IDebugCustomAttributeQuery::GetCustomAttributeByName

Mengambil atribut kustom yang diberi namanya.

Sintaks

C#

int GetCustomAttributeByName(
    string    pszCustomAttributeName,
    ref int[] ppBlob,
    out uint  pdwLen
);

C++

HRESULT GetCustomAttributeByName(
    LPCOLESTR pszCustomAttributeName,
    BYTE*     ppBlob,
    DWORD*    pdwLen
);

Parameter

pszCustomAttributeName
[di] Nama atribut kustom.

ppBlob
[masuk,keluar] Array byte yang berisi data atribut kustom.

pdwLen
[out] Panjang dalam byte ppBlob parameter.

Tampilkan Nilai

Jika berhasil, mengembalikan S_OK. Jika atribut kustom tidak ada, mengembalikan S_FALSE. Jika tidak, kembalikan kode galat.

Contoh

Contoh berikut menunjukkan cara menerapkan metode ini untuk objek CDebugClassFieldSymbol yang mengekspos antarmuka IDebugCustomAttributeQuery .

HRESULT CDebugClassFieldSymbol::GetCustomAttributeByName(
    LPCOLESTR pszCustomAttributeName,
    BYTE *pBlob,
    DWORD *pdwLen
)
{
    HRESULT hr = S_FALSE;
    CComPtr<IMetaDataImport> pMetadata;
    mdToken token = mdTokenNil;
    CComPtr<IDebugField> pField;
    CComPtr<IDebugCustomAttributeQuery> pCA;

    ASSERT(IsValidWideStringPtr(pszCustomAttributeName));
    ASSERT(IsValidWritePtr(pdwLen, ULONG*));

    METHOD_ENTRY( CDebugClassFieldSymbol::GetCustomAttributeByName );

    IfFalseGo( pszCustomAttributeName && pdwLen, E_INVALIDARG );

    IfFailGo( m_spSH->GetMetadata( m_spAddress->GetModule(), &pMetadata ) );

    IfFailGo( CDebugCustomAttribute::GetTokenFromAddress( m_spAddress, &token) );
    IfFailGo( CDebugCustomAttribute::GetCustomAttributeByName( pMetadata,
              token,
              pszCustomAttributeName,
              pBlob,
              pdwLen ) );
Error:

    METHOD_EXIT( CDebugClassFieldSymbol::GetCustomAttributeByName, hr );
    return hr;
}

Baca juga

• IDebugCustomAttributeQuery