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Porady: usuwanie plików i katalogów w izolowanym magazynie

  • Artykuł

Katalogi i pliki można usuwać w izolowanym pliku magazynu. W magazynie nazwy plików i katalogów są zależne od systemu operacyjnego i są określane jako względem katalogu głównego wirtualnego systemu plików. Nie są uwzględniane wielkości liter w systemach operacyjnych Windows.

Klasa System.IO.IsolatedStorage.IsolatedStorageFile dostarcza dwie metody usuwania katalogów i plików: DeleteDirectory i DeleteFile. Jeśli IsolatedStorageException spróbujesz usunąć plik lub katalog, który nie istnieje, zostanie zgłoszony wyjątek. Jeśli w nazwie dołączysz symbol wieloznaczny, DeleteDirectory zgłosi wyjątek IsolatedStorageException i DeleteFile zgłosi wyjątek ArgumentException .

Metoda DeleteDirectory kończy się niepowodzeniem, jeśli katalog zawiera pliki lub podkatalogi. Możesz użyć GetFileNames metod i GetDirectoryNames , aby pobrać istniejące pliki i katalogi. Aby uzyskać więcej informacji na temat przeszukiwania wirtualnego systemu plików magazynu, zobacz Jak znaleźć istniejące pliki i katalogi w izolowanym magazynie.

Przykład

Poniższy przykład kodu tworzy, a następnie usuwa kilka katalogów i plików.

using namespace System;
using namespace System::IO::IsolatedStorage;
using namespace System::IO;

public ref class DeletingFilesDirectories
{
public:
    static void Main()
    {
        // Get a new isolated store for this user domain and assembly.
        // Put the store into an isolatedStorageFile object.

        IsolatedStorageFile^ isoStore =  IsolatedStorageFile::GetStore(IsolatedStorageScope::User |
            IsolatedStorageScope::Domain | IsolatedStorageScope::Assembly, (Type ^)nullptr, (Type ^)nullptr);

        Console::WriteLine("Creating Directories:");

        // This code creates several different directories.

        isoStore->CreateDirectory("TopLevelDirectory");
        Console::WriteLine("TopLevelDirectory");
        isoStore->CreateDirectory("TopLevelDirectory/SecondLevel");
        Console::WriteLine("TopLevelDirectory/SecondLevel");

        // This code creates two new directories, one inside the other.

        isoStore->CreateDirectory("AnotherTopLevelDirectory/InsideDirectory");
        Console::WriteLine("AnotherTopLevelDirectory/InsideDirectory");
        Console::WriteLine();

        // This code creates a few files and places them in the directories.

        Console::WriteLine("Creating Files:");

        // This file is placed in the root.

        IsolatedStorageFileStream^ isoStream1 = gcnew IsolatedStorageFileStream("InTheRoot.txt",
            FileMode::Create, isoStore);
        Console::WriteLine("InTheRoot.txt");

        isoStream1->Close();

        // This file is placed in the InsideDirectory.

        IsolatedStorageFileStream^ isoStream2 = gcnew IsolatedStorageFileStream(
            "AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt", FileMode::Create, isoStore);
        Console::WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console::WriteLine();

        isoStream2->Close();

        Console::WriteLine("Deleting File:");

        // This code deletes the HereIAm.txt file.
        isoStore->DeleteFile("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console::WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console::WriteLine();

        Console::WriteLine("Deleting Directory:");

        // This code deletes the InsideDirectory.

        isoStore->DeleteDirectory("AnotherTopLevelDirectory/InsideDirectory/");
        Console::WriteLine("AnotherTopLevelDirectory/InsideDirectory/");
        Console::WriteLine();

    } // End of main.
};

int main()
{
    DeletingFilesDirectories::Main();
}

using System;
using System.IO.IsolatedStorage;
using System.IO;

public class DeletingFilesDirectories
{
    public static void Main()
    {
        // Get a new isolated store for this user domain and assembly.
        // Put the store into an isolatedStorageFile object.

        IsolatedStorageFile isoStore =  IsolatedStorageFile.GetStore(IsolatedStorageScope.User |
            IsolatedStorageScope.Domain | IsolatedStorageScope.Assembly, null, null);

        Console.WriteLine("Creating Directories:");

        // This code creates several different directories.

        isoStore.CreateDirectory("TopLevelDirectory");
        Console.WriteLine("TopLevelDirectory");
        isoStore.CreateDirectory("TopLevelDirectory/SecondLevel");
        Console.WriteLine("TopLevelDirectory/SecondLevel");

        // This code creates two new directories, one inside the other.

        isoStore.CreateDirectory("AnotherTopLevelDirectory/InsideDirectory");
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory");
        Console.WriteLine();

        // This code creates a few files and places them in the directories.

        Console.WriteLine("Creating Files:");

        // This file is placed in the root.

        IsolatedStorageFileStream isoStream1 = new IsolatedStorageFileStream("InTheRoot.txt",
            FileMode.Create, isoStore);
        Console.WriteLine("InTheRoot.txt");

        isoStream1.Close();

        // This file is placed in the InsideDirectory.

        IsolatedStorageFileStream isoStream2 = new IsolatedStorageFileStream(
            "AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt", FileMode.Create, isoStore);
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console.WriteLine();

        isoStream2.Close();

        Console.WriteLine("Deleting File:");

        // This code deletes the HereIAm.txt file.
        isoStore.DeleteFile("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt");
        Console.WriteLine();

        Console.WriteLine("Deleting Directory:");

        // This code deletes the InsideDirectory.

        isoStore.DeleteDirectory("AnotherTopLevelDirectory/InsideDirectory/");
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/");
        Console.WriteLine();
    } // End of main.
}

Imports System.IO.IsolatedStorage
Imports System.IO

Public Class DeletingFilesDirectories
    Public Shared Sub Main()
        ' Get a new isolated store for this user domain and assembly.
        ' Put the store into an isolatedStorageFile object.

        Dim isoStore As IsolatedStorageFile = IsolatedStorageFile.GetStore(IsolatedStorageScope.User Or
            IsolatedStorageScope.Domain Or IsolatedStorageScope.Assembly, Nothing, Nothing)

        Console.WriteLine("Creating Directories:")

        ' This code creates several different directories.

        isoStore.CreateDirectory("TopLevelDirectory")
        Console.WriteLine("TopLevelDirectory")
        isoStore.CreateDirectory("TopLevelDirectory/SecondLevel")
        Console.WriteLine("TopLevelDirectory/SecondLevel")

        ' This code creates two new directories, one inside the other.

        isoStore.CreateDirectory("AnotherTopLevelDirectory/InsideDirectory")
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory")
        Console.WriteLine()

        ' This code creates a few files and places them in the directories.

        Console.WriteLine("Creating Files:")

        ' This file is placed in the root.

        Dim isoStream1 As New IsolatedStorageFileStream("InTheRoot.txt", FileMode.Create, isoStore)
        Console.WriteLine("InTheRoot.txt")

        isoStream1.Close()

        ' This file is placed in the InsideDirectory.

        Dim isoStream2 As New IsolatedStorageFileStream(
            "AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt", FileMode.Create, isoStore)
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt")
        Console.WriteLine()

        isoStream2.Close()

        Console.WriteLine("Deleting File:")

        ' This code deletes the HereIAm.txt file.
        isoStore.DeleteFile("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt")
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/HereIAm.txt")
        Console.WriteLine()

        Console.WriteLine("Deleting Directory:")

        ' This code deletes the InsideDirectory.

        isoStore.DeleteDirectory("AnotherTopLevelDirectory/InsideDirectory/")
        Console.WriteLine("AnotherTopLevelDirectory/InsideDirectory/")
        Console.WriteLine()

    End Sub
End Class

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