QXMLQuery problems
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I just want to run an XQuery expression on string containing XML and then get the result again as a string. However looking at the QtXmlQuery documentation it is not entirely clear to me how to use it. I tried to write a simple example to test it.
@#include <iostream>
#include <QtCore>
#include <QtXML>
#include <QtXmlPatterns>class MessageHandler: public QAbstractMessageHandler
{
virtual void handleMessage(QtMsgType type,
const QString &description,
const QUrl &identifier,
const QSourceLocation &sourceLocation)
{
qDebug() << "Error: " << description << " at line " << sourceLocation.line()
<< " char " << sourceLocation.column() << ".";
}
};int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
// app.exec();QString xmlInput = "<?xml version='1.0'?><root><data>hello</data></root>";
QXmlQuery query;MessageHandler messageHandler;
query.setMessageHandler(&messageHandler);
// According to the Qt docs use QVariant to bind a string here.
query.bindVariable("inputDocument", QVariant(xmlInput));// Do I need to declare the variable here?
query.setQuery("declare variable $inputDocument external; doc($inputDocument)//data");if(query.isValid()) {
QXmlResultItems resultItems;
query.evaluateTo(&resultItems);
QXmlItem item = resultItems.next();while(!item.isNull()) {
QVariant value = item.toAtomicValue();
qDebug() << "Got Result: " << value;
item = resultItems.next();
}} else {
qDebug() << "Invalid Query!";
}std::cin.get();
return 0;
}
@However I always get the following error (in German, because my VS is German):
@Error: "<html ><body><p>Error opening c:/.../XQueryTester/Debug/<: Die Synta
x f³r den Dateinamen, Verzeichnisnamen oder die Datentrõgerbezeichnung ist falsc
h.</p></body></html>" at line -1 char -1 .@It says the syntax for file names or directory names is wrong. I have no idea why this happens, I didn't try to open any file??
