StrongNameIdentityPermission.Intersect(IPermission) 方法
定义
重要
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创建并返回一个权限，该权限是当前权限与指定权限的交集。
public:
override System::Security::IPermission ^ Intersect(System::Security::IPermission ^ target);public override System.Security.IPermission Intersect(System.Security.IPermission target);override this.Intersect : System.Security.IPermission -> System.Security.IPermissionPublic Overrides Function Intersect (target As IPermission) As IPermission参数
- target
- IPermission
要与当前权限相交的权限。 它必须与当前权限属于同一类型。
返回
一个新权限，表示当前权限与指定权限的交集，或者若果交集为空，则为 null。
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使用 Intersect 方法的结果，而不是如何使用 方法。 此示例是为 类提供的更大示例的 StrongNameIdentityPermission 一部分。 此示例的最佳用途是生成并执行整个示例，并查看其输出。
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。
// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
bool IntersectDemo()
{
bool returnValue = true;
StrongNameIdentityPermission^ snIdPerm1;
StrongNameIdentityPermission^ snIdPerm2;
StrongNameIdentityPermission^ snIdPerm3;
snIdPerm1 = gcnew StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", gcnew Version("1.0.0.0"));
snIdPerm2 = gcnew StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", gcnew Version("1.0.0.0"));
try
{
snIdPerm3 = dynamic_cast<StrongNameIdentityPermission^>(snIdPerm1->Intersect(snIdPerm2));
Console::WriteLine("The intersection of MyCompany.MyDepartment.*" +
"and MyCompany.MyDepartment.MyFile is " +
(dynamic_cast<StrongNameIdentityPermission^>(snIdPerm3))->Name);
}
catch (Exception^ e)
{
Console::WriteLine("An exception was thrown: " + e);
returnValue = false;
}
return returnValue;
}
// Intersect creates and returns a new permission that is the intersection of the current
// permission and the permission specified.
private bool IntersectDemo()
{
bool returnValue = true;
StrongNameIdentityPermission snIdPerm1, snIdPerm2, snIdPerm3;
snIdPerm1 = new StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", new Version("1.0.0.0"));
snIdPerm2 = new StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", new Version("1.0.0.0"));
try
{
snIdPerm3 = (StrongNameIdentityPermission)snIdPerm1.Intersect(snIdPerm2);
Console.WriteLine("The intersection of MyCompany.MyDepartment.*"
+ "MyCompany.MyDepartment.MyFile is "
+ ((StrongNameIdentityPermission)snIdPerm3).Name.ToString());
}
catch (Exception e)
{
Console.WriteLine("An exception was thrown: " + e);
returnValue = false;
}
return returnValue;
}
' Intersect creates and returns a new permission that is the intersection of the current
' permission and the permission specified.
Private Function IntersectDemo() As Boolean
Dim returnValue As Boolean = True
Dim snIdPerm1, snIdPerm2, snIdPerm3 As StrongNameIdentityPermission
snIdPerm1 = New StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", New Version("1.0.0.0"))
snIdPerm2 = New StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.MyFile", New Version("1.0.0.0"))
Try
snIdPerm3 = CType(snIdPerm1.Intersect(snIdPerm2), StrongNameIdentityPermission)
Console.WriteLine("The intersection of MyCompany.MyDepartment.*" + "MyCompany.MyDepartment.MyFile is " + CType(snIdPerm3, StrongNameIdentityPermission).Name.ToString())
Catch e As Exception
Console.WriteLine("An exception was thrown: " + e.ToString())
returnValue = False
End Try
Return returnValue
End Function 'IntersectDemo
注解
两个权限的交集是一个权限，用于描述它们共同描述的操作集。 只有传递两个原始权限的要求才会传递交集。
两个相同的强名称标识权限的交集是相同的权限。 两个不同 (不是通配符) 表达式的交集是空权限。 通配符表达式和匹配的强名称的交集是强名称。 匹配的两个通配符表达式的交集较长，更具体。
