RealProxy.GetCOMIUnknown(Boolean) 方法

定義

命名空間:

System.Runtime.Remoting.Proxies

組件:

mscorlib.dll

要求目前 Proxy 執行個體所表示之物件的 Unmanaged 參考。

public:
 virtual IntPtr GetCOMIUnknown(bool fIsMarshalled);

[System.Security.SecurityCritical]
public virtual IntPtr GetCOMIUnknown (bool fIsMarshalled);

[<System.Security.SecurityCritical>]
abstract member GetCOMIUnknown : bool -> nativeint
override this.GetCOMIUnknown : bool -> nativeint

Public Overridable Function GetCOMIUnknown (fIsMarshalled As Boolean) As IntPtr

參數

fIsMarshalled

Boolean

如果要求物件參考是為了封送處理至遠端位置，則為 true；如果要求物件參考是為了透過 COM 和目前處理序中的 Unmanaged 物件進行通訊，則為 false。

傳回

IntPtr

nativeint

如果要求物件參考是為了透過 COM 和目前處理序中的 Unmanaged 物件進行通訊，則為 COM 可呼叫包裝函式的指標；如果要求物件參考是為了封送處理至遠端位置，則為快取或新產生的 IUnknown COM 介面指標。

屬性

SecurityCriticalAttribute

範例

[SecurityPermission(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::Infrastructure)]
IntPtr SupportsInterface( Guid * /*myGuid*/ )
{
   Console::WriteLine( "SupportsInterface method called" );
   
   // Object reference is requested for communication with unmanaged objects
   // in the current process through COM.
   IntPtr myIntPtr = this->GetCOMIUnknown( false );
   
   // Stores an unmanaged proxy of the object.
   this->SetCOMIUnknown( myIntPtr );
   
   // return COM Runtime Wrapper pointer.
   return myIntPtr;
}

public override IntPtr SupportsInterface(ref Guid myGuid)
{
    Console.WriteLine("SupportsInterface method called");
    // Object reference is requested for communication with unmanaged objects
    // in the current process through COM.
    IntPtr myIntPtr = this.GetCOMIUnknown(false);
    // Stores an unmanaged proxy of the object.
    this.SetCOMIUnknown(myIntPtr);
    // return COM Runtime Wrapper pointer.
    return myIntPtr;
}

<SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.Infrastructure)> _
Public Overrides Function SupportsInterface(ByRef myGuid As Guid) As IntPtr
   Console.WriteLine("SupportsInterface method called")
   ' Object reference is requested for communication with unmanaged objects
   ' in the current process through COM.
   Dim myIntPtr As IntPtr = Me.GetCOMIUnknown(False)
   ' Stores an unmanaged proxy of the object.
   Me.SetCOMIUnknown(myIntPtr)
   ' return COM Runtime Wrapper pointer.
   Return myIntPtr
End Function 'SupportsInterface

備註

如果要求 Proxy 進行封送處理，則會 IUnknown 傳回目前 Proxy 實例所代表對象的介面。 IUnknown如果 先前由 SetCOMIUnknown 方法快取 ，則會傳回該實例，否則會傳回新的實例。

如果 Proxy 未要求封送處理，但用於與目前進程中 Unmanaged 對象的通訊，則會傳回 COM 可呼叫包裝函 式 (CCW) ，此程式可用於透過 COM 進行通訊的目前程式。