我使用的WinForms。我有一个图片框在我的形式。当我打开图片框的图片我能够反转的颜色来回上的一个按钮的点击，但我的code是极其缓慢。我怎样才能提高性能。

 私人无效的button1_Click（对象发件人，发送System.EventArgs）
     {
        位图PIC =新位图（PictureBox1.Image）;
        对于（INT Y = 0;（Y
                    ＆其中; =（pic.Height  -  1））; Ÿ++）{
            为（中间体X = 0;（X
                        ＆其中; =（pic.Width  -  1））; X ++）{
                色INV = pic.GetPixel（X，Y）;
                INV = Color.FromArgb（255，（255  -  inv.R），（255  -  inv.G），（255  -  inv.B））;
                pic.SetPixel（X，Y，INV）;
                PictureBox1.Image =知情同意;
            }

        }

    }
 

解决方案

正在设置控件的图片每次换一个像素，它使控制重绘自身。等到你已经完成了图像：

 位图PIC =新位图（PictureBox1.Image）;
为（中间体y = 0的;（γ＆其中; =（pic.Height  -  1））; Y ++）{
    为（中间体X = 0;（X＆其中; =（pic.Width  -  1））; X ++）{
        色INV = pic.GetPixel（X，Y）;
        INV = Color.FromArgb（255，（255  -  inv.R），（255  -  inv.G），（255  -  inv.B））;
        pic.SetPixel（X，Y，INV）;
    }
}
PictureBox1.Image =知情同意;
 

I'm using WinForms. I have a picture-box in my form. When I open a picture in the picture-box I am able to invert the colors back and forth on a click of a button, but my code is extremely slow. How can I increase the performance.

   private void Button1_Click(object sender, System.EventArgs e) 
     {
        Bitmap pic = new Bitmap(PictureBox1.Image);
        for (int y = 0; (y 
                    <= (pic.Height - 1)); y++) {
            for (int x = 0; (x 
                        <= (pic.Width - 1)); x++) {
                Color inv = pic.GetPixel(x, y);
                inv = Color.FromArgb(255, (255 - inv.R), (255 - inv.G), (255 - inv.B));
                pic.SetPixel(x, y, inv);
                PictureBox1.Image = pic;
            }

        }

    }

You are setting the control's picture each time you change a pixel, which causes the control to redraw itself. Wait until you've finished the image:

Bitmap pic = new Bitmap(PictureBox1.Image);
for (int y = 0; (y <= (pic.Height - 1)); y++) {
    for (int x = 0; (x <= (pic.Width - 1)); x++) {
        Color inv = pic.GetPixel(x, y);
        inv = Color.FromArgb(255, (255 - inv.R), (255 - inv.G), (255 - inv.B));
        pic.SetPixel(x, y, inv);
    }
}
PictureBox1.Image = pic;