UIPermission.IsSubsetOf(IPermission) 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
确定当前权限是否为指定权限的子集。
public:
override bool IsSubsetOf(System::Security::IPermission ^ target);public override bool IsSubsetOf (System.Security.IPermission target);override this.IsSubsetOf : System.Security.IPermission -> boolPublic Overrides Function IsSubsetOf (target As IPermission) As Boolean参数
- target
- IPermission
将要测试子集关系的权限。 此权限必须与当前权限属于同一类型。
返回
如果当前权限是指定权限的子集，则为 true；否则为 false。
例外
target 参数不为 null，并且与当前权限不属于同一类型。
示例
下面的代码示例演示 了 方法的行为 IsSubsetOf 。 此示例是为 类提供的更大示例的 UIPermission 一部分。
注意
代码示例旨在显示方法的行为，而不是演示其用法。 通常，权限类的方法由安全基础结构使用;它们通常不用于应用程序。
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
void IsSubsetOfDemo()
{
Console::WriteLine("\n********************** IsSubsetOf() Demo **********************\n");
UIPermission ^ uiPerm1 = gcnew UIPermission(UIPermissionWindow::SafeTopLevelWindows);
UIPermission ^ uiPerm2 = gcnew UIPermission(UIPermissionWindow::SafeSubWindows);
Console::WriteLine(" {0} is {1}a subset of {2} ", uiPerm1->Window,
uiPerm1->IsSubsetOf(uiPerm2)?"":"not ", uiPerm2->Window);
Console::WriteLine(" {0} is {1}a subset of {2} ", uiPerm2->Window,
uiPerm2->IsSubsetOf(uiPerm1)?"":"not ", uiPerm1->Window);
uiPerm1 = gcnew UIPermission(UIPermissionClipboard::AllClipboard);
uiPerm2 = gcnew UIPermission(UIPermissionClipboard::OwnClipboard);
Console::WriteLine(" {0} is {1}a subset of {2} ", uiPerm1->Clipboard,
uiPerm1->IsSubsetOf(uiPerm2)?"":"not ", uiPerm2->Clipboard);
Console::WriteLine(" {0} is {1}a subset of {2} ", uiPerm2->Clipboard,
uiPerm2->IsSubsetOf(uiPerm1)?"":"not ", uiPerm1->Clipboard);
}
// IsSubsetOf determines whether the current permission is a subset of the specified permission.
private static void IsSubsetOfDemo()
{
UIPermission uiPerm1 = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
UIPermission uiPerm2 = new UIPermission(UIPermissionWindow.SafeSubWindows);
CheckIsSubsetOfWindow(uiPerm1, uiPerm2);
uiPerm1 = new UIPermission(UIPermissionClipboard.AllClipboard);
uiPerm2 = new UIPermission(UIPermissionClipboard.OwnClipboard);
CheckIsSubsetOfClipBoard(uiPerm1, uiPerm2);
}
private static void CheckIsSubsetOfWindow(UIPermission uiPerm1, UIPermission uiPerm2)
{
if (uiPerm1.IsSubsetOf(uiPerm2))
{
Console.WriteLine(uiPerm1.Window.ToString() + " is a subset of " +
uiPerm2.Window.ToString());
}
else
{
Console.WriteLine(uiPerm1.Window.ToString() + " is not a subset of " +
uiPerm2.Window.ToString());
}
if (uiPerm2.IsSubsetOf(uiPerm1))
{
Console.WriteLine(uiPerm2.Window.ToString() + " is a subset of " +
uiPerm1.Window.ToString());
}
else
{
Console.WriteLine(uiPerm2.Window.ToString() + " is not a subset of " +
uiPerm1.Window.ToString());
}
}
private static void CheckIsSubsetOfClipBoard(UIPermission uiPerm1, UIPermission uiPerm2)
{
if (uiPerm1.IsSubsetOf(uiPerm2))
{
Console.WriteLine(uiPerm1.Clipboard.ToString() + " is a subset of " +
uiPerm2.Clipboard.ToString());
}
else
{
Console.WriteLine(uiPerm1.Clipboard.ToString() + " is not a subset of " +
uiPerm2.Clipboard.ToString());
}
if (uiPerm2.IsSubsetOf(uiPerm1))
{
Console.WriteLine(uiPerm2.Clipboard.ToString() + " is a subset of " +
uiPerm1.Clipboard.ToString());
}
else
{
Console.WriteLine(uiPerm2.Clipboard.ToString() + " is not a subset of " +
uiPerm1.Clipboard.ToString());
}
}
' IsSubsetOf determines whether the current permission is a subset of the specified permission.
Private Shared Sub IsSubsetOfDemo()
Dim uiPerm1 As New UIPermission(UIPermissionWindow.SafeTopLevelWindows)
Dim uiPerm2 As New UIPermission(UIPermissionWindow.SafeSubWindows)
CheckIsSubsetOfWindow(uiPerm1, uiPerm2)
uiPerm1 = New UIPermission(UIPermissionClipboard.AllClipboard)
uiPerm2 = New UIPermission(UIPermissionClipboard.OwnClipboard)
CheckIsSubsetOfClipBoard(uiPerm1, uiPerm2)
End Sub
Private Shared Sub CheckIsSubsetOfWindow(ByVal uiPerm1 As UIPermission, ByVal uiPerm2 As UIPermission)
If uiPerm1.IsSubsetOf(uiPerm2) Then
Console.WriteLine(uiPerm1.Window.ToString() + " is a subset of " + uiPerm2.Window.ToString())
Else
Console.WriteLine(uiPerm1.Window.ToString() + " is not a subset of " + uiPerm2.Window.ToString())
End If
If uiPerm2.IsSubsetOf(uiPerm1) Then
Console.WriteLine(uiPerm2.Window.ToString() + " is a subset of " + uiPerm1.Window.ToString())
Else
Console.WriteLine(uiPerm2.Window.ToString() + " is not a subset of " + uiPerm1.Window.ToString())
End If
End Sub
Private Shared Sub CheckIsSubsetOfClipBoard(ByVal uiPerm1 As UIPermission, ByVal uiPerm2 As UIPermission)
If uiPerm1.IsSubsetOf(uiPerm2) Then
Console.WriteLine(uiPerm1.Clipboard.ToString() + " is a subset of " + uiPerm2.Clipboard.ToString())
Else
Console.WriteLine(uiPerm1.Clipboard.ToString() + " is not a subset of " + uiPerm2.Clipboard.ToString())
End If
If uiPerm2.IsSubsetOf(uiPerm1) Then
Console.WriteLine(uiPerm2.Clipboard.ToString() + " is a subset of " + uiPerm1.Clipboard.ToString())
Else
Console.WriteLine(uiPerm2.Clipboard.ToString() + " is not a subset of " + uiPerm1.Clipboard.ToString())
End If
End Sub
注解
如果当前权限的所有成功要求也针对指定权限成功，则当前权限是指定权限的子集。 也就是说，指定的权限至少包含子集中包含的权限。 若要 IsSubsetOf 返回 true， UIPermissionWindow 当前权限的 和 UIPermissionClipboard 值必须等于或小于指定权限的值。
