NetworkInformationPermission.IsSubsetOf(IPermission) Metode
Definisi
Penting
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Menentukan apakah izin saat ini adalah subset dari izin yang ditentukan.
public:
override bool IsSubsetOf(System::Security::IPermission ^ target);
public override bool IsSubsetOf (System.Security.IPermission target);
override this.IsSubsetOf : System.Security.IPermission -> bool
Public Overrides Function IsSubsetOf (target As IPermission) As Boolean
Parameter
- target
- IPermission
IPermission Yang akan diuji untuk hubungan subset. Izin ini harus bertipe sama dengan izin saat ini.
Mengembalikan
true
jika izin saat ini adalah subset dari izin yang ditentukan; jika tidak, false
.
Contoh
Contoh kode berikut menampilkan hubungan subset antara dua izin.
System::Net::NetworkInformation::NetworkInformationPermission^ unrestricted = gcnew System::Net::NetworkInformation::NetworkInformationPermission( System::Security::Permissions::PermissionState::Unrestricted );
Console::WriteLine( L"Is unrestricted? {0}", unrestricted->IsUnrestricted() );
System::Net::NetworkInformation::NetworkInformationPermission^ read = gcnew System::Net::NetworkInformation::NetworkInformationPermission( System::Net::NetworkInformation::NetworkInformationAccess::Read );
System::Net::NetworkInformation::NetworkInformationPermission^ copyPermission = dynamic_cast<System::Net::NetworkInformation::NetworkInformationPermission^>(read->Copy());
System::Net::NetworkInformation::NetworkInformationPermission^ unionPermission = dynamic_cast<System::Net::NetworkInformation::NetworkInformationPermission^>(read->Union( unrestricted ));
Console::WriteLine( L"Is subset?{0}", read->IsSubsetOf( unionPermission ) );
System.Net.NetworkInformation.NetworkInformationPermission unrestricted =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Security.Permissions.PermissionState.Unrestricted);
Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted());
System.Net.NetworkInformation.NetworkInformationPermission read =
new System.Net.NetworkInformation.NetworkInformationPermission(
System.Net.NetworkInformation.NetworkInformationAccess.Read);
System.Net.NetworkInformation.NetworkInformationPermission copyPermission =
(System.Net.NetworkInformation.NetworkInformationPermission) read.Copy();
System.Net.NetworkInformation.NetworkInformationPermission unionPermission =
(System.Net.NetworkInformation.NetworkInformationPermission) read.Union(unrestricted);
Console.WriteLine("Is subset?" + read.IsSubsetOf(unionPermission));
Dim unrestricted As New System.Net.NetworkInformation.NetworkInformationPermission( _
System.Security.Permissions.PermissionState.Unrestricted)
Console.WriteLine("Is unrestricted? " + unrestricted.IsUnrestricted().ToString())
Dim read As New System.Net.NetworkInformation.NetworkInformationPermission( _
System.Net.NetworkInformation.NetworkInformationAccess.Read)
Dim copyPermission As System.Net.NetworkInformation.NetworkInformationPermission = _
CType(read.Copy(), System.Net.NetworkInformation.NetworkInformationPermission)
Dim unionPermission As System.Net.NetworkInformation.NetworkInformationPermission = _
CType(read.Union(unrestricted), System.Net.NetworkInformation.NetworkInformationPermission)
Console.WriteLine("Is subset?" + read.IsSubsetOf(unionPermission).ToString())
Keterangan
Izin saat ini adalah subset dari izin yang ditentukan jika izin saat ini menentukan status yang sepenuhnya terkandung oleh izin yang ditentukan. Jika metode ini mengembalikan true, izin saat ini tidak mewakili akses lagi ke sumber daya yang dilindungi daripada izin yang ditentukan.