大家都搜：
自动回发
1、Registers client script for generating postback events prior to rendering on the client, if AutoPostBack is true.───如果AutoPostBack是true，则在客户端上呈现之前注册用于生成回发事件的客户端脚本。
2、Control is set to perform autopostback, the page is submitted as soon as a user selects an item from the list.───控件被设置为执行自动回发，则一旦用户从列表中选择了一项后，该页就会被提交。
3、control's SelectedIndex event is called automatically (the AutoPostBack property of control is set to True) when a user selects a value from the list.───用户从列表中选择一个值时，自动调用控件的SelectedIndex事件(控件的AutoPostBack属性设置为True)。
4、To have the CheckedChanged event cause an immediate posting, set the CheckBox control's AutoPostBack property to true.───若要使CheckedChanged事件引发即时发送，请将CheckBox控件的AutoPostBack属性设置为true。