您提到不使用随机的一组图片的网站。他们是coded到aspx页面的HTML端。

The site you mentioned is not using a random set of images. They are coded into the html side of the aspx page.

您可以将网页上的ASP Image控件。然后在该页面的Page_Load中函数图像设置为您一套随机的图片。

You could place an asp Image control on your page. Then on the page's Page_Load function set the image to a random picture of your set.

protected void Page_Load(object sender, EventArgs e)
        {

            this.Image1.ImageUrl = "~/images/random3.jpg";
        }

您在哪里存储图像数据集不同的选择。你可以使用一个数据库和网址存储在表中。这将允许使用内置的随机在SQL中的函数。或者你也可以保存一个XML文件到服务器，加载然后用随机.NET类来接你的XML节点之一。

You have different options on where to store the image set data. You could use a database and store the urls in a table. This would allow to use the built-in Random function found in SQL. Or you can save a XML file to the server, load that then use the Random .Net class to pick one of your xml nodes.

我个人建议的数据库解决方案。

Personally i would recommend the Database solution.

编辑：由于服务器会话20分钟后销毁你可能想看看使用cookie，所以你可以看到他们最后看到的随机图像

Because the server session is destroyed after 20mins you may want to look at using cookies so you can see the last random image they saw.