WebPermission.Union(IPermission) 方法

定义

命名空间:

System.Net

程序集:

System.Security.Permissions.dll

包:

System.Security.Permissions v8.0.0

Source:

WebPermission.cs

返回 WebPermission 类的两个实例之间的逻辑并集。

public:
 override System::Security::IPermission ^ Union(System::Security::IPermission ^ target);

public override System.Security.IPermission Union (System.Security.IPermission target);

override this.Union : System.Security.IPermission -> System.Security.IPermission

Public Overrides Function Union (target As IPermission) As IPermission

参数

target

IPermission

与当前 WebPermission 进行合并的 WebPermission。

返回

IPermission

表示当前实例和 target 参数的并集的 WebPermission。 如果其中任何一个 WebPermission 是 Unrestricted，则该方法返回一个为 Unrestricted 的 WebPermission。 如果目标为 null，则该方法将返回当前 WebPermission 的副本。

例外

ArgumentException

目标不为 null，也不是 WebPermission 类型。

示例

以下示例采用两 WebPermission 个实例的逻辑联合来创建 的第 WebPermission三个实例。

// Create another WebPermission that is the Union of previous two WebPermission
// instances.
WebPermission^ myWebPermission3 = (WebPermission^)(myWebPermission1->Union( myWebPermission2 ));
Console::WriteLine( "\nAttributes and values of the WebPermission after the Union are : " );
// Display the attributes, values and children.
Console::WriteLine( myWebPermission3->ToXml() );

// Create another WebPermission that is the Union of previous two WebPermission 
// instances.
WebPermission myWebPermission3 =(WebPermission) myWebPermission1.Union(myWebPermission2);
Console.WriteLine("\nAttributes and values of the WebPermission after the Union are : ");
// Display the attributes,values and children.
Console.WriteLine(myWebPermission3.ToXml().ToString());

   ' Create another WebPermission that is the Union of previous two WebPermission 
   ' instances.
   Dim myWebPermission3 As WebPermission = CType(myWebPermission1.Union(myWebPermission2), WebPermission)
   Console.WriteLine(ControlChars.Cr + "Attributes and values of the WebPermission after the Union are : ")
   ' Display the attributes,values and children.
   Console.WriteLine(myWebPermission3.ToXml().ToString())
End Sub

注解

Union 返回一个 ， WebPermission 其中包含和当前实例中的所有 target 权限。

另请参阅

• PermissionState