Basically I have wrote a method to test XQuery in Qt 4.4.
I can not get this thing to return any results!
I dummied up some data in the variable "sSampleData" for testing.

I've tried different XQueries like "doc($internalFile)/html/body/p", but they all return no results. I don't get any errors... just no results.

Do you guys see something glaringly wrong?


Qt Code: 
  1. void QtDemo44::SearchFromString(const QString& sQuery, const QString& sData)
  2. {
  3. 	QString sSampleData = "<html>"
  4. 		"	<body>"
  5. 		"		<p id='test'>I love Jessica</p>"
  6. 		"		<p>Something else</p>"
  7. 		"	</body>"
  8. 		"</html>";
  9.  
  10. 	QBuffer InputDevice;
  11.     InputDevice.setData(sSampleData.toUtf8());
  12.     bool bOpenInput = InputDevice.open(QIODevice::ReadOnly);
  13.  
  14.     if (bOpenInput == false)
  15.     {
  16.     	QMessageBox::warning(this, "Buffer Error", "Could not open buffer");
  17.     	return;
  18.     }
  19.  
  20. 	QXmlQuery xmlQuery;
  21.  
  22. 	QString sNewQuery = "declare variable $internalFile external;\n" + sQuery;
  23. 	xmlQuery.bindVariable("internalFile", &InputDevice);
  24. 	xmlQuery.setQuery(sNewQuery);
  25.  
  26. 	bool bIsValid = xmlQuery.isValid();
  27.  
  28. 	if (bIsValid == true)
  29. 	{
  30. 		// One way
  31. 		//QStringList slResults;
  32. 		//xmlQuery.evaluateTo(&slResults);
  33.  
  34. 		//if (slResults.size() > 0)
  35. 		//{
  36. 		//	QMessageBox::warning(this, "Found something!", "This actually works?");
  37. 		//}
  38.  
  39. 		// Another way
  40. 		QString sResults;
  41. 		QBuffer OutputDevice;
  42. 		OutputDevice.setData(sResults.toUtf8());
  43. 		OutputDevice.open(QIODevice::ReadWrite);
  44. 		QXmlSerializer xmlSerializer(xmlQuery, &OutputDevice);
  45. 		xmlQuery.evaluateTo(&xmlSerializer);
  46.  
  47. 		uiDemo.txtResults->setPlainText(sResults);
  48. 	}
  49. 	else
  50. 	{
  51. 		QMessageBox::warning(this, "XQuery Error", "The query set was not valid");
  52. 	}
  53. }
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