[Solved]XML readproblems

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();

}@