👀 Views: 164 💬 Answers: 1 📅 Created: 2025-06-05

visual-studio extension wpf data-binding C#

I need some guidance on I'm stuck on something that should probably be simple. I'm working on a Visual Studio extension that creates a custom tool window to display data from a database, but I'm working with an scenario where the window does not refresh when the underlying data changes. I've set up a simple data model and a timer to check for updates, but the UI isn't reflecting those updates. Here's a simplified version of my code: ```csharp public class MyToolWindowControl : UserControl { private Timer _timer; private List<string> _dataList; public MyToolWindowControl() { InitializeComponent(); _dataList = new List<string>(); _timer = new Timer(UpdateData, null, 0, 5000); } private void UpdateData(object state) { // Simulate fetching data from a database _dataList = FetchDataFromDatabase(); // UI update attempt Dispatcher.Invoke(() => UpdateUI()); } private void UpdateUI() { // This method is supposed to refresh the UI with the new data myListView.ItemsSource = null; myListView.ItemsSource = _dataList; } } ``` When I run the extension, the initial load of data works fine, but subsequent changes to the data don't update the list view as expected. I checked the fetched data in the debugger, and it's correct, but the UI doesn't reflect these changes. I've also tried explicitly calling `myListView.Items.Refresh();` after setting the `ItemsSource`, but that hasn't resolved the scenario either. Is there something I might be missing regarding data binding or the way I'm updating the UI? Any suggestions on how to ensure the tool window refreshes appropriately would be greatly appreciated! I'm working on a web app that needs to handle this. I recently upgraded to C# stable. Am I approaching this the right way?