Add mock constructors to allow designer to instantiate viewmodels.

RomRepoMgr/ViewModels/EditDatViewModel.cs

@@ -49,6 +49,41 @@ public class EditDatViewModel : ViewModelBase
     string               _name;
     string               _version;
 
+    // Mock
+    public EditDatViewModel()
+    {
+        var romSet = new RomSetModel
+        {
+            Author             = "Author",
+            Comment            = "Comment",
+            Category           = "Category",
+            Date               = "Date",
+            Description        = "Description",
+            Homepage           = "http://example.com",
+            Name               = "Name",
+            Version            = "Version",
+            Filename           = "Filename.dat",
+            Sha384             = "MOCKEDSHA384HASH",
+            TotalMachines      = 100,
+            CompleteMachines   = 80,
+            IncompleteMachines = 20,
+            TotalRoms          = 1000,
+            HaveRoms           = 800,
+            MissRoms           = 200,
+            Id                 = 1
+        };
+
+        _romSet      = romSet;
+        _name        = romSet.Name;
+        _version     = romSet.Version;
+        _author      = romSet.Author;
+        _comment     = romSet.Comment;
+        _category    = romSet.Category;
+        _date        = romSet.Date;
+        _description = romSet.Description;
+        _homepage    = romSet.Homepage;
+    }
+
     public EditDatViewModel(EditDat view, RomSetModel romSet)
     {
         _view         = view;

RomRepoMgr/ViewModels/ExportDatViewModel.cs

@@ -49,6 +49,9 @@ public sealed class ExportDatViewModel : ViewModelBase
     bool                 _progressVisible;
     string               _statusMessage;
 
+    // Mock
+    public ExportDatViewModel() {}
+
     public ExportDatViewModel(ExportDat view, string datHash, string outPath)
     {
         _view                    =  view;

RomRepoMgr/ViewModels/ExportRomsViewModel.cs

@@ -58,6 +58,14 @@ public sealed class ExportRomsViewModel : ViewModelBase
     string              _status3Message;
     string              _statusMessage;
 
+    // Mock
+    public ExportRomsViewModel()
+    {
+#pragma warning disable PH2080
+        FolderPath = "C:\\ExportedRoms";
+#pragma warning restore PH2080
+    }
+
     public ExportRomsViewModel(ExportRoms view, string folderPath, long romSetId)
     {
         _view        = view;

RomRepoMgr/ViewModels/ImportDatFolderViewModel.cs

@@ -64,6 +64,14 @@ public sealed class ImportDatFolderViewModel : ViewModelBase
     string                   _status2Message;
     string                   _statusMessage;
 
+    // Mock
+    public ImportDatFolderViewModel()
+    {
+#pragma warning disable PH2080
+        FolderPath = "C:\\ROMs";
+#pragma warning restore PH2080
+    }
+
     public ImportDatFolderViewModel(ImportDatFolder view, string folderPath)
     {
         _view             = view;

RomRepoMgr/ViewModels/ImportDatViewModel.cs

@@ -48,6 +48,9 @@ public sealed class ImportDatViewModel : ViewModelBase
     bool                 _progressVisible;
     string               _statusMessage;
 
+    // Mock
+    public ImportDatViewModel() {}
+
     public ImportDatViewModel(ImportDat view, string datPath)
     {
         _view                            =  view;

RomRepoMgr/ViewModels/ImportRomFolderViewModel.cs

@@ -61,6 +61,14 @@ public sealed class ImportRomFolderViewModel : ViewModelBase
     string                   _status2Message;
     string                   _statusMessage;
 
+    // Mock
+    public ImportRomFolderViewModel()
+    {
+#pragma warning disable PH2080
+        FolderPath = "C:\\ROMs";
+#pragma warning restore PH2080
+    }
+
     public ImportRomFolderViewModel(ImportRomFolder view, string folderPath)
     {
         _view                   = view;

RomRepoMgr/ViewModels/MainWindowViewModel.cs

@@ -52,6 +52,9 @@ public class MainWindowViewModel : ViewModelBase
     RomSetModel         _selectedRomSet;
     Vfs                 _vfs;
 
+    // Mock
+    public MainWindowViewModel() {}
+
     public MainWindowViewModel(MainWindow view, List<RomSetModel> romSets)
     {
         _view                  = view;

RomRepoMgr/ViewModels/RemoveDatViewModel.cs

@@ -35,9 +35,20 @@ using RomRepoMgr.Views;
 
 namespace RomRepoMgr.ViewModels;
 
-public sealed class RemoveDatViewModel(RemoveDat view, long romSetId) : ViewModelBase
+public sealed class RemoveDatViewModel : ViewModelBase
 {
-    string _statusMessage;
+    readonly long      _romSetId;
+    readonly RemoveDat _view;
+    string             _statusMessage;
+
+    // Mock
+    public RemoveDatViewModel() {}
+
+    public RemoveDatViewModel(RemoveDat view, long romSetId)
+    {
+        _view     = view;
+        _romSetId = romSetId;
+    }
 
     public string StatusMessage
     {
@@ -53,7 +64,7 @@ public sealed class RemoveDatViewModel(RemoveDat view, long romSetId) : ViewMode
 
             Dispatcher.UIThread.Post(() => StatusMessage = Localization.RetrievingRomSetFromDatabase);
 
-            RomSet romSet = ctx.RomSets.Find(romSetId);
+            RomSet romSet = ctx.RomSets.Find(_romSetId);
 
             if(romSet == null) return;
 
@@ -93,7 +104,7 @@ public sealed class RemoveDatViewModel(RemoveDat view, long romSetId) : ViewMode
 
             if(File.Exists(compressedDatPath)) File.Delete(compressedDatPath);
 
-            Dispatcher.UIThread.Post(view.Close);
+            Dispatcher.UIThread.Post(_view.Close);
         });
     }
 }

RomRepoMgr/ViewModels/SettingsViewModel.cs

@@ -56,6 +56,9 @@ public sealed class SettingsViewModel : ViewModelBase
     string                  _unArPath;
     string                  _unArVersion;
 
+    // Mock
+    public SettingsViewModel() {}
+
     public SettingsViewModel(SettingsDialog view)
     {
         _view              = view;

RomRepoMgr/ViewModels/UpdateStatsViewModel.cs

@@ -51,6 +51,9 @@ public sealed class UpdateStatsViewModel : ViewModelBase
     RomSetModel          _selectedRomSet;
     string               _statusMessage;
 
+    // Mock
+    public UpdateStatsViewModel() {}
+
     public UpdateStatsViewModel(UpdateStats view)
     {
         _view                 = view;