Application.LocalUserAppDataPath Eigenschaft

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Ruft den Pfad für die Anwendungsdaten eines lokalen Benutzers ab, der kein Roaming verwendet.

public:
 static property System::String ^ LocalUserAppDataPath { System::String ^ get(); };

public static string LocalUserAppDataPath { get; }

static member LocalUserAppDataPath : string

Public Shared ReadOnly Property LocalUserAppDataPath As String

Eigenschaftswert

String

Der Pfad für die Anwendungsdaten eines lokalen Benutzers, der kein Roaming verwendet.

Beispiele

Im folgenden Codebeispiel werden zwei Formulare angezeigt und die Anwendung beendet, wenn beide Formulare geschlossen werden. Wenn die Anwendung gestartet und beendet wird, wird die Position jedes Formulars gespeichert. Obwohl in diesem Beispiel die Verwendung der UserAppDataPath -Eigenschaft zum Speichern von Anwendungsdaten für den Benutzer veranschaulicht wird, kann stattdessen LocalUserAppDataPath verwendet werden.

Die MyApplicationContext -Klasse erbt von ApplicationContext und verfolgt, wann jedes Formular geschlossen wird, und beendet den aktuellen Thread, wenn beides ist. Die -Klasse speichert die Positionen jedes Formulars für den Benutzer. Die Formularpositionsdaten werden in einer Datei mit dem Titel Appdata.txt gespeichert, die an dem durch UserAppDataPathfestgelegten Speicherort erstellt wird. Die Main -Methode ruft auf Application.Run(context) , um die Anwendung mit dem zu ApplicationContextstarten.

Dieser Code ist ein Auszug aus dem Beispiel in der ApplicationContext Klassenübersicht. Ein Teil des Codes wird aus Gründen der Kürze nicht angezeigt. Die gesamte Codeauflistung finden Sie ApplicationContext unter.

   MyApplicationContext()
   {
      _formCount = 0;
      
      // Handle the ApplicationExit event to know when the application is exiting.
      Application::ApplicationExit += gcnew EventHandler( this, &MyApplicationContext::OnApplicationExit );
      try
      {
         
         // Create a file that the application will store user specific data in.
         _userData = gcnew FileStream( String::Concat( Application::UserAppDataPath, "\\appdata.txt" ),FileMode::OpenOrCreate );
      }
      catch ( IOException^ e ) 
      {
         
         // Inform the user that an error occurred.
         MessageBox::Show( "An error occurred while attempting to show the application. The error is: {0}", dynamic_cast<String^>(e) );
         
         // Exit the current thread instead of showing the windows.
         ExitThread();
      }

      
      // Create both application forms and handle the Closed event
      // to know when both forms are closed.
      _form1 = gcnew AppForm1;
      _form1->Closed += gcnew EventHandler( this, &MyApplicationContext::OnFormClosed );
      _form1->Closing += gcnew CancelEventHandler( this, &MyApplicationContext::OnFormClosing );
      _formCount++;
      _form2 = gcnew AppForm2;
      _form2->Closed += gcnew EventHandler( this, &MyApplicationContext::OnFormClosed );
      _form2->Closing += gcnew CancelEventHandler( this, &MyApplicationContext::OnFormClosing );
      _formCount++;
      
      // Get the form positions based upon the user specific data.
      if ( ReadFormDataFromFile() )
      {
         
         // If the data was read from the file, set the form
         // positions manually.
         _form1->StartPosition = FormStartPosition::Manual;
         _form2->StartPosition = FormStartPosition::Manual;
         _form1->Bounds = _form1Position;
         _form2->Bounds = _form2Position;
      }

      
      // Show both forms.
      _form1->Show();
      _form2->Show();
   }

   void OnApplicationExit( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      
      // When the application is exiting, write the application data to the
      // user file and close it.
      WriteFormDataToFile();
      try
      {
         
         // Ignore any errors that might occur while closing the file handle.
         _userData->Close();
      }
      catch ( Exception^ ) 
      {
      }

   }

private:

private MyApplicationContext()
{
    _formCount = 0;

    // Handle the ApplicationExit event to know when the application is exiting.
    Application.ApplicationExit += new EventHandler(this.OnApplicationExit);

    try
    {
        // Create a file that the application will store user specific data in.
        _userData = new FileStream(Application.UserAppDataPath + "\\appdata.txt", FileMode.OpenOrCreate);
    }
    catch (IOException e)
    {
        // Inform the user that an error occurred.
        MessageBox.Show("An error occurred while attempting to show the application." +
                        "The error is:" + e.ToString());

        // Exit the current thread instead of showing the windows.
        ExitThread();
    }

    // Create both application forms and handle the Closed event
    // to know when both forms are closed.
    _form1 = new AppForm1();
    _form1.Closed += new EventHandler(OnFormClosed);
    _form1.Closing += new CancelEventHandler(OnFormClosing);
    _formCount++;

    _form2 = new AppForm2();
    _form2.Closed += new EventHandler(OnFormClosed);
    _form2.Closing += new CancelEventHandler(OnFormClosing);
    _formCount++;

    // Get the form positions based upon the user specific data.
    if (ReadFormDataFromFile())
    {
        // If the data was read from the file, set the form
        // positions manually.
        _form1.StartPosition = FormStartPosition.Manual;
        _form2.StartPosition = FormStartPosition.Manual;

        _form1.Bounds = _form1Position;
        _form2.Bounds = _form2Position;
    }

    // Show both forms.
    _form1.Show();
    _form2.Show();
}

private void OnApplicationExit(object sender, EventArgs e)
{
    // When the application is exiting, write the application data to the
    // user file and close it.
    WriteFormDataToFile();

    try
    {
        // Ignore any errors that might occur while closing the file handle.
        _userData.Close();
    }
    catch { }
}

Public Sub New()
    MyBase.New()
    _formCount = 0

    ' Handle the ApplicationExit event to know when the application is exiting.
    AddHandler Application.ApplicationExit, AddressOf OnApplicationExit

    Try
        ' Create a file that the application will store user specific data in.
        _userData = New FileStream(Application.UserAppDataPath + "\appdata.txt", FileMode.OpenOrCreate)

    Catch e As IOException
        ' Inform the user that an error occurred.
        MessageBox.Show("An error occurred while attempting to show the application." +
                        "The error is:" + e.ToString())

        ' Exit the current thread instead of showing the windows.
        ExitThread()
    End Try

    ' Create both application forms and handle the Closed event
    ' to know when both forms are closed.
    _form1 = New AppForm1()
    AddHandler _form1.Closed, AddressOf OnFormClosed
    AddHandler _form1.Closing, AddressOf OnFormClosing
    _formCount = _formCount + 1

    _form2 = New AppForm2()
    AddHandler _form2.Closed, AddressOf OnFormClosed
    AddHandler _form2.Closing, AddressOf OnFormClosing
    _formCount = _formCount + 1

    ' Get the form positions based upon the user specific data.
    If (ReadFormDataFromFile()) Then
        ' If the data was read from the file, set the form
        ' positions manually.
        _form1.StartPosition = FormStartPosition.Manual
        _form2.StartPosition = FormStartPosition.Manual

        _form1.Bounds = _form1Position
        _form2.Bounds = _form2Position
    End If

    ' Show both forms.
    _form1.Show()
    _form2.Show()
End Sub

Private Sub OnApplicationExit(ByVal sender As Object, ByVal e As EventArgs)
    ' When the application is exiting, write the application data to the
    ' user file and close it.
    WriteFormDataToFile()

    Try
        ' Ignore any errors that might occur while closing the file handle.
        _userData.Close()
    Catch
    End Try
End Sub

Hinweise

Ein lokaler Benutzer ist ein Benutzer, dessen Benutzerprofil auf dem System gespeichert ist, auf dem sich der Benutzer angemeldet hat. Wenn kein Pfad vorhanden ist, wird ein Pfad im folgenden Format erstellt:

Basispfad\CompanyName\ProductName\ProductVersion

Ein typischer Basispfad ist C:\Dokumente und Einstellungen\Benutzername\Lokale Einstellungen\Anwendungsdaten. Dieser Pfad unterscheidet sich jedoch, wenn die Windows Forms-Anwendung mithilfe von ClickOnce bereitgestellt wird. ClickOnce erstellt ein eigenes Anwendungsdatenverzeichnis, das von allen anderen Anwendungen isoliert ist. Weitere Informationen finden Sie unter Zugreifen auf lokale und Remotedaten in ClickOnce-Anwendungen.