Vorgehensweise: Löschen von Speichern im isolierten Speicher
Die IsolatedStorageFile -Klasse stellt zwei Methoden zum Löschen von isolierten Speicherdateien zur Verfügung:
Die Instanzmethode Remove() akzeptiert keine Argumente und löscht den Speicher, von dem sie aufgerufen wird. Für diesen Vorgang sind keine Berechtigungen erforderlich. Jeder Code, der auf den Speicher zugreifen kann, kann beliebige oder sogar alle Daten darin löschen.
Die statische Methode Remove(IsolatedStorageScope) akzeptiert den Enumerationswert User als Argument und löscht alle Speicher für den Benutzer, der den Code ausführt. Für diesen Vorgang ist die IsolatedStorageFilePermission -Berechtigung für den AdministerIsolatedStorageByUser -Wert erforderlich.
Beispiel
Im folgenden Codebeispiel wird die Verwendung der statischen und der Instanzmethode Remove veranschaulicht. Die Klasse ruft zwei Speicher ab; einer ist für Benutzer und Assembly und der andere für Benutzer, Domäne und Assembly isoliert. Der für Benutzer, Domäne und Assembly isolierte Speicher wird dann durch Aufrufen der Remove()-Methode der isolierten Speicherdatei isoStore1 gelöscht. Anschließend werden alle verbleibenden Speicher für den Benutzer durch Aufrufen der statischen Methode Remove(IsolatedStorageScope)gelöscht.
using namespace System;
using namespace System::IO::IsolatedStorage;
public ref class DeletingStores
{
public:
static void Main()
{
// Get a new isolated store for this user, domain, and assembly.
// Put the store into an IsolatedStorageFile object.
IsolatedStorageFile^ isoStore1 = IsolatedStorageFile::GetStore(IsolatedStorageScope::User |
IsolatedStorageScope::Domain | IsolatedStorageScope::Assembly, (Type ^)nullptr, (Type ^)nullptr);
Console::WriteLine("A store isolated by user, assembly, and domain has been obtained.");
// Get a new isolated store for user and assembly.
// Put that store into a different IsolatedStorageFile object.
IsolatedStorageFile^ isoStore2 = IsolatedStorageFile::GetStore(IsolatedStorageScope::User |
IsolatedStorageScope::Assembly, (Type ^)nullptr, (Type ^)nullptr);
Console::WriteLine("A store isolated by user and assembly has been obtained.");
// The Remove method deletes a specific store, in this case the
// isoStore1 file.
isoStore1->Remove();
Console::WriteLine("The user, domain, and assembly isolated store has been deleted.");
// This static method deletes all the isolated stores for this user.
IsolatedStorageFile::Remove(IsolatedStorageScope::User);
Console::WriteLine("All isolated stores for this user have been deleted.");
} // End of Main.
};
int main()
{
DeletingStores::Main();
}
using System;
using System.IO.IsolatedStorage;
public class DeletingStores
{
public static void Main()
{
// Get a new isolated store for this user, domain, and assembly.
// Put the store into an IsolatedStorageFile object.
IsolatedStorageFile isoStore1 = IsolatedStorageFile.GetStore(IsolatedStorageScope.User |
IsolatedStorageScope.Domain | IsolatedStorageScope.Assembly, null, null);
Console.WriteLine("A store isolated by user, assembly, and domain has been obtained.");
// Get a new isolated store for user and assembly.
// Put that store into a different IsolatedStorageFile object.
IsolatedStorageFile isoStore2 = IsolatedStorageFile.GetStore(IsolatedStorageScope.User |
IsolatedStorageScope.Assembly, null, null);
Console.WriteLine("A store isolated by user and assembly has been obtained.");
// The Remove method deletes a specific store, in this case the
// isoStore1 file.
isoStore1.Remove();
Console.WriteLine("The user, domain, and assembly isolated store has been deleted.");
// This static method deletes all the isolated stores for this user.
IsolatedStorageFile.Remove(IsolatedStorageScope.User);
Console.WriteLine("All isolated stores for this user have been deleted.");
} // End of Main.
}
Imports System.IO.IsolatedStorage
Public Class DeletingStores
Public Shared Sub Main()
' Get a new isolated store for this user, domain, and assembly.
' Put the store into an IsolatedStorageFile object.
Dim isoStore1 As IsolatedStorageFile = IsolatedStorageFile.GetStore(IsolatedStorageScope.User Or
IsolatedStorageScope.Domain Or IsolatedStorageScope.Assembly, Nothing, Nothing)
Console.WriteLine("A store isolated by user, assembly, and domain has been obtained.")
' Get a new isolated store for user and assembly.
' Put that store into a different IsolatedStorageFile object.
Dim isoStore2 As IsolatedStorageFile = IsolatedStorageFile.GetStore(IsolatedStorageScope.User Or
IsolatedStorageScope.Assembly, Nothing, Nothing)
Console.WriteLine("A store isolated by user and assembly has been obtained.")
' The Remove method deletes a specific store, in this case the
' isoStore1 file.
isoStore1.Remove()
Console.WriteLine("The user, domain, and assembly isolated store has been deleted.")
' This static method deletes all the isolated stores for this user.
IsolatedStorageFile.Remove(IsolatedStorageScope.User)
Console.WriteLine("All isolated stores for this user have been deleted.")
End Sub
End Class
