WPF窗口关闭事件用法 [英] WPF Window Closed Event Usage

问题描述

我有一个窗口类（如公共部分类Foo：窗口），当我创建窗口我报名参加关闭事件本身。

I have a Window class (e.g. public partial class Foo : Window), and when I create the window I sign up for the Closed event as such.

foo = new Foo();
foo.Closed += FooClosed;


public void FooClosed(object sender, System.EventArgs e)
{
}

当有人按下富窗口我称之为内按钮 this.Close（），但我的 FooClosed 似乎并没有被调用。

When someone presses a button inside the foo Window I call this.Close() but my FooClosed doesn't seem to be called.

我是不正确的报名参加事件？

Am I incorrectly signing up for the event?

更新

顺便说一句，所有我想要做到的是的知道的当富已经关闭，所以我可以设置参考回空。有没有更好的方式来实现这一目标。

By the way, all I'm trying to accomplish is know when foo has been closed so I can set the reference back to null. Is there a better way to accomplish that?

推荐答案

问题得到回答，前几天检查的Execute代码

Question was answered a few days ago check Execute code when a WPF closes

你可能有一些事情与你的代码，因为这工作就好了我。

You may have something going on with your code because this works just fine for me.

MainWindow.xaml.cs

MainWindow.xaml.cs

namespace WpfApplication1
{

    public partial class MainWindow : Window
    {
        private Foo foo;

        public MainWindow()
        {
            InitializeComponent();

            foo = new Foo();
            foo.Closed += FooClosed;
            foo.Show();
        }

        public void FooClosed(object sender, System.EventArgs e)
        {
            //This gets fired off
            foo = null;
        }

    }
}

富。 XAML

Foo.xaml

<Window x:Class="WpfApplication1.Foo"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Foo" Height="300" Width="300">
    <Grid>
        <Button Click="Button_Click">Close</Button>
    </Grid>
</Window>

Foo.xaml.cs

Foo.xaml.cs

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Foo.xaml
    /// </summary>
    public partial class Foo : Window
    {
        public Foo()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }
}

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