澄清事件 [英] Clarification of events

问题描述

在这种情况下，我们必须使用selected index changing，selected index changed event.

谁能澄清我的疑问.

In which situation we have to use selected index changing, selected index changed event.

Can anyone clarify my doubt.

推荐答案

只需以GridView为例并尝试理解以下内容:
当单击一行的选择"按钮时，但在GridView控件处理选择操作之前，将引发SelectedIndexChanging 事件.这样，您就可以提供一个事件处理方法，该方法将在发生此事件时执行自定义例程，例如取消选择操作.

当单击一行的选择"按钮时，但在GridView控件处理选择操作之后，将引发SelectedIndexChanged 事件.这样，您便可以提供一种事件处理方法，该方法可以在发生此事件时执行自定义例程，例如使用当前选定的行更新状态标签.



--Amit

Hi,

Just take the example of GridView and try to understand this:
The SelectedIndexChanging event is raised when a row''s Select button is clicked, but before the GridView control handles the select operation. This allows you to provide an event-handling method that performs a custom routine, such as canceling the selection operation, whenever this event occurs.

The SelectedIndexChanged event is raised when a row''s Select button is clicked, but after the GridView control handles the select operation. This enables you to provide an event-handling method that performs a custom routine, such as updating a status label with the currently selected row, whenever this event occurs.



--Amit

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