//水平百叶窗
public void Effect_BaiYeH(Bitmap obmp, Bitmap bmp, PictureBox pic)
{
	int step = 30;
	try
	{
		Bitmap bmp1 = (Bitmap)bmp.Clone();
		int height = bmp1.Height / step;
		int width = bmp1.Width;
		Graphics g = Graphics.FromImage(obmp);
		Point[] MyPoint = new Point[step];
		for (int y = 0; y < step; y++)
		{
			MyPoint[y].X = 0;
			MyPoint[y].Y = y * height;
		}
		Bitmap bitmap = new Bitmap(bmp.Width, bmp.Height);
		for (int i = 0; i < height; i++)
		{
			for (int j = 0; j < step; j++)
			{
				for (int k = 0; k < width; k++)
				{
					bitmap.SetPixel(MyPoint[j].X + k, MyPoint[j].Y + i, bmp.GetPixel(MyPoint[j].X + k, MyPoint[j].Y + i));
				}
			}
			pic.Refresh();
			pic.Image = bitmap;

			System.Threading.Thread.Sleep(20);
		}
		g.Dispose();
		bmp1.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}

}

//垂直百叶窗
public void Effect_BaiYeV(Bitmap obmp, Bitmap bmp, PictureBox pic)
{ 
	int step = 50;
	try
	{
		Bitmap bmp1 = (Bitmap)bmp.Clone();
		int dw = bmp1.Width / step;
		int dh = bmp1.Height;
		Graphics g = Graphics.FromImage(obmp);
		Point[] MyPoint = new Point[step];
		for (int x = 0; x < step; x++)
		{
			MyPoint[x].Y = 0;
			MyPoint[x].X = x * dw;
		}
		Bitmap bitmap = new Bitmap(bmp1.Width, bmp1.Height);
		for (int i = 0; i < dw; i++)
		{
			for (int j = 0; j < step; j++)
			{
				for (int k = 0; k < dh; k++)
				{
					bitmap.SetPixel(MyPoint[j].X + i, MyPoint[j].Y + k, bmp1.GetPixel(MyPoint[j].X + i, MyPoint[j].Y + k));
				}
			}
			pic.Refresh();
			pic.Image = bitmap;

			System.Threading.Thread.Sleep(20);
		}
		g.Dispose();
		bmp1.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}
}

//从上向下
public void Effect_U2D(Bitmap obmp, Bitmap bmp, PictureBox pic)
{
	try
	{
		int width = bmp.Width; 
		int height = bmp.Height; 

		Graphics g = pic.CreateGraphics();
		g.DrawImage(obmp, 0, 0, width, height);
		for (int y = 1; y <= height; y += 40)
		{
			Bitmap bitmap = bmp.Clone(new Rectangle(0, 0, width, y), System.Drawing.Imaging.PixelFormat.Format24bppRgb);
			g.DrawImage(bitmap, 0, 0);
			System.Threading.Thread.Sleep(100);
		}
		g.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}
}
//从下向上
public void Effect_D2U(Bitmap obmp, Bitmap bmp, PictureBox pic)
{
	try
	{
		int width = bmp.Width;
		int height = bmp.Height;

		Graphics g = pic.CreateGraphics();
		g.DrawImage(obmp, 0, 0, width, height);

		for (int y = 1; y <= height; y += 40)
		{
			Bitmap bitmap = bmp.Clone(new Rectangle(0, height - y, width, y), System.Drawing.Imaging.PixelFormat.Format24bppRgb);
			g.DrawImage(bitmap, 0, height - y);
			System.Threading.Thread.Sleep(100);
		}
		g.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}
}

//从左向右
public void Effect_L2R(Bitmap obmp, Bitmap bmp, PictureBox pic)
{
	try
	{
		int width = bmp.Width; 
		int height = bmp.Height; 
		Graphics g = pic.CreateGraphics();
		g.DrawImage(obmp, 0, 0, width, height);
		for (int x = 1; x <= width; x += 50)
		{
			Bitmap bitmap = bmp.Clone(new Rectangle(0, 0, x, height), System.Drawing.Imaging.PixelFormat.Format24bppRgb);
			g.DrawImage(bitmap, 0, 0);
			System.Threading.Thread.Sleep(100);
		}
		g.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}
}

//从右向左
public void Effect_R2L(Bitmap obmp, Bitmap bmp, PictureBox pic)
{
	try
	{
		int width = bmp.Width;
		int height = bmp.Height;
		Graphics g = pic.CreateGraphics();
		g.DrawImage(obmp, 0, 0, width, height);
		for (int x = 1; x <= width; x += 50)
		{
			//----------------------------------------------w, 0,  0,  h  ||  w-x, 0, +x, h 
			Bitmap bitmap = bmp.Clone(new Rectangle(width - x, 0, x, height), System.Drawing.Imaging.PixelFormat.Format24bppRgb);
			g.DrawImage(bitmap, width - x, 0);
			System.Threading.Thread.Sleep(100);
		}
		g.Dispose();
	}
	catch (Exception ex)
	{
		MessageBox.Show(ex.Message, "错误");
	}
}

  作者:  一个吃货帅锅