【C#】Winform界面防止闪烁

1. Form界面

protected override CreateParams CreateParams  
{
    get
    {
        CreateParams cp = base.CreateParams;
        cp.ExStyle |= 0x02000000;  // Turn on WS_EX_COMPOSITED
        if (this.IsXpOr2003 == true)
            {
            cp.ExStyle |= 0x00080000;  // Turn on WS_EX_LAYERED
            this.Opacity = 1;
            }
        return cp;
    }
}  //防止闪烁  

private Boolean IsXpOr2003
{  
    get
    {
        OperatingSystem os = Environment.OSVersion; 
        Version vs = os.Version;
        if (os.Platform == PlatformID.Win32NT)
            if ((vs.Major == 5) && (vs.Minor != 0)) 
                return true;
            else
                return false;
        else
            return false;
    }
}

2. UserControls界面

public class NoFlickerUserControl : UserControl
{
    public NoFlickerUserControl()
    {
        this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
        this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
        this.SetStyle(ControlStyles.UserPaint, true);
        this.UpdateStyles();
    }

    protected override void OnHandleCreated(EventArgs e)
    {
        base.OnHandleCreated(e);
        if (IsXpOr2003)
        {
            // 请注意，Opacity不适用于UserControl，这里不需要处理  
            int exStyle = NativeMethods.GetWindowLong(this.Handle, NativeMethods.GWL_EXSTYLE);
            exStyle |= 0x02000000; // WS_EX_COMPOSITED  
            NativeMethods.SetWindowLong(this.Handle, NativeMethods.GWL_EXSTYLE, exStyle);
        }
    }

    private bool IsXpOr2003
    {
        get
        {
            OperatingSystem os = Environment.OSVersion;
            Version vs = os.Version;
            return os.Platform == PlatformID.Win32NT && (vs.Major == 5 && vs.Minor != 0);
        }
    }

    private static class NativeMethods
    {
        public const int GWL_EXSTYLE = -20;

        [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
        public static extern int GetWindowLong(IntPtr hWnd, int nIndex);

        [System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
        public static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
    }
}

3. UserControls界面-新写法

public class NoFlickerUserControl : UserControl
{
    public NoFlickerUserControl()
    {
        SetStyle(ControlStyles.OptimizedDoubleBuffer |
                 ControlStyles.AllPaintingInWmPaint |
                 ControlStyles.UserPaint, true);
        UpdateStyles();
    }

    protected override CreateParams CreateParams
    {
        get
        {
            CreateParams cp = base.CreateParams;
            cp.ExStyle |= 0x02000000; // WS_EX_COMPOSITED
            return cp;
        }
    }
}

 

时间：2025年3月14日