PrincipalPermission.IsSubsetOf(IPermission) 方法

定义

命名空间:

System.Security.Permissions

程序集:

System.Security.Permissions.dll

程序集:

程序集:

mscorlib.dll

确定当前权限是否为指定权限的子集。

public:
 virtual bool IsSubsetOf(System::Security::IPermission ^ target);

public bool IsSubsetOf (System.Security.IPermission target);

abstract member IsSubsetOf : System.Security.IPermission -> bool
override this.IsSubsetOf : System.Security.IPermission -> bool

Public 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

Boolean

如果当前权限是指定权限的子集，则为 true；否则为 false。

实现

IsSubsetOf(IPermission)

例外

ArgumentException

target 参数是一个对象，并且与当前权限不属于同一类型。

示例

下面的示例定义了 PrincipalPermission 对应于三个不同用户的实例。 然后，将两个其他实例创建为用户组。 pp1 表示 Bob 和 Louise， pp2 表示 bob、Louise 和 Greg。

//Define users and roles.
PrincipalPermission^ ppBob = gcnew PrincipalPermission( "Bob", "Manager" );
PrincipalPermission^ ppLouise = gcnew PrincipalPermission( "Louise", "Supervisor" );
PrincipalPermission^ ppGreg = gcnew PrincipalPermission( "Greg", "Employee" );

//Define groups of users.
PrincipalPermission^ pp1 = (PrincipalPermission^) (ppBob->Union( ppLouise ));
PrincipalPermission^ pp2 = (PrincipalPermission^) (ppGreg->Union( pp1 ));

//Define users and roles.
PrincipalPermission ppBob = new PrincipalPermission("Bob", "Manager");
PrincipalPermission ppLouise = new PrincipalPermission("Louise", "Supervisor");
PrincipalPermission ppGreg = new PrincipalPermission("Greg", "Employee");

//Define groups of users.
PrincipalPermission pp1 = (PrincipalPermission)ppBob.Union(ppLouise);
PrincipalPermission pp2 = (PrincipalPermission)ppGreg.Union(pp1);

'Define users and roles.
Dim ppBob As New PrincipalPermission("Bob", "Manager")
Dim ppLouise As New PrincipalPermission("Louise", "Supervisor")
Dim ppGreg As New PrincipalPermission("Greg", "Employee")
       
'Define groups of users.
Dim pp1 As PrincipalPermission = _
   CType(ppBob.Union(ppLouise), PrincipalPermission)
Dim pp2 As PrincipalPermission = _
   CType(ppGreg.Union(pp1), PrincipalPermission)

对于前面的声明， pp1.IsSubsetOf(pp2) 返回 true ，并 pp2.IsSubsetOf(pp1) 返回 false 。

注解

当前权限是指定权限的子集（如果对于指定的权限，当前权限的所有成功请求也都已成功）。