如何使用Application.Exit事件在WPF？ [英] How to use Application.Exit Event in WPF?

问题描述

我需要删除一些特定的文件，那么用户在WPF关闭程序。所以，我想MDSN code从这里<一个href=\"http://msdn.microsoft.com/en-us/library/system.windows.application.exit.aspx\">http://msdn.microsoft.com/en-us/library/system.windows.application.exit.aspx是这样的：

I need to delete some certain files, then user closes program in WPF. So I tried MDSN code from here http://msdn.microsoft.com/en-us/library/system.windows.application.exit.aspx this way:

这code设在这里 App.xml.cs

public partial class App : Application
{
 void App_Exit(object sender, ExitEventArgs e)
    {
       MessageBox.Show("File deleted");
        var systemPath = System.Environment.GetFolderPath(
                                  Environment.SpecialFolder.CommonApplicationData);

                var _directoryName1 = Path.Combine(systemPath, "RadiolocationQ");
                var temp_file = Path.Combine(_directoryName1, "temp.ini");

                if (File.Exists(temp1_file))
                {
                    File.Delete(temp1_file);
                }

    }

}

// App.xaml
<Application x:Class="ModernUIApp1.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml"
             ShutdownMode="OnExplicitShutdown"
             Exit="App_Exit">
    <Application.Resources>

一切不删档的第一，其次该程序保持在这个过程后，我推退出按钮（这真的很奇怪）。这code不给任何错误。最后它不显示的MessageBox 所以，这里有什么问题？

First of all it doesn't delete files, secondly this program stays in the process after I pushed exit button( this is really strange). This code don't give any errors. And finally it doesn't show MessageBox So anything wrong here?

我认为他只是不能老是找这个功能。

I think he just can`t find this function.

推荐答案

这是很简单的：

退出属性添加到应用程序标签

Add "Exit" property to the application tag

<Application x:Class="WpfApplication4.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml"
             Exit="Application_Exit">
</Application>

和处理它的身后code

and handle it in the "code behind"

private void Application_Exit(object sender, ExitEventArgs e)
{
    // Perform tasks at application exit
}

当应用程序被关闭或Windows会话结束退出事件。它是在SessionEnding事​​件之后被解雇。您不能取消退出事件。

The Exit event is fired when the application is shutting down or the Windows session is ending. It is fired after the SessionEnding event. You cannot cancel the Exit event.

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