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Xml parsing using QXmlStreamReader



  • Hello,

    I'm trying to parse an xml file using QXmlStreamReader.

    Here my xml file (in my project directory:

    <?xml version="1.0" encoding="UTF-8"?>
    <!--example with no DTD-->
    <root>
        <childA>text1</childA>
        <childA>text2</childA>
        <childB>text3</childB>
        <childA>text4</childA>
    </root>
    

    And here an example code :

    QFile file("param.xml");
    if(!file.open(QFile::ReadOnly | QFile::Text)){
      qDebug() << "Cannot read file" << file.errorString();
    }
    
    QXmlStreamReader reader(&file);
    
    if (reader.readNextStartElement()) {
      if (reader.name() == "root"){
          while(reader.readNextStartElement()){
              if(reader.name() == "childA"){
                  QString s = reader.readElementText();
                  qDebug(qPrintable(s));
              }
              else
                  reader.skipCurrentElement();
          }
      }
      else
          reader.raiseError(QObject::tr("Incorrect file"));
    }
    else{
        if(reader.hasError()) qDebug()<< reader.errorString();
    }
    

    execution return error:

    "Premature end of document."
    

    Encoding is verified.
    Another strange thing occure when i'm trying to use another xml file with the same content on my project directory (test.xml) .
    Just change the line :

    QFile file("test.xml");
    

    In this case my prog refuse to open the file :

    Cannot read file "No such file or directory"
    QIODevice::read (QFile, "test.xml"): device not open
    "Premature end of document."
    

    Both files are included on my project, are encoded UTF-8, have the same content... juste not the same name....

    Any ideas?


  • Lifetime Qt Champion

    Hi and welcome to devnet,

    Your path to test.xml is relative so the file should be beside your executable. Currently your executable is located in a shadow build dir. So for your test you can use an absolute path or copy the file in the shadow build dir.