Freigeben über

FileIOPermission.GetPathList-Methode

  • Artikel

Ruft alle Dateien und Verzeichnisse mit dem angegebenen FileIOPermissionAccess ab.

Namespace: System.Security.Permissions
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Function GetPathList ( _
    access As FileIOPermissionAccess _
) As String()
'Usage
Dim instance As FileIOPermission
Dim access As FileIOPermissionAccess
Dim returnValue As String()

returnValue = instance.GetPathList(access)

public string[] GetPathList (
    FileIOPermissionAccess access
)

public:
array<String^>^ GetPathList (
    FileIOPermissionAccess access
)

public String[] GetPathList (
    FileIOPermissionAccess access
)

public function GetPathList (
    access : FileIOPermissionAccess
) : String[]

Parameter

Rückgabewert

Ein Array mit den Pfaden der Dateien und Verzeichnisse, auf die der vom access-Parameter angegebene Zugriff gewährt wird.

Ausnahmen

Ausnahmetyp Bedingung

ArgumentException

access ist kein gültiger FileIOPermissionAccess-Wert.

– oder –

access hat den Wert AllAccess, der mehrere Dateizugriffstypen darstellt, oder den Wert NoAccess, der keinen Dateizugriffstyp darstellt.

Hinweise

Rufen Sie mit dieser Methode den Zustand der aktuellen Berechtigung ab. Sie müssen diese Methode zweimal aufrufen, um den Zustand des Read-Zugriffs und des Write-Zugriffs abzurufen.

Hinweis

Der access-Parameter ist auf die Werte von FileIOPermissionAccess beschränkt, die einzelne Dateizugriffstypen darstellen. Diese Werte sind Read, Write, Append und PathDiscovery. NoAccess und AllAccess gehören nicht zu den von access akzeptierten Werten, da sie keine einzelnen Dateizugriffstypen darstellen.

Beispiel

Private Function SetGetPathListDemo() As Boolean
    Try
        Console.WriteLine("********************************************************" & ControlChars.Lf)

        Dim fileIOPerm1 As FileIOPermission
        Console.WriteLine("Creating a FileIOPermission with AllAccess rights for 'C:\Examples\Test\TestFile.txt")
        fileIOPerm1 = New FileIOPermission(FileIOPermissionAccess.AllAccess, "C:\Examples\Test\TestFile.txt")
        Console.WriteLine("Adding 'C:\Temp' to the write access list, and " & ControlChars.Lf & " 'C:\Examples\Test' to read access.")
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Write, "C:\Temp")
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Read, "C:\Examples\Test")
        Dim paths As String() = fileIOPerm1.GetPathList(FileIOPermissionAccess.Read)
        Console.WriteLine("Read access before SetPathList = ")
        Dim path As String
        For Each path In paths
            Console.WriteLine((ControlChars.Tab & path))
        Next path
        Console.WriteLine("Setting the read access list to " & ControlChars.Lf & "'C:\Temp'")
        fileIOPerm1.SetPathList(FileIOPermissionAccess.Read, "C:\Temp")
        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Read)
        Console.WriteLine("Read access list after SetPathList = ")
        For Each path In paths
            Console.WriteLine((ControlChars.Tab & path))
        Next path

        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Write)
        Console.WriteLine("Write access list after SetPathList = ")
        For Each path In paths
            Console.WriteLine((ControlChars.Tab & path))
        Next path

        Dim pathList() As String
        pathList = fileIOPerm1.GetPathList(FileIOPermissionAccess.AllAccess)

    Catch e As ArgumentException
        ' FileIOPermissionAccess.AllAccess can not be used as a parameter for GetPathList.
        Console.WriteLine(("An ArgumentException occurred as a result of using AllAccess. " & "This property cannot be used as a parameter in GetPathList " & "because it represents more than one type of file variable access. : " & ControlChars.Lf & e.ToString()))
    End Try

    Return True
End Function 'SetGetPathListDemo

private bool SetGetPathListDemo()
{
    try
    {
        Console.WriteLine("********************************************************\n");

        FileIOPermission fileIOPerm1;
        Console.WriteLine("Creating a FileIOPermission with AllAccess rights for 'C:\\Examples\\Test\\TestFile.txt");
        fileIOPerm1 = new FileIOPermission(FileIOPermissionAccess.AllAccess, "C:\\Examples\\Test\\TestFile.txt");
        Console.WriteLine("Adding 'C:\\Temp' to the write access list, and \n 'C:\\Examples\\Test' to read access.");
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Write, "C:\\Temp");
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Read, "C:\\Examples\\Test");
        string[] paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Read);
        Console.WriteLine("Read access before SetPathList = ");
        foreach (string path in paths)
        {
            Console.WriteLine("\t" + path);
        }
        Console.WriteLine("Setting the read access list to \n'C:\\Temp'");
        fileIOPerm1.SetPathList(FileIOPermissionAccess.Read, "C:\\Temp");
        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Read);
        Console.WriteLine("Read access list after SetPathList = ");
        foreach (string path in paths)
        {
            Console.WriteLine("\t" + path);
        }

        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Write);
        Console.WriteLine("Write access list after SetPathList = ");
        foreach (string path in paths)
        {
            Console.WriteLine("\t" + path);
        }

        Console.WriteLine("Write access = \n" +
            fileIOPerm1.GetPathList(FileIOPermissionAccess.AllAccess));

    }
    catch (ArgumentException e)
    {
        // FileIOPermissionAccess.AllAccess can not be used as a parameter for GetPathList.
        Console.WriteLine("An ArgumentException occurred as a result of using AllAccess. "
            + "This property cannot be used as a parameter in GetPathList "
            + "because it represents more than one type of file variable access. : \n" + e);
    }

    return true;
}

bool SetGetPathListDemo()
{
   try
   {
      Console::WriteLine( "********************************************************\n" );
      FileIOPermission^ fileIOPerm1;
      Console::WriteLine( "Creating a FileIOPermission with AllAccess rights for 'C:\\Examples\\Test\\TestFile.txt" );
      
      fileIOPerm1 = gcnew FileIOPermission( FileIOPermissionAccess::AllAccess,"C:\\Examples\\Test\\TestFile.txt" );
      
      Console::WriteLine( "Adding 'C:\\Temp' to the write access list, and \n 'C:\\Examples\\Test' to read access." );
      fileIOPerm1->AddPathList( FileIOPermissionAccess::Write, "C:\\Temp" );
      fileIOPerm1->AddPathList( FileIOPermissionAccess::Read, "C:\\Examples\\Test" );
      array<String^>^paths = fileIOPerm1->GetPathList( FileIOPermissionAccess::Read );
      Console::WriteLine( "Read access before SetPathList = " );
      IEnumerator^ myEnum = paths->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         String^ path = safe_cast<String^>(myEnum->Current);
         Console::WriteLine( "\t{0}", path );
      }

      Console::WriteLine( "Setting the read access list to \n'C:\\Temp'" );
      fileIOPerm1->SetPathList( FileIOPermissionAccess::Read, "C:\\Temp" );
      paths = fileIOPerm1->GetPathList( FileIOPermissionAccess::Read );
      Console::WriteLine( "Read access list after SetPathList = " );
      IEnumerator^ myEnum1 = paths->GetEnumerator();
      while ( myEnum1->MoveNext() )
      {
         String^ path = safe_cast<String^>(myEnum1->Current);
         Console::WriteLine( "\t{0}", path );
      }

      paths = fileIOPerm1->GetPathList( FileIOPermissionAccess::Write );
      Console::WriteLine( "Write access list after SetPathList = " );
      IEnumerator^ myEnum2 = paths->GetEnumerator();
      while ( myEnum2->MoveNext() )
      {
         String^ path = safe_cast<String^>(myEnum2->Current);
         Console::WriteLine( "\t{0}", path );
      }

      Console::WriteLine( "Write access = \n{0}", fileIOPerm1->GetPathList( FileIOPermissionAccess::AllAccess ) );
   }
   catch ( ArgumentException^ e ) 
   {
      
      // FileIOPermissionAccess.AllAccess can not be used as a parameter for GetPathList.
      Console::WriteLine( "An ArgumentException occurred as a result of using AllAccess. This property cannot be used as a parameter in GetPathList because it represents more than one type of file variable access. : \n{0}", e );
   }

   return true;
}


// AllAccess
// AddPathList adds access for the specified files and directories to the 
// existing state of the permission.
// SetPathList sets the specified access to the specified files and 
// directories, replacing the existing state of the permission.
// GetPathList gets all files and directories that have the specified 
// FileIOPermissionAccess.
private boolean SetGetPathListDemo() 
{
    try {
        Console.WriteLine("****************************" 
            + "****************************\n");
        FileIOPermission fileIOPerm1;
        
        Console.WriteLine("Creating a FileIOPermission with AllAccess " 
            + "rights for 'C:\\Examples\\Test\\TestFile.txt");
        fileIOPerm1 = new FileIOPermission(
            FileIOPermissionAccess.AllAccess, 
            "C:\\Examples\\Test\\TestFile.txt");

        Console.WriteLine("Adding 'C:\\Temp' to the write access " 
            + "list, and \n " +    "'C:\\Examples\\Test' to read access.");
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Write, "C:\\Temp");
        fileIOPerm1.AddPathList(FileIOPermissionAccess.Read, 
            "C:\\Examples\\Test");
        String paths[] = fileIOPerm1.GetPathList(
            FileIOPermissionAccess.Read);
        Console.WriteLine("Read access before SetPathList = ");
        for (int iCtr = 0; iCtr < paths.length; iCtr++) {
            String path = paths[iCtr];
            Console.WriteLine(("\t" + path));
        }

        Console.WriteLine("Setting the read access list to \n'C:\\Temp'");
        fileIOPerm1.SetPathList(FileIOPermissionAccess.Read, "C:\\Temp");
        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Read);
        Console.WriteLine("Read access list after SetPathList = ");
        for (int iCtr = 0; iCtr < paths.length; iCtr++) {
            String path = paths[iCtr];
            Console.WriteLine(("\t" + path));
        }            
        
        paths = fileIOPerm1.GetPathList(FileIOPermissionAccess.Write);
        Console.WriteLine("Write access list after SetPathList = ");
        for (int iCtr = 0; iCtr < paths.length; iCtr++) {
            String path = paths[iCtr];
            Console.WriteLine(("\t" + path));
        }            
        Console.WriteLine(("Write access = \n" 
            + fileIOPerm1.GetPathList(FileIOPermissionAccess.AllAccess)));
    }
    catch(ArgumentException e){
        // FileIOPermissionAccess.AllAccess can not be used as a 
        // parameter for GetPathList.
        Console.WriteLine(("An ArgumentException occurred as a result " 
            + "of using AllAccess. " + "This property cannot be used as a " 
            + "parameter in GetPathList " 
            + "because it represents more than one type of " 
            + "file variable access. : \n" + e));
    }
    return true ;
} //SetGetPathListDemo

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

FileIOPermission-Klasse
FileIOPermission-Member
System.Security.Permissions-Namespace