IDebugCustomAttributeQuery::GetCustomAttributeByName
Retrieves a custom attribute given its name.
HRESULT GetCustomAttributeByName(
LPCOLESTR pszCustomAttributeName,
BYTE* ppBlob,
DWORD* pdwLen
);
int GetCustomAttributeByName(
string pszCustomAttributeName,
ref int[] ppBlob,
out uint pdwLen
);
Parameters
pszCustomAttributeName
[in] Name of the custom attribute.ppBlob
[in,out] Array of bytes that contain the custom attribute data.pdwLen
[out] Length in bytes of the ppBlob parameter.
Return Value
If successful, returns S_OK. If custom attribute does not exist, returns S_FALSE. Otherwise, returns an error code.
Example
The following example shows how to implement this method for a CDebugClassFieldSymbol object that exposes the IDebugCustomAttributeQuery interface.
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;
}