleViewModel>();
+        // The experiment console controls application-wide hardware and is not
+        // owned by a project. Keep one instance so switching project pages does
+        // not replace its state or interrupt its refresh loop.
+        services.AddSingleton<ExperimentConsoleViewModel>();
         services.AddTransient<BasicTestViewModel>();
         services.AddTransient<CurveTestViewModel>();
         services.AddTransient<PowerTestViewModel>();
diff --git a/SSPCTester.UI/ViewModels/ExperimentConsoleViewModel.cs b/SSPCTester.UI/ViewModels/ExperimentConsoleViewModel.cs
index 4a31b11..c8658de 100644
--- a/SSPCTester.UI/ViewModels/ExperimentConsoleViewModel.cs
+++ b/SSPCTester.UI/ViewModels/ExperimentConsoleViewModel.cs
@@ -17,6 +17,7 @@ public partial class ExperimentConsoleViewModel : ObservableObject
     private readonly UserSettingsStore _settingsStore;
     private readonly UiLogSink _log;
     private readonly object _pollLock = new();
+    private readonly HashSet<object> _activeHosts = new(ReferenceEqualityComparer.Instance);
     private CancellationTokenSource? _pollCts;
     private Task? _pollTask;
 
@@ -113,12 +114,24 @@ public partial class ExperimentConsoleViewModel : ObservableObject
         LoadCurrentSetpoint = value.Current;
     }
 
-    public void SetActive(bool active)
+    public void SetActive(object host, bool active)
     {
-        if (active)
-            StartPolling();
-        else
-            StopPolling();
+        ArgumentNullException.ThrowIfNull(host);
+
+        lock (_pollLock)
+        {
+            if (active)
+            {
+                _activeHosts.Add(host);
+                StartPolling();
+            }
+            else
+            {
+                _activeHosts.Remove(host);
+                if (_activeHosts.Count == 0)
+                    StopPolling();
+            }
+        }
     }
 
     [RelayCommand]
diff --git a/SSPCTester.UI/ViewModels/TestHostViewModel.cs b/SSPCTester.UI/ViewModels/TestHostViewModel.cs
index 339c645..867a14a 100644
--- a/SSPCTester.UI/ViewModels/TestHostViewModel.cs
+++ b/SSPCTester.UI/ViewModels/TestHostViewModel.cs
@@ -49,6 +49,9 @@ public partial class TestHostViewModel : ObservableObject
 
     private void UpdateConsoleActive()
     {
-        Console.SetActive(_isViewActive && SelectedTabIndex == 0);
+        // Identify this host when acquiring/releasing console polling. During a
+        // project switch WPF can load the new host before unloading the old one;
+        // the old host must not stop the shared console on behalf of the new host.
+        Console.SetActive(this, _isViewActive && SelectedTabIndex == 0);
     }
 }