Graphics.Clear winform 画图闪烁

[antcy_18]

public static void FanZhuan_ZuoYou(Bitmap MyBitmap, Control picBox)
        {
            //以左右反转方式显示图像 
            try
            {
                int width = MyBitmap.Width; //图像宽度 
                int height = MyBitmap.Height; //图像高度 
                Graphics g = picBox.CreateGraphics();
            
                int ia = 0;
                for (int j = -height / 2; j <= height / 2; j++)
                {
                    ia++;
                    g.Clear(Color.White);
                    int i = Convert.ToInt32(j * (Convert.ToSingle(width) / Convert.ToSingle(height)));
                    Rectangle DestRect = new Rectangle(width / 2 - i, 0, 2 * i, height);
                    Rectangle SrcRect = new Rectangle(0, 0, MyBitmap.Width, MyBitmap.Height);
                    g.DrawImage(MyBitmap, DestRect, SrcRect, GraphicsUnit.Pixel);
                    System.Threading.Thread.Sleep(10);
                }
                Console.WriteLine(ia);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "信息提示");
            }
        }public static void FanZhuan_ZuoYou(Bitmap MyBitmap, Control picBox)
        {
            //以左右反转方式显示图像 
            try
            {
                int width = MyBitmap.Width; //图像宽度 
                int height = MyBitmap.Height; //图像高度 
                Graphics g = picBox.CreateGraphics();
            
                int ia = 0;
                for (int j = -height / 2; j <= height / 2; j++)
                {
                    ia++;
                    g.Clear(Color.White);
                    int i = Convert.ToInt32(j * (Convert.ToSingle(width) / Convert.ToSingle(height)));
                    Rectangle DestRect = new Rectangle(width / 2 - i, 0, 2 * i, height);
                    Rectangle SrcRect = new Rectangle(0, 0, MyBitmap.Width, MyBitmap.Height);
                    g.DrawImage(MyBitmap, DestRect, SrcRect, GraphicsUnit.Pixel);
                    System.Threading.Thread.Sleep(10);
                }
                Console.WriteLine(ia);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "信息提示");
            }
        }

从网上拿的翻转图片的函数， 发现闪烁的很厉害。

this.SetStyle(
System.Windows.Forms.ControlStyles.UserPaint |
System.Windows.Forms.ControlStyles.AllPaintingInWmPaint |
System.Windows.Forms.ControlStyles.OptimizedDoubleBuffer,
true); 这双缓冲，也用了， 没效果。

[threenewbee]

画到内存中的位图对象，然后再设置给控件的bavkgroundimage属性。

[智商余额不足]

public static void FanZhuan_ZuoYou(Bitmap MyBitmap, Control picBox)
{
    //以左右反转方式显示图像 
    try
    {
        int width = MyBitmap.Width; //图像宽度 
        int height = MyBitmap.Height; //图像高度 
        Graphics g = picBox.CreateGraphics();
        BufferedGraphics bufferGfx = BufferedGraphicsManager.Current.Allocate(g, picBox.ClientRectangle);
        Graphics gfx = bufferGfx.Graphics;

        int ia = 0;
        for (int j = -height / 2; j <= height / 2; j++)
        {
            ia++;
            gfx.Clear(Color.White);
            int i = Convert.ToInt32(j * (Convert.ToSingle(width) / Convert.ToSingle(height)));
            Rectangle DestRect = new Rectangle(width / 2 - i, 0, 2 * i, height);
            Rectangle SrcRect = new Rectangle(0, 0, MyBitmap.Width, MyBitmap.Height);
            gfx.DrawImage(MyBitmap, DestRect, SrcRect, GraphicsUnit.Pixel);
            bufferGfx.Render(g);
            System.Threading.Thread.Sleep(10);
        }

        gfx.Dispose();
        bufferGfx.Dispose();

        Console.WriteLine(ia);
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "信息提示");
    }
}