asp.net中的页面卸载事件

Is it possible to call a write a Page_Unload event in code behind similar to Page_Load event? I wanted to call a method on Page Unload. How do I achieve that?

是否可以在类似于Page_Load事件的代码中调用Page_Unload事件？我想在页面卸载上调用一个方法。我如何实现这一目标？

3 个解决方案

#1

With AutoEventWireup which is turned on by default on a page you can just add methods prepended with **Page_***event* and have ASP.NET connect to the events for you.

使用默认情况下在页面上打开的AutoEventWireup，您可以添加前缀为** Page _ *** event *的方法，并让ASP.NET连接到事件。

In the case of Unload the method signature is:

在卸载的情况下，方法签名是：

protected void Page_Unload(object sender, EventArgs e)

For details see the MSDN article.

有关详细信息，请参阅MSDN文章。

#2

Refer to the ASP.NET page lifecycle to help find the right event to override. It really depends what you want to do. But yes, there is an unload event.

请参阅ASP.NET页面生命周期以帮助查找要覆盖的正确事件。这真的取决于你想做什么。但是，有一个卸载事件。

    protected override void OnUnload(EventArgs e)
    {
        base.OnUnload(e);

        // your code
    }

But just remember (from the above link): During the unload stage, the page and its controls have been rendered, so you cannot make further changes to the response stream. If you attempt to call a method such as the Response.Write method, the page will throw an exception.

但请记住（从上面的链接）：在卸载阶段，页面及其控件已经呈现，因此您无法对响应流进行进一步更改。如果您尝试调用Response.Write方法等方法，该页面将抛出异常。

#3

There is an event Page.Unload. At that moment page is already rendered in HTML and HTML can't be modified. Still, all page objects are available.

有一个事件Page.Unload。此时页面已经以HTML格式呈现，并且无法修改HTML。仍然，所有页面对象都可用。

#1