RealProxy.GetCOMIUnknown(Boolean) 方法

定义

命名空间:

System.Runtime.Remoting.Proxies

程序集:

mscorlib.dll

请求对当前代理实例所表示的对象的非托管引用。

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

参数

fIsMarshalled

Boolean

如果请求该对象引用是为了封送到远程位置，则为 true；如果请求该对象引用是为了通过 COM 与当前进程中的非托管对象进行通信，则为 false。

返回

IntPtr

nativeint

如果请求该对象引用是为了通过 COM 与当前进程中的非托管对象进行通讯，则为指向 COM 可调用包装器的指针；如果请求该对象引用是为了封送到远程位置，则为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 对象的接口。 IUnknown如果 方法之前缓存了 SetCOMIUnknown ，则返回该实例;否则返回新实例。

如果请求代理不是为了封送处理，而是请求与当前进程中的非托管对象通信，则返回 COM 可调用包装器 (CCW) （可在当前通过 COM 进行通信的进程中使用）。