C#實現淡入淡出顯示圖像效果顯示圖片(2)

private void button3_Click(object sender, EventArgs e)
{
    //淡出顯示圖像
    try
    {
        Graphics g = this.panel1.CreateGraphics();
        g.Clear(Color.Gray);
        int width = MyBitmap.Width;
        int height = MyBitmap.Height;
        ImageAttributes attributes = new ImageAttributes();
        ColorMatrix matrix = new ColorMatrix();
        //創建淡出顏色矩陣
        matrix.Matrix00 = (float)0.0;
        matrix.Matrix01 = (float)0.0;
        matrix.Matrix02 = (float)0.0;
        matrix.Matrix03 = (float)0.0;
        matrix.Matrix04 = (float)0.0;
        matrix.Matrix10 = (float)0.0;
        matrix.Matrix11 = (float)0.0;
        matrix.Matrix12 = (float)0.0;
        matrix.Matrix13 = (float)0.0;
        matrix.Matrix14 = (float)0.0;
        matrix.Matrix20 = (float)0.0;
        matrix.Matrix21 = (float)0.0;
        matrix.Matrix22 = (float)0.0;
        matrix.Matrix23 = (float)0.0;
        matrix.Matrix24 = (float)0.0;
        matrix.Matrix30 = (float)0.0;
        matrix.Matrix31 = (float)0.0;
        matrix.Matrix32 = (float)0.0;
        matrix.Matrix33 = (float)0.0;
        matrix.Matrix34 = (float)0.0;
        matrix.Matrix40 = (float)0.0;
        matrix.Matrix41 = (float)0.0;
        matrix.Matrix42 = (float)0.0;
        matrix.Matrix43 = (float)0.0;
        matrix.Matrix44 = (float)0.0;
        matrix.Matrix33 = (float)1.0;
        matrix.Matrix44 = (float)1.0;
        //從1到0進行修改色彩變換矩陣主對角線上的數值
        //依次減少每種色彩分量
        Single count = (float)1.0;
        while (count > 0.0)
        {
            matrix.Matrix00 = (float)count;
            matrix.Matrix11 = (float)count;
            matrix.Matrix22 = (float)count;
            matrix.Matrix33 = (float)count;
            attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
          g.DrawImage(MyBitmap, new Rectangle(0, 0, width, height), 0, 0, width, height, GraphicsUnit.Pixel, attributes);
            System.Threading.Thread.Sleep(20);
            count = (float)(count - 0.01);
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message, "信息提示");
    }
}