Rework Store Tab Updating

qtc-net-client-2/Forms/Main.cs

@@ -22,7 +22,7 @@ namespace qtc_net_client_2
         private IGatewayService _gatewayService;
 
         private Config _config;
-        private ServerConfig _serverConfig;
+        private ServerConfig? _serverConfig;
         private AudioService AudioService = new();
         private ImageFactory _imgFactory = new();
         private CredentialService _credService = new();
@@ -377,17 +377,60 @@ namespace qtc_net_client_2
                 {
                     if (lvStoreItems.Items.Count == storeItems.Data.Count) return;
 
-                    ilStoreThumbnails.Images.Clear();
+                    if (!IsHandleCreated || IsDisposed)
-                    foreach (var item in storeItems.Data)
+                        return;
+
+                    if (InvokeRequired)
                     {
-                        await GetAndAddStoreThumbnail(item);
+                        Invoke(() => ApplyStoreItems(storeItems.Data));
-                        var lvitem = lvStoreItems.Items.Add(new ListViewItem { Text = item.Name, Name = item.Id.ToString() });
+                    }
-                        lvitem.ImageKey = item.Id.ToString();
+                    else
+                    {
+                        ApplyStoreItems(storeItems.Data);
                     }
                 }
             }
         }
 
+        private async void ApplyStoreItems(IEnumerable<StoreItem> storeItems)
+        {
+            ilStoreThumbnails.Images.Clear();
+            lvStoreItems.Items.Clear();
+
+            var items = await BuildListViewItemsAsync(storeItems);
+
+            lvStoreItems.BeginUpdate();
+            try
+            {
+                lvStoreItems.Items.AddRange([.. items]);
+            }
+            finally
+            {
+                lvStoreItems.EndUpdate();
+            }
+        }
+
+        private async Task<List<ListViewItem>> BuildListViewItemsAsync(IEnumerable<StoreItem> storeItems)
+        {
+            var items = new List<ListViewItem>();
+
+            foreach (var item in storeItems)
+            {
+                await GetAndAddStoreThumbnail(item);
+
+                var lvItem = new ListViewItem
+                {
+                    Text = item.Name,
+                    Name = item.Id.ToString(),
+                    ImageKey = item.Id.ToString()
+                };
+
+                items.Add(lvItem);
+            }
+
+            return items;
+        }
+
         private async void lvStoreItems_DoubleClick(object sender, EventArgs e)
         {
             if (lvStoreItems.SelectedItems.Count > 0)