//</Snippet3>
// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
//<Snippet4>
private bool IntersectDemo()
{
bool returnValue = true;
string fileIO1, fileIO2;
FileIOPermission fileIOPerm1, fileIOPerm2, fileIOPerm3;
FileIOGenerator fileIOGen1 = new FileIOGenerator();
FileIOGenerator fileIOGen2 = new FileIOGenerator();
fileIOGen1.ResetIndex();
while (fileIOGen1.CreateFilePath(out fileIO1))
{
if (fileIO1 == "")
{
fileIOPerm1 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm1 = new FileIOPermission(FileIOPermissionAccess.Read, fileIO1);
}
Console.WriteLine("**********************************************************\n");
fileIOGen2.ResetIndex();
while (fileIOGen2.CreateFilePath(out fileIO2))
{
if (fileIO2 == "")
{
fileIOPerm2 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm2 = new FileIOPermission(FileIOPermissionAccess.Read, fileIO2);
}
string firstPermission = fileIO1 == "" | fileIO1 == null ? "null" : fileIO1;
string secondPermission = fileIO2 == "" | fileIO2 == null ? "null" : fileIO2;
try
{
fileIOPerm3 = (FileIOPermission)fileIOPerm1.Intersect(fileIOPerm2);
if (fileIOPerm3 != null && fileIOPerm3.GetPathList(FileIOPermissionAccess.Read) != null)
{
Console.WriteLine("The intersection of " + firstPermission + " and \n\t" + secondPermission +
" = \n\t" + ((FileIOPermission)fileIOPerm3).GetPathList(FileIOPermissionAccess.Read)[0]);
}
else
{
Console.WriteLine("The intersection of " + firstPermission + " and " + secondPermission + " is null.");
}
}
catch (Exception e)
{
Console.WriteLine("An exception was thrown for intersection " + e);
returnValue = false;
}
}
}
return(returnValue);
}
//</Snippet4>
//Copy creates and returns an identical copy of the current permission.
//<Snippet5>
private bool CopyDemo()
{
bool returnValue = true;
string fileIO1;
FileIOPermission fileIOPerm1, fileIOPerm2;
FileIOGenerator fileIOGen1 = new FileIOGenerator();
FileIOGenerator fileIOGen2 = new FileIOGenerator();
fileIOGen1.ResetIndex();
while (fileIOGen1.CreateFilePath(out fileIO1))
{
if (fileIO1 == "")
{
fileIOPerm1 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm1 = new FileIOPermission(FileIOPermissionAccess.Read, fileIO1);
}
Console.WriteLine("**********************************************************\n");
fileIOGen2.ResetIndex();
try
{
fileIOPerm2 = (FileIOPermission)fileIOPerm1.Copy();
if (fileIOPerm2 != null)
{
Console.WriteLine("Result of copy = " + fileIOPerm2.ToString() + "\n");
}
else
{
Console.WriteLine("Result of copy is null. \n");
}
}
catch (Exception e)
{
{
if (fileIO1 == "")
{
Console.WriteLine("The target FileIOPermission is empty, copy failed.");
}
else
{
Console.WriteLine(e);
}
}
continue;
}
}
return(returnValue);
}
//</Snippet5>
// ToXml creates an XML encoding of the permission and its current state;
// FromXml reconstructs a permission with the specified state from the XML encoding.
//<Snippet6>
private bool ToFromXmlDemo()
{
bool returnValue = true;
string fileIO1;
FileIOPermission fileIOPerm1, fileIOPerm2;
FileIOGenerator fileIOGen1 = new FileIOGenerator();
FileIOGenerator fileIOGen2 = new FileIOGenerator();
fileIOGen1.ResetIndex();
while (fileIOGen1.CreateFilePath(out fileIO1))
{
if (fileIO1 == "")
{
fileIOPerm1 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm1 = new FileIOPermission(FileIOPermissionAccess.Read, fileIO1);
}
Console.WriteLine("********************************************************\n");
fileIOGen2.ResetIndex();
try
{
fileIOPerm2 = new FileIOPermission(PermissionState.None);
fileIOPerm2.FromXml(fileIOPerm1.ToXml());
Console.WriteLine("Result of ToFromXml = " + fileIOPerm2.ToString() + "\n");
}
catch (Exception e)
{
Console.WriteLine("ToFromXml failed :" + fileIOPerm1.ToString() + e);
continue;
}
}
return(returnValue);
}
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
// This method compares various FileIOPermission paths with FileIOPermissionAccess set to AllAccess.
//<Snippet2>
private bool IsSubsetOfDemo()
{
bool returnValue = true;
string fileIO1, fileIO2;
FileIOPermission fileIOPerm1, fileIOPerm2;
FileIOGenerator fileIOGen1 = new FileIOGenerator();
FileIOGenerator fileIOGen2 = new FileIOGenerator();
fileIOGen1.ResetIndex();
while (fileIOGen1.CreateFilePath(out fileIO1))
{
if (fileIO1 == "")
{
fileIOPerm1 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm1 = new FileIOPermission(FileIOPermissionAccess.AllAccess, fileIO1);
}
Console.WriteLine("**********************************************************\n");
fileIOGen2.ResetIndex();
while (fileIOGen2.CreateFilePath(out fileIO2))
{
if (fileIO2 == "")
{
fileIOPerm2 = new FileIOPermission(PermissionState.None);
}
else
{
fileIOPerm2 = new FileIOPermission(FileIOPermissionAccess.AllAccess, fileIO2);
}
string firstPermission = fileIO1 == "" | fileIO1 == null ? "null" : fileIO1;
string secondPermission = fileIO2 == "" | fileIO2 == null ? "null" : fileIO2;
if (fileIOPerm2 == null)
{
continue;
}
try
{
if (fileIOPerm1.IsSubsetOf(fileIOPerm2))
{
Console.WriteLine(firstPermission + " is a subset of " + secondPermission + "\n");
}
else
{
Console.WriteLine(firstPermission + " is not a subset of " + secondPermission + "\n");
}
}
catch (Exception e)
{
Console.WriteLine("An exception was thrown for subset :" + fileIO1 == "" ? "null" : fileIO1 + "\n" +
fileIO2 == "" ? "null" : fileIO2 + "\n" + e);
}
}
}
return(returnValue);
}