[FileLocksmith]Fix crash while opening process handlers (#21602)

* [FileLocksmith]Fix crash while opening processes

* Remove binding on IsExpanded. It's not working

Author: jaimecbernardo

src/modules/FileLocksmith/FileLocksmithLibInterop/interop.cpp

@@ -11,7 +11,6 @@ namespace FileLocksmith::Interop
         System::String^ name;
         System::UInt32 pid;
         array<System::String^>^ files;
-        System::Boolean isExpanded; // For helping in the UI
     };
 
     System::String^ from_wstring_view(std::wstring_view str)
@@ -77,7 +76,6 @@ namespace FileLocksmith::Interop
                 {
                     item->files[j] = from_wstring_view(result_cpp[i].files[j]);
                 }
-                item->isExpanded = false;
 
                 result[i] = item;
             }

src/modules/FileLocksmith/FileLocksmithUI/ViewModels/MainViewModel.cs

@@ -119,33 +119,49 @@ await Task.Run(() =>
 
         private async void WatchProcess(ProcessResult process, CancellationToken token)
         {
-            Process handle = Process.GetProcessById((int)process.pid);
             try
             {
-                await handle.WaitForExitAsync(token);
-            }
-            catch (TaskCanceledException)
-            {
-                // Nothing to do, normal operation
-            }
+                Process handle = Process.GetProcessById((int)process.pid);
+                try
+                {
+                    await handle.WaitForExitAsync(token);
+                }
+                catch (TaskCanceledException)
+                {
+                    // Nothing to do, normal operation
+                }
 
-            if (handle.HasExited)
+                if (handle.HasExited)
+                {
+                    Processes.Remove(process);
+                }
+            }
+            catch (Exception ex)
             {
-                Processes.Remove(process);
+                Logger.LogError($"Couldn't add a waiter to wait for a process to exit. PID = {process.pid} and Name = {process.name}.", ex);
+                Processes.Remove(process); // If we couldn't get an handle to the process or it has exited in the meanwhile, don't show it.
             }
         }
 
         [RelayCommand]
         public void EndTask(ProcessResult selectedProcess)
         {
-            Process handle = Process.GetProcessById((int)selectedProcess.pid);
             try
             {
-                handle.Kill();
+                Process handle = Process.GetProcessById((int)selectedProcess.pid);
+                try
+                {
+                    handle.Kill();
+                }
+                catch (Exception ex)
+                {
+                    Logger.LogError($"Couldn't kill process {selectedProcess.name} with PID {selectedProcess.pid}.", ex);
+                }
             }
-            catch (Exception)
+            catch (Exception ex)
             {
-                Logger.LogError($"Couldn't kill process {selectedProcess.name} with PID {selectedProcess.pid}.");
+                Logger.LogError($"Couldn't get an handle to kill process {selectedProcess.name} with PID {selectedProcess.pid}. Likely has been killed already.", ex);
+                Processes.Remove(selectedProcess); // If we couldn't get an handle to the process, remove it from the list, since it's likely been killed already.
             }
         }
 

src/modules/FileLocksmith/FileLocksmithUI/Views/MainPage.xaml

@@ -103,7 +103,7 @@
                     SelectionMode="None">
                     <ListView.ItemTemplate>
                         <DataTemplate x:DataType="interop:ProcessResult">
-                                <labs:SettingsExpander IsExpanded="{Binding isExpanded}" Margin="0,3,0,0">
+                                <labs:SettingsExpander Margin="0,3,0,0">
                                     <labs:SettingsExpander.Header>
                                         <!--  We can't use the HeaderIcon because it only support a BitmapIcon, which only supports UriSource - not a direct BitmapImage  -->
                                         <StackPanel Orientation="Horizontal">