WPF 实例化窗体退出程序后进程依然存在

晚安苏州 2017-10-24 03:21:09

举个例子：
主窗体中放一个按钮：



<Window x:Class="WpfApplication3.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

        xmlns:local="clr-namespace:WpfApplication3"

        mc:Ignorable="d"

        Title="MainWindow" Height="350" Width="525">

    <Grid>

        <Button x:Name="button" Content="Button" HorizontalAlignment="Left" Margin="221,139,0,0" VerticalAlignment="Top" Width="75" Click="button_Click" />

    </Grid>

</Window>



        private void button_Click(object sender, RoutedEventArgs e)

        {

            TestWindow testWindow = new TestWindow();

        }

TestWindow只是一个空窗体：



<Window x:Class="WpfApplication3.TestWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

        xmlns:local="clr-namespace:WpfApplication3"

        mc:Ignorable="d"

        Title="TestWindow" Height="300" Width="300">

    <Grid>

        

    </Grid>

</Window>

点一下按钮，然后关闭程序，在任务管理器中，程序依然无法退出！如果变成;



        private void button_Click(object sender, RoutedEventArgs e)

        {

            TestWindow testWindow = new TestWindow();

            testWindow.ShowDialog();

        }

就没问题，程序进程顺利退出，求大神指点迷津

...全文

2140 6 打赏收藏转发到动态举报

写回复

用AI写文章

6 条回复

切换为时间正序

请发表友善的回复…

发表回复

晚安苏州 2017-10-25

打赏
举报

引用 5 楼 sudazf 的回复:

[quote=引用 4 楼 duanzi_peng 的回复:] [quote=引用 2 楼 duanzi_peng 的回复:] 点一下按钮 -》点击的什么关闭按钮？

是主窗口上的关闭按钮吧？你在app.xaml中设置属性ShutdownMode为OnMainWindowClose。意思就是主窗口退出，则整个Application退出。Application退出进程就结束了，就会释放进程中的所有资源。[/quote] 原来可以这样，刚刚试了一下，是可以的！[/quote] 补充一下加上这句也是可以的：


testWindow.Owner = System.Windows.Application.Current.MainWindow;

因为： • When a child window is opened by a parent window by calling ShowDialog, an implicit relationship is established between both parent and child window. • When a child window is created by a parent window by calling Show, however, the child window does not have a relationship with the parent window. • To allow you to create a relationship between a child window and a parent window, Window supports the notion of ownership. Ownership is established when the Owner property of a window (the owned window) is set with a reference to another window (the owner window). • If you close an owner window, its owned windows are also closed.

晚安苏州 2017-10-24