WinForms: Flickering on Panel Control During Resize Events - Need Optimization Tips
I'm migrating some code and I'm performance testing and I'm wondering if anyone has experience with I'm trying to debug I've been struggling with this for a few days now and could really use some help. Hey everyone, I'm running into an issue that's driving me crazy. I'm working on a WinForms application where I have a Panel control that contains several dynamically added controls. When I resize the form, I notice that the panel flickers a lot, which is distracting for the end user. I've tried overriding the `OnPaint` method of the panel, but it still doesn't help with the flickering scenario. Here’s a simplified version of what I have: ```csharp public class CustomPanel : Panel { protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); // Custom paint logic } } ``` Additionally, I have set the following properties in the Form designer for the panel: - `DoubleBuffered` to `true` (though this doesn't seem to help) - `AutoScroll` to `true` I've also tried to explicitly call `Invalidate()` on the panel during the resize event, but that just made the flickering worse. Here’s the relevant part of my Form's resize event: ```csharp private void MyForm_Resize(object sender, EventArgs e) { myPanel.Invalidate(); // This causes flickering } ``` I’m currently using .NET Framework 4.8 and running this on Windows 10. Is there a better way to manage the resizing of the panel to eliminate flickering? Any best practices or design patterns I should be considering? Would using a different approach, like manually managing the layout of the controls, help mitigate this scenario? Any suggestions or examples would be greatly appreciated! This is part of a larger application I'm building. What am I doing wrong? My development environment is Windows. For reference, this is a production web app. Could someone point me to the right documentation? I'm on Windows 11 using the latest version of C#. What's the correct way to implement this? This is happening in both development and production on Windows 11. I'm using C# 3.11 in this project.