.net c# winform百叶窗效果代码

1.放一个panel,设置panel的背景图.

2.对背景图进行处理.

        private void zbtnsubmit_Click(object sender, EventArgs e)
        {
            try
            {
                Bitmap oldmap = (Bitmap)this.zpal.BackgroundImage.Clone();
                int intWidth = oldmap.Width;
                int intHeight = oldmap.Height / 20;
                Graphics myGraphics = this.zpal.CreateGraphics();
                myGraphics.Clear(Color.WhiteSmoke);
                Point[] myPoint = new Point[30];
                for (int i = 0; i < 30; i++)
                {
                    myPoint[i].X = 0;
                    myPoint[i].Y = i * intHeight;
                }
                Bitmap bitmap = new Bitmap(oldmap.Width, oldmap.Height);
                for (int m = 0; m < intHeight; m++)
                {
                    for (int n = 0; n < 20; n++)
                    {
                        for (int j = 0; j < intWidth; j++)
                        {
                            bitmap.SetPixel(myPoint[n].X + j, myPoint[n].Y + m, oldmap.GetPixel(myPoint[n].X + j, myPoint[n].Y + m));
                        }
                    }
                    this.zpal.Refresh();
                    this.zpal.BackgroundImage = bitmap;
                    System.Threading.Thread.Sleep(100);
                }
            }
            catch { }
        }

实现百叶窗类似效果