[Solved]XML readproblems

toho71

I got an Xml File and I try to read it.
But my loop is just running 1 time.

Any suggestions
My Code
@
int i = 0;
int d = 0;
int k = 0;

if (in.open(QIODevice::ReadOnly))
{
    QXmlStreamReader s(&in);

    i++;

    while (!s.atEnd())
    {
        s.readNext();
        qDebug() <<"LineNumber: " << s.lineNumber();
        if (s.isStartElement() && s.name() == "en_class")

        {
            k++;
            qDebug() << s.name();
            qDebug() << s.readElementText();
        }
        d++;

    }
}
qDebug() << "i = " << QString::number(i);
qDebug() << "d = " << QString::number(d);
qDebug() << "k = " << QString::number(k);@

JohanSolo

Well, without any example of what your XML file contains it will be difficult for anybody to help you...

toho71

Sorry here are som of the xml file

@
<?xml version="1.0" encoding="UTF-8" ?>
<root>
<version>0.2</version>
<mains>
<main>
<main_id>2</main_id>

<en_main>
&lt;![CDATA[ Automotive]]>

</en_main>

<en_class_title>
<![CDATA[ Make]]>
</en_class_title>

<sections>
<section>
<section_id>1</section_id>
<en_section>
@

etc..
etc..----

[EDIT: fixed code formatting, Volker]

JohanSolo

First of all in the XML example you're giving there is no element which name is "en_class".
Then, what if you add these lines after you loop :

if ( s.hasError() )
{
  qDebug() << s.errorString();
  qDebug() << "at line " << s.lineNumber() << ", column " << s.columnNumber();
  qDebug() << "Error type " << s.error();
}

toho71

thank you
there are elements but they are further down in the xml file

Here is the result after your rows
"Premature end of document."
at line 1 , column 0
Error type 4

I will search this error but if you have an answer to it I will be happy

JohanSolo

Look at this: it seems that your input is not complete when you are trying to parse the XML document.

toho71

Thanks
I'll Try this tomorrow.

I thought this would be enough
@QXmlStreamReader s(&in);@

JohanSolo

Well, it depends what is you in object. If it's a file on disk, I agree with you. However if you're downloading the file for instance with QNetworkAccessManager / QNetworkReply, you better wait till the file is completely downloaded and written.

I'm pretty sure there's an example of this somewhere...

Edit : found what I wanted, when I was trying to do such a thing this thread and this one as well helped me.

toho71

I got the file in the same folder as the application on the disk but I will try with another xml file

toho71

This is the problem

@s.readElementText();@
anyone
pls

JohanSolo

The readElementText() method uses readElementText( ErrorOnUnexpectedElement ).
As far as I understand this error means that your file (assuming the reading of the full file is OK) doesn't contain valid XML: it tries to find the corresponding EndElement till the end of the file but cannot...

Why don't you start trying to read a simple xml, like this one?

toho71

I did that with a simple xml file and I tried your exampel to but same error.
This is a big problem now.

JohanSolo

It means that you're using the readElementText in a wrong way... I'm afraid I cannot help you much more than I already tried. I'm not a big QXmlStreamReader user.

toho71

thank you for your help.
Is it easier to use sax or dom to get the values in the xml

toho71

Got it to work

@void MainWindow::init()
{

//QFile file&#40;"C:/testprojekt/filesXML/cache.xml"&#41;;
//QFile file&#40;"C:/testprojekt/filesXML/parts.xml"&#41;;
 QFile file&#40;"C:/testprojekt/filesXML/simple.xml"&#41;;
if (file.exists())
    qDebug() << file.fileName();
else
    qDebug() << "NO " + file.fileName();

file.open(QIODevice::ReadOnly);

    QXmlStreamReader xml_stream(&file);
    while (!xml_stream.atEnd() && !xml_stream.hasError())
    {
        if (xml_stream.isStartElement() && xml_stream.name() =="description")

             ui->textBrowser->append( + "<" + xml_stream.name().toString()
                                     + ">" + xml_stream.readElementText());

        xml_stream.readNext();
    }

 ui->textBrowser->append("-------------------------");


 xml_stream.clear();
 file.close();

}@