WinForms: Issue with Custom Control Redrawing After Dynamic Size Change
I'm performance testing and This might be a silly question, but I'm not sure how to approach After trying multiple solutions online, I still can't figure this out... I'm experiencing issues with a custom control in my WinForms application. The control is supposed to dynamically resize based on the content it displays, but after changing the size, it fails to redraw correctly. I’m using .NET Framework 4.8 and Visual Studio 2019. Here’s the code snippet for my custom control: ```csharp public class ResizableControl : Control { private string displayText; public string DisplayText { get => displayText; set { displayText = value; this.Invalidate(); // Request a redraw } } protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); e.Graphics.DrawString(displayText, this.Font, Brushes.Black, new PointF(0, 0)); } protected override void OnResize(EventArgs e) { base.OnResize(e); // Possibly adjust layout or trigger a redraw this.Invalidate(); } } ``` I use this control in a `Form` as follows: ```csharp private void MyForm_Load(object sender, EventArgs e) { var resizableControl = new ResizableControl { DisplayText = "Initial Text", Width = 100, Height = 50 }; this.Controls.Add(resizableControl); } private void ResizeButton_Click(object sender, EventArgs e) { var control = this.Controls.OfType<ResizableControl>().FirstOrDefault(); if (control != null) { control.Width = 200; // Changing size dynamically control.DisplayText = "Updated Text"; } } ``` After resizing, the text does not update visually even though the `DisplayText` property is set. I’ve tried calling `Invalidate()` in multiple places, including the resize event, but the control still doesn't reflect the new size or text until I manually resize the window. I also verified that `OnPaint` is being triggered, but the drawing does not reflect the updated width or text. Any ideas on what I might be missing or how to force a proper redraw? I suspect it may have something to do with how WinForms handles layout invalidation. Could it be related to the graphics state or caching? Any insights would be greatly appreciated! This is part of a larger service I'm building. Thanks in advance! I'm working in a Ubuntu 20.04 environment. Thanks for any help you can provide! I recently upgraded to Csharp 3.11. Could this be a known issue?