Re: IXMLDOMSchemaCollection::add()

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance


> The method returns an error code, which #import-generated smart wrapper
> converts into _com_error exception. Catch the exception, see what the
> error code and error message is.

Error: "Validate failed because the root element had no associated
DTD/schema."

I don't understand this. This error occur in my implementation (Handler
class) of ISAXErrorHandler::error(), but this object is not assigned yet!:

//Create handler class
Handler * pEH = new Handler();

// Load schema from memory (resources) into DOMDocument
IXMLDOMDocument2Ptr domSchema = NULL;
HRESULT hr = domSchema.CreateInstance("Msxml2.DOMDocument.4.0");
BSTR xml = CString((char*)hRes, dwFileLength).AllocSysString();
domSchema->loadXML(xml);
SysFreeString(xml);

ISAXXMLReaderPtr pSAXReader = NULL;
hr = pSAXReader.CreateInstance(__uuidof(MSXML2::SAXXMLReader40));

IXMLDOMSchemaCollection2Ptr pSchema = NULL;
hr = pSchema.CreateInstance(__uuidof(MSXML2::XMLSchemaCache40));

try {
//An exception occur here and next line of code is Handler::error()
pSchema->add(L"", &CComVariant(domSchema));
} catch (_com_error e) {
AfxMessageBox(e.Description());
AfxMessageBox(e.ErrorMessage());
} catch (...) {
AfxMessageBox("Unknown error.");
}

pSAXReader->putFeature(MUS("schema-validation"), VARIANT_TRUE);
pSAXReader->putProperty(MUS("schemas"),
CComVariant(pSchema.GetInterfacePtr()));

//Handler was assigned here! Not before this line.
hr = pSAXReader->putErrorHandler(pEH);


.

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