👀 Views: 89 💬 Answers: 1 📅 Created: 2025-06-17

winforms custom-controls splitcontainer resizing csharp

I'm converting an old project and I'm facing an issue with a custom control that I've created in a WinForms application... The control is designed to adjust its size based on the `SplitContainer` in which it's docked. However, when I resize the main form, the control doesn't resize as expected, and sometimes it even overlaps with other controls. I have set the `Dock` property of my custom control to `DockStyle.Fill`, but it appears to be ignoring that setting during resizing. I have tried overriding the `OnResize` method in my custom control to force a layout update, but that hasn't resolved the issue. Here’s a snippet of how I implemented the control: ```csharp public class MyCustomControl : UserControl { public MyCustomControl() { InitializeComponent(); this.Dock = DockStyle.Fill; } protected override void OnResize(EventArgs e) { base.OnResize(e); // Attempt to force layout update this.Invalidate(); this.Update(); } } ``` The `SplitContainer` is configured with a horizontal orientation and the custom control is added to the `Panel1`. The `SplitContainer` is also set to a minimum size, but it seems to be conflicting with the auto-resizing of the controls within it. When I run the application, I can see that the control appears to resize initially but then snaps back to a smaller size once the layout is finalized. I've also checked the `AutoSize` and `AutoSizeMode` properties, but they don’t seem to impact the resizing behavior of the control. The application runs on .NET Framework 4.8. Any insights or suggestions on what might be causing this behavior would be greatly appreciated!