DataProtectionPermission.IsSubsetOf(IPermission) 方法

定义

命名空间:

System.Security.Permissions

程序集:

System.Security.Permissions.dll

程序集:

System.Security.dll

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 -> bool

Public 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

Boolean

如果当前权限是指定权限的子集，则为 true；否则为 false。

例外

ArgumentException

target 不是 null，并且未指定同一类型的权限为当前权限。

示例

下面的代码示例演示了该方法 IsSubsetOf 的使用。 此代码示例是为类提供的大型示例的 DataProtectionPermission 一部分。

备注

代码示例旨在显示方法的行为，而不是演示其用法。 一般情况下，安全基础结构使用权限类的方法;它们通常不用于应用程序。

bool rc = sp2->IsSubsetOf( sp3 );
Console::WriteLine( "Is the permission with all flags set (AllFlags) "
"a subset of \n \tthe permission with an Unrestricted "
"permission state? {0}", (rc ? (String^)"Yes" : "No") );
rc = sp1->IsSubsetOf( sp2 );
Console::WriteLine( "Is the permission with ProtectData access a "
"subset of the permission with \n"
"\tAllFlags set? {0}", (rc ? (String^)"Yes" : "No") );

bool rc = sp2.IsSubsetOf(sp3);
Console.WriteLine("Is the permission with all flags set (AllFlags) " +
    "a subset of \n \tthe permission with an Unrestricted " +
    "permission state? " + (rc ? "Yes" : "No"));
rc = sp1.IsSubsetOf(sp2);
Console.WriteLine("Is the permission with ProtectData access a " +
    "subset of the permission with \n" + "\tAllFlags set? " +
    (rc ? "Yes" : "No"));

Dim rc As Boolean = sp2.IsSubsetOf(sp3)
Console.WriteLine("Is the permission with all flags set (AllFlags) " + "a subset of " + vbLf + " " + vbTab + "the permission with an Unrestricted " + "permission state? " + IIf(rc, "Yes", "No")) 'TODO: For performance reasons this should be changed to nested IF statements
rc = sp1.IsSubsetOf(sp2)
Console.WriteLine("Is the permission with ProtectData access a " + "subset of the permission with " + vbLf + vbTab + "AllFlags set? " + IIf(rc, "Yes", "No")) 'TODO: For performance reasons this should be changed to nested IF statements

注解

如果当前权限指定了一组完全包含在指定权限中的操作，则当前权限是指定权限的子集。 例如，访问权限 ProtectData 的子集是访问权限的 AllFlags 子集。