RealProxy.GetCOMIUnknown(Boolean) 方法

public:
 virtual IntPtr GetCOMIUnknown(bool fIsMarshalled);

public virtual IntPtr GetCOMIUnknown(bool fIsMarshalled);

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

abstract member GetCOMIUnknown : bool -> nativeint
override this.GetCOMIUnknown : bool -> nativeint

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

Public Overridable Function GetCOMIUnknown (fIsMarshalled As Boolean) As IntPtr

参数

返回

如果通过 COM 请求对象引用与当前进程中的非托管对象通信，或者请求对象引用以封送到远程位置，则指向 COM 可调用包装器的 指针;如果请求对象引用以封送到远程位置，则指向缓存的或新生成的 IUnknown COM 接口的指针。

属性

SecurityCriticalAttribute

示例

[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

注解

如果请求代理进行封送处理，则 IUnknown 返回由当前代理实例表示的对象接口。 如果方法之前缓存SetCOMIUnknown了某个IUnknown实例，则返回该实例;否则返回一个新实例。

如果请求代理不是封送处理，而是用于与当前进程中非托管对象的通信，则会返回可在当前进程中用于通过 COM 进行通信的 COM 可调用包装器 （CCW）。