Async
代码说明：
在ASP。 网络使我们能够从服务器获取信息而不刷新整个页面。这可以很方便当你有大,图形密集型、页面或如果服务器端验证需要一场提交之前,整个页面。注意,在我的例子说明模型的下拉列表中重新每次选择的项列表开始改变了。为国家的信息将从服务器列表,选中项的状态列表是改变。为该地区的信息列表将从服务器但注意,列表是唯一一项页面刷新。其余的页面内容是保留在原处,结果在一个更流畅的用户体验。也快于刷新整个页面,只有信息列表发送回客户端,而不是整个页面。(In ASP. Network enables us to get information from the server without refreshing the entire page. This can be very handy when you have a large, graphics-intensive, page, or if you need a server-side validation before submitting the entire page. Note that in my example illustrates the model dropdown list of items each selection again began to change. For the country' s information from the server list, select the item status list is changed. List of information in the region from the server but note that the list is the only one page refresh. The rest of the page content is left in place, resulting in a smoother user experience. Is also faster than refreshing the entire page, only information list is sent back to the client, rather than the entire page.)
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