DispatchWrapper Klasse

Definition

public ref class DispatchWrapper sealed

[System.Obsolete("DispatchWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
public sealed class DispatchWrapper

public sealed class DispatchWrapper

[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public sealed class DispatchWrapper

[<System.Obsolete("DispatchWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")>]
type DispatchWrapper = class

type DispatchWrapper = class

[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Serializable>]
type DispatchWrapper = class

Public NotInheritable Class DispatchWrapper

Vererbung

Object

DispatchWrapper

Attribute

ObsoleteAttribute ComVisibleAttribute SerializableAttribute

Hinweise

Wird verwendet, um Objekte zu umschließen, die der Marshaler als ein VT_DISPATCHMarshaler marshallen soll. Dieser Wrapper erzwingt, dass Objekte als VT_DISPATCHgemarstet werden. Wenn das Objekt nicht unterstützt IDispatch wird, wird eine Ausnahme ausgelöst.

void MyMethod(Object^ o);

void DoWrap()
{
    Object^ o = gcnew MyObject();
    MyMethod(o);                        // passes o as VT_UNKNOWN
    MyMethod(gcnew DispatchWrapper(o)); // passes o as VT_DISPATCH

    //...
}

void MyMethod(Object o);

public void DoWrap()
{
    Object o = new MyObject();
    MyMethod(o);                      // passes o as VT_UNKNOWN
    MyMethod(new DispatchWrapper(o)); // passes o as VT_DISPATCH

    //...
}

Sub MyMethod(o As Object)
    ' handle object ...
End Sub

Public Sub DoWrap()
    Dim o As Object = new MyObject()
    MyMethod(o)                      ' passes o as VT_UNKNOWN
    MyMethod(new DispatchWrapper(o)) ' passes o as VT_DISPATCH

    '...
End Sub

Weitere Informationen finden VT_DISPATCHSie in der vorhandenen Dokumentation VARENUM::VT_DISPATCH in der MSDN Library.