WinForms: DataBinding Performance Issues with Large DataSets in ListBox Control
I've tried everything I can think of but I'm refactoring my project and I'm working on a WinForms application using .NET 5, and I'm experiencing significant performance issues when binding a large dataset (over 10,000 records) to a ListBox control. When I attempt to set the `DataSource` property, the UI becomes unresponsive for several seconds, which is not acceptable for a smooth user experience. I've tried using virtual mode and limiting the number of records displayed initially, but I still encounter delays. I implemented pagination to load a subset of the data as the user scrolls, using the following code: ```csharp private void LoadData(int pageNumber) { var pageSize = 100; var pagedData = myDataSet.Skip((pageNumber - 1) * pageSize).Take(pageSize).ToList(); listBox1.DataSource = pagedData; } ``` However, when I set the `DataSource` again, the ListBox still takes a while to refresh. The basic binding is implemented as follows: ```csharp ListBox listBox1 = new ListBox(); listBox1.DataSource = myDataSet; listBox1.DisplayMember = "Name"; ``` I also noticed that the `SelectedIndexChanged` event is firing multiple times during this operation, which might be contributing to the slowdown. When profiling the application, I see a large number of calls to the `OnDataSourceChanged` method. I've ensured that I'm not doing any heavy processing on the UI thread during these updates. What can I do to improve the performance of this ListBox when handling large datasets? Are there best practices or patterns specific to WinForms that I might be missing? Any help would be greatly appreciated. My development environment is Windows. My team is using Csharp for this mobile app. Thanks for taking the time to read this! Any examples would be super helpful.