FileIOPermission.GetPathList(FileIOPermissionAccess) Method

Definition

Namespace:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

Source:

FileIOPermission.cs

Gets all files and directories with the specified FileIOPermissionAccess.

C#

public string[] GetPathList(System.Security.Permissions.FileIOPermissionAccess access);

Parameters

access

FileIOPermissionAccess

One of the FileIOPermissionAccess values that represents a single type of file access.

Returns

String[]

An array containing the paths of the files and directories to which access specified by the access parameter is granted.

Exceptions

ArgumentException

access is not a valid value of FileIOPermissionAccess.

-or-

access is AllAccess, which represents more than one type of file access, or NoAccess, which does not represent any type of file access.

Examples

The following code example shows the use of the GetPathList method. This example is part of a larger example provided for the FileIOPermission class.

C#

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;
}

Remarks

Use this method to get the state of the current permission. To get the state of both Read and Write access, two calls to this method are required.

Note

The access parameter is limited to the values of FileIOPermissionAccess, which represent single types of file access. Those values are Read, Write, Append, and PathDiscovery. The values acceptable to access do not include NoAccess and AllAccess, which do not represent single types of file access.

Applies to