Blank file using QXmlStreamWriter

[sgmurphy19]

I get a blank file using the following code. Can anyone shed some light on why? I know it is writeable as it creates the file and goes into the if statement.

Thanks in advanced!

QString fileName = QFileDialog::getSaveFileName(0, "Save File", "", "XML Files ( *.xml)");

file = new QFile(fileName);
if(file->open(QIODevice::WriteOnly | QIODevice::Text))
{
file->close();
xmlWriter = new QXmlStreamWriter();
xmlWriter->setDevice(file);

xmlWriter->writeStartDocument();
xmlWriter->writeDTD("<!DOCTYPE xbel>");
xmlWriter->writeStartElement("xbel");
xmlWriter->writeAttribute("version", "1.0");
xmlWriter->writeTextElement("Uri", "name", "This is Text");
xmlWriter->writeEndDocument();
}

[jpn]

What if you don't close the file before writing to it?

PS. You don't have to allocate everything on the heap..

[sgmurphy19]

Ignore that line. I put that in to test if anything would change if I did close the file first. Either way it comes out blank

[jpn]

Works for me:

#include <QtGui>
#include <QtXml>
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QString fileName = QFileDialog::getSaveFileName(0, "Save File", "", "XML Files ( *.xml)");
    if (!fileName.isNull())
    {
        QFile file(fileName);
        if (file.open(QIODevice::WriteOnly | QIODevice::Text))
        {
            QXmlStreamWriter xmlWriter(&file);
            xmlWriter.writeStartDocument();
            xmlWriter.writeDTD("<!DOCTYPE xbel>");
            xmlWriter.writeStartElement("xbel");
            xmlWriter.writeAttribute("version", "1.0");
            xmlWriter.writeTextElement("Uri", "name", "This is Text");
            xmlWriter.writeEndDocument();
        }
    }
    return 0;
}

#include <QtGui>
#include <QtXml>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QString fileName = QFileDialog::getSaveFileName(0, "Save File", "", "XML Files ( *.xml)");
    if (!fileName.isNull())
    {
        QFile file(fileName);
        if (file.open(QIODevice::WriteOnly | QIODevice::Text))
        {
            QXmlStreamWriter xmlWriter(&file);
            xmlWriter.writeStartDocument();
            xmlWriter.writeDTD("<!DOCTYPE xbel>");
            xmlWriter.writeStartElement("xbel");
            xmlWriter.writeAttribute("version", "1.0");
            xmlWriter.writeTextElement("Uri", "name", "This is Text");
            xmlWriter.writeEndDocument();
        }
    }
    return 0;
}

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[sgmurphy19]

Thanks jpn,
When I changed my code to constructor statements it worked. Not sure why it didn't like the method approach.