IMFAttributes::CopyAllItems Method

Artikel
07/27/2011

Copies all of the attributes from this object into another attribute store.

Syntax

HRESULT CopyAllItems(
  [in]  IMFAttributes *pDest
);

Parameter

pDest [in]
A pointer to the IMFAttributes interface of the attribute store that receives the copy.

Rückgabewert

Ist Methode erfolgreich, wird "S_OK" zurückgegeben. Andernfalls wird ein HRESULT-Fehlercode zurückgegeben.

Hinweise

This method deletes all of the attributes originally stored in pDest.

This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:

Windows XP mit Service Pack 2 (SP2) und höher.
Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (Oktober 2006 Updaterollup für Windows XP Media Center Edition) installed.

Beispiele

To copy a single attribute rather than all of the attributes, you can use the following code:

HRESULT CopyAttribute(IMFAttributes *pFrom, IMFAttributes *pTo, REFGUID guidKey)
{
    PROPVARIANT val;

    HRESULT hr = pFrom->GetItem(guidKey, &val);

    if (SUCCEEDED(hr))
    {
        hr = pTo->SetItem(guidKey, val);
        PropVariantClear(&val);
    }
    else if (hr == MF_E_ATTRIBUTENOTFOUND)
    {
        hr = S_OK;
    }
    return hr;
}

Anforderungen

Mindestens unterstützter Client	Windows Vista
Mindestens unterstützter Server	Windows Server 2008
Header	Mfobjects.h (include Mfidl.h)
Bibliothek	Mfuuid.lib

Siehe auch

IMFAttributes

Attributes and Properties

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