我在写一个程序，用timer控件每隔三十秒从外部读入一张图片到picturebox中去，哪位大虾知道从外部读入图片到picturebox中的过程的代码怎么写？拜谢~~~~

picturebox.imagelocation=图片路径

       int time = 0;
        private void timer1_Tick(object sender, EventArgs e)
        {
            time++;
            if (time % 300 ==0)
            pictureBox1.image = 路劲;
        }