If the user changes the value in a textbox or switches the selected element in a dropdown list, you can register an event handler and have code execute when the event is raised.

如果用户改变了文本框中的值或切换了下拉列表中的选定元素，您就能够注册一个事件处理程序，引发事件时，执行代码。

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Figure 4 shows the classes and concepts of an event group profile list that contains a list of event group profiles.

图4展示包含一系列事件组概要的事件组概要清单的类和概念。

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Google Calendar also manages a list of people invited to an event through a list of e-mails to which the event details are sent whenever it is updated.

Google Calendar还管理了一张受邀参加事件的人员列表，只要事件有更新就通过这些人员的电子邮件列表发送事件详细信息。

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It maintains a "wait list" if an event sells out.

FORBES

We typically don't announce or provide a list of people who are attending an event.

WHITEHOUSE: The White House

Davos organizer Klaus Schwab, who founded the event in 1971, warned that despite such an influential guest list, the 2008 meeting was unlikely to deliver any short-term solutions.

CNN: Market avalanches hit Davos talks