分别双击窗体和picturebox,加入代码
Boolean index = false;
private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.Image = imageList1.Images[0];
}
private void pictureBox1_Click(object sender, EventArgs e)
{
index=!index;
pictureBox1.Image = imageList1.Images[(index?1:0)];
}
,用这个的话,有几张图片都无所谓,会一直循环显示