WebPermission.Union(IPermission) 方法

定義

命名空間:

System.Net

組件:

System.Security.Permissions.dll

套件:

System.Security.Permissions v9.0.0-rc.2.24473.5

來源:

WebPermission.cs

傳回 WebPermission 類別的兩個執行個體間的邏輯等位。

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

參數

target

IPermission

WebPermission，要與目前的 WebPermission 比較。

傳回

IPermission

WebPermission，表示目前執行個體和 target 參數間的聯集。 如果 WebPermission 是 Unrestricted，方法將傳回屬於 WebPermission 的 Unrestricted。 如果目標是 null，則方法會傳回目前 WebPermission 的複本。

例外狀況

ArgumentException

目標不是 null 或屬於 WebPermission 型別。

範例

下列範例會採用兩 WebPermission 個實例的邏輯聯集，以建立 的第三個 實例 WebPermission。

// 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

備註

Union 會傳回 ， WebPermission 其中包含和目前 實例中的所有 target 許可權。

另請參閱

• PermissionState