protected void btnNext_Click(object sender, EventArgs e)//查看下一张
{
int i = currentIndex;
SetIndex((i+1)%5);
this.Image1.ImageUrl = shanImage[i]; //设置显示图片
this.lblName.Text = shanName[i]; //显示旅游景点名称
}
protected void btnLast_Click(object sender, EventArgs e)//查看上一张
{
int i = currentIndex;
SetIndex((i + 4) % 5);
this.Image1.ImageUrl = shanImage[i]; //设置显示图片
this.lblName.Text = shanName[i]; //显示旅游景点名称
}
private static void SetIndex(int i) //设置当前索引
{
currentIndex = i;
}
里面的SetIndex((i + 4) % 5);是什么意思啊,看不懂,文件夹总共有5张图片