Application.Exit Application.Exit Application.Exit Application.Exit Event

Definition

Tritt kurz vor dem Herunterfahren einer Anwendung auf und kann nicht abgebrochen werden.Occurs just before an application shuts down, and cannot be canceled.

public:
 event System::Windows::ExitEventHandler ^ Exit;
public event System.Windows.ExitEventHandler Exit;
member this.Exit : System.Windows.ExitEventHandler 
Public Custom Event Exit As ExitEventHandler 

Beispiele

Im folgende Beispiel wird veranschaulicht, wie Sie:The following example demonstrates how to:

  • Behandeln der Exit Ereignis.Handle the Exit event.

  • Untersuchen und Aktualisieren der ApplicationExitCode Eigenschaft der ExitEventArgs.Inspect and update the ApplicationExitCode property of the ExitEventArgs.

  • Schreiben eines Eintrags in einem Anwendungsprotokoll in einem isolierten Speicher.Write an entry to an application log in isolated storage.

  • Speichern Sie den Zustand der Anwendung in den isolierten Speicher.Persist the application state to isolated storage.

<Application x:Class="CSharp.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>
using System;
using System.Collections;
using System.Windows;
using System.IO;
using System.IO.IsolatedStorage;

namespace CSharp
{
    public enum ApplicationExitCode
    {
        Success = 0,
        Failure = 1,
        CantWriteToApplicationLog = 2,
        CantPersistApplicationState = 3
    }

    public partial class App : Application
    {
        void App_Exit(object sender, ExitEventArgs e)
        {
            try
            {
                // Write entry to application log
                if (e.ApplicationExitCode == (int)ApplicationExitCode.Success)
                {
                    WriteApplicationLogEntry("Failure", e.ApplicationExitCode);
                }
                else
                {
                    WriteApplicationLogEntry("Success", e.ApplicationExitCode);
                }
            }
            catch
            {
                // Update exit code to reflect failure to write to application log
                e.ApplicationExitCode = (int)ApplicationExitCode.CantWriteToApplicationLog;
            }

            // Persist application state
            try
            {
                PersistApplicationState();
            }
            catch
            {
                // Update exit code to reflect failure to persist application state
                e.ApplicationExitCode = (int)ApplicationExitCode.CantPersistApplicationState;
            }
        }

        void WriteApplicationLogEntry(string message, int exitCode)
        {
            // Write log entry to file in isolated storage for the user
            IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForAssembly();
            using (Stream stream = new IsolatedStorageFileStream("log.txt", FileMode.Append, FileAccess.Write, store))
            using (StreamWriter writer = new StreamWriter(stream))
            {
                string entry = string.Format("{0}: {1} - {2}", message, exitCode, DateTime.Now);
                writer.WriteLine(entry);
            }
        }

        void PersistApplicationState()
        {
            // Persist application state to file in isolated storage for the user
            IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForAssembly();
            using (Stream stream = new IsolatedStorageFileStream("state.txt", FileMode.Create, store))
            using (StreamWriter writer = new StreamWriter(stream))
            {
                foreach (DictionaryEntry entry in this.Properties)
                {
                    writer.WriteLine(entry.Value);
                }
            }
        }
    }
}

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Windows
Imports System.IO
Imports System.IO.IsolatedStorage

Namespace VisualBasic
    Public Enum ApplicationExitCode
        Success = 0
        Failure = 1
        CantWriteToApplicationLog = 2
        CantPersistApplicationState = 3
    End Enum

    Partial Public Class App
        Inherits Application
        Private Sub App_Exit(ByVal sender As Object, ByVal e As ExitEventArgs)
            Try
                ' Write entry to application log
                If e.ApplicationExitCode = CInt(ApplicationExitCode.Success) Then
                    WriteApplicationLogEntry("Failure", e.ApplicationExitCode)
                Else
                    WriteApplicationLogEntry("Success", e.ApplicationExitCode)
                End If
            Catch
                ' Update exit code to reflect failure to write to application log
                e.ApplicationExitCode = CInt(ApplicationExitCode.CantWriteToApplicationLog)
            End Try

            ' Persist application state
            Try
                PersistApplicationState()
            Catch
                ' Update exit code to reflect failure to persist application state
                e.ApplicationExitCode = CInt(ApplicationExitCode.CantPersistApplicationState)
            End Try
        End Sub

        Private Sub WriteApplicationLogEntry(ByVal message As String, ByVal exitCode As Integer)
            ' Write log entry to file in isolated storage for the user
            Dim store As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForAssembly()
            Using stream As Stream = New IsolatedStorageFileStream("log.txt", FileMode.Append, FileAccess.Write, store)
                Using writer As New StreamWriter(stream)
                    Dim entry As String = String.Format("{0}: {1} - {2}", message, exitCode, Date.Now)
                    writer.WriteLine(entry)
                End Using
            End Using
        End Sub

        Private Sub PersistApplicationState()
            ' Persist application state to file in isolated storage for the user
            Dim store As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForAssembly()
            Using stream As Stream = New IsolatedStorageFileStream("state.txt", FileMode.Create, store)
                Using writer As New StreamWriter(stream)
                    For Each entry As DictionaryEntry In Me.Properties
                        writer.WriteLine(entry.Value)
                    Next entry
                End Using
            End Using
        End Sub
    End Class
End Namespace

Hinweise

Eine Anwendung kann für eine der folgenden Gründe heruntergefahren:An application can shut down for either of the following reasons:

  • Die Shutdown Methode der Application Objekt aufgerufen wird, entweder explizit oder wie festgelegt durch die ShutdownMode Eigenschaft.The Shutdown method of the Application object is called, either explicitly or as determined by the ShutdownMode property.

  • Der Benutzer beendet die Sitzung durch abmelden oder Herunterfahren.The user ends the session by logging off or shutting down.

Sie können erkennen, bei Beenden der Anwendung durch Behandeln der Exit -Ereignis, und führen Sie eine zusätzliche Verarbeitung nach Bedarf.You can detect when application shutdown occurs by handling the Exit event, and perform any additional processing as required.

Sie können auch behandeln Exit zu überprüfen oder ändern Exitcode der Anwendung aus, wenn Sie nicht aufrufen müssen Shutdown explizit.You can also handle Exit to inspect or change the application exit code when you don't need to call Shutdown explicitly. Der Exitcode wird verfügbar gemacht, von der ApplicationExitCode Eigenschaft der ExitEventArgs Argument, das an die Exit -Ereignishandler.The exit code is exposed from the ApplicationExitCode property of the ExitEventArgs argument that's passed to the Exit event handler. Wenn die Anwendung wird beendet, wird der Exitcode an das Betriebssystem zur weiteren Verarbeitung übergeben.When the application stops running, the exit code is passed to the operating system for subsequent processing.

Wenn Ihre Anwendung die SessionEnding Ereignis und anschließend abbricht, Exit wird nicht ausgelöst, und die Anwendung wird weiter ausgeführt, die in Übereinstimmung mit dem Modus für das Herunterfahren.If your application handles the SessionEnding event and subsequently cancels it, Exit is not raised and the application continues running in accordance with the shutdown mode.

Der Exitcode kann festgelegt werden, von einem XAML-Browseranwendung (XBAP)XAML browser application (XBAP), obwohl der Wert ignoriert wird.The exit code can be set from an XAML-Browseranwendung (XBAP)XAML browser application (XBAP), although the value is ignored.

Für XBAPsXBAPs, Exit wird in den folgenden Umständen ausgelöst:For XBAPsXBAPs, Exit is raised in the following circumstances:

  • Ein XBAPXBAP weg navigiert wird.An XBAPXBAP is navigated away from.

  • In Internet Explorer 7Internet Explorer 7, wenn die Registerkarte, die hostet die XBAPXBAP geschlossen wird.In Internet Explorer 7Internet Explorer 7, when the tab that is hosting the XBAPXBAP is closed.

  • Wenn der Browser geschlossen wird.When the browser is closed.

In allen Fällen den Wert des der ApplicationExitCode Eigenschaft wird ignoriert.In all cases, the value of the ApplicationExitCode property is ignored.

Gilt für:

Siehe auch