我想学习，在asp.net， 我们如何能够理解的是那里的网页编程？

I want to learn that in asp.net, how can we understand is there any listbox control on the page programmatically?

推荐答案

您可以尝试像...

if (Page.Controls.OfType<ListBox>().Count() > 0)
   {
       Response.Write("Listbox control exist");
   }