What are the reasons for a WinForms window blinking and…

There can be various reasons why a WinForm window flickers, including but not limited to the following reasons:

1. Redraw issue during the drawing process: The window may flicker due to frequent redraws, such as drawing graphics and controls on the window.
2. Controls flicker: Some controls may flicker when their status changes, such as when a button’s state changes.

Depending on the specific situation, you can choose one of the following methods to solve the problem.

1. Double buffering drawing: Using double buffering technology can reduce flickering in the window drawing process. In the constructor of the window, set SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true), and also add e.Graphics.Clear(Color.Transparent); in the OnPaintBackground and OnPaint methods.
2. Utilize SuspendLayout and ResumeLayout: When performing layout operations on a large number of controls, you can use the SuspendLayout and ResumeLayout methods to pause and resume layout logic, preventing frequent flickering.
3. Enable double buffering for controls that require frequent updates by setting their DoubleBuffered property to true.
4. Reduce the frequency of control redraws: You can decrease the number of redraws by adjusting the properties of the control or the frequency of events triggered.
5. Using animation effects: to reduce flicker in the dynamic effects of the form, techniques such as double buffering and transparent drawing can be used.

It is necessary to choose the appropriate solution based on the specific situation in order to reduce or eliminate the flickering issue on WinForm windows.