IDebugCustomAttributeQuery::IsCustomAttributeDefined

Menentukan apakah atribut kustom yang ditentukan ditentukan.

Sintaks

C#

int IsCustomAttributeDefined(
    string pszCustomAttributeName
);

C++

HRESULT IsCustomAttributeDefined(
    LPCOLESTR pszCustomAttributeName
);

Parameter

pszCustomAttributeName
[di] Nama atribut kustom.

Tampilkan Nilai

Jika atribut kustom ditentukan, mengembalikan S_OK; jika tidak, mengembalikan S_FALSE.

Contoh

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

HRESULT CDebugClassFieldSymbol::IsCustomAttributeDefined(
    LPCOLESTR pszCustomAttribute
)
{
    HRESULT hr = S_FALSE;
    CComPtr<IMetaDataImport> pMetadata;
    mdToken token = mdTokenNil;
    CComPtr<IDebugField> pField;
    CComPtr<IDebugCustomAttributeQuery> pCA;

    ASSERT(IsValidWideStringPtr(pszCustomAttribute));

    METHOD_ENTRY( CDebugClassFieldSymbol::IsCustomAttributeDefined );

    IfFalseGo( pszCustomAttribute, E_INVALIDARG );

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

    IfFailGo( CDebugCustomAttribute::GetTokenFromAddress( m_spAddress, &token) );
    IfFailGo( pMetadata->GetCustomAttributeByName( token,
              pszCustomAttribute,
              NULL,
              NULL ) );
Error:

    METHOD_EXIT( CDebugClassFieldSymbol::IsCustomAttributeDefined, hr );

    if (hr != S_OK)
    {
        hr = S_FALSE;
    }

    return hr;
}

Baca juga

• IDebugCustomAttributeQuery