C#添加图片出现的问题help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

private void timer1_Tick(object sender, EventArgs e)
{

        Random ra = new Random();
        j = ra.Next(1, 10);//生成一个0到10之间的随机数
        pictureBox1.Image = Image.FromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream("Winsdutent.img.stu" + j + ".jpg"));

    }

    private void button1_Click(object sender, EventArgs e)
    {
        timer1.Start();//计时器开始 
    }

    private void button2_Click(object sender, EventArgs e)
    {
        timer1.Stop();//计时器开始
    }![图片说明](https://img-ask.csdn.net/upload/201612/21/1482307297_946229.png)

Assembly.GetExecutingAssembly().GetManifestResourceStream("Winsdutent.img.stu" + j + ".jpg")
这个是null，你的资源名是否正确

添加图片可以用picture属性中的datasource来添加