Parse xml file using QStreamReader

[Gary.zhang]

Hello everybody,

I'm trying to parse a Xml file using QStreamReader, first time, I put the code in the main function like this:

QFile *file = new QFile(":/source/qk.xml");
       //Test the qk.xml is opened or not..
       if(!file->open(QIODevice::ReadOnly | QIODevice::Text))
       {
          QMessageBox :: information(NULL,"XML-information","Xml open faile.",
                                     QMessageBox::Yes | QMessageBox :: No,
                                     QMessageBox::Yes);
       }
 
       QXmlStreamReader xml(file);
 
       while(!xml.atEnd())
       {
          if(xml.isStartElement() && xml.name()=="salary")
          {
            QXmlStreamAttributes attrs = xml.attributes();
            //---
            QStringRef fName = attrs.value("normalsalary");
			QStringRef sName = attrs.value("otsalary");
 
             if(fName.isEmpty())
				{
				  xml.readNext();
				  continue;
				}
             QString bb="Normal-Salary is ";
             bb.append(fName.toString());
             bb.append(",OT-Salary is ");
             bb.append(sName.toString());
             QMessageBox::information(NULL,"XML-information",bb,QMessageBox::Ok);
          }
          else if(xml.isEndElement() && xml.name() == "persons") 
          {
		    //if EndElement is persons then stop the loop and create UI 
          }
          xml.readNext();
       }
     */

QFile *file = new QFile(":/source/qk.xml");
       //Test the qk.xml is opened or not..
       if(!file->open(QIODevice::ReadOnly | QIODevice::Text))
       {
          QMessageBox :: information(NULL,"XML-information","Xml open faile.",
                                     QMessageBox::Yes | QMessageBox :: No,
                                     QMessageBox::Yes);
       }

       QXmlStreamReader xml(file);
     
       while(!xml.atEnd())
       {
          if(xml.isStartElement() && xml.name()=="salary")
          {
            QXmlStreamAttributes attrs = xml.attributes();
            //---
            QStringRef fName = attrs.value("normalsalary");
			QStringRef sName = attrs.value("otsalary");

             if(fName.isEmpty())
				{
				  xml.readNext();
				  continue;
				}
             QString bb="Normal-Salary is ";
             bb.append(fName.toString());
             bb.append(",OT-Salary is ");
             bb.append(sName.toString());
             QMessageBox::information(NULL,"XML-information",bb,QMessageBox::Ok);
          }
          else if(xml.isEndElement() && xml.name() == "persons") 
          {
		    //if EndElement is persons then stop the loop and create UI 
          }
          xml.readNext();
       }
     */

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the reference xml file like this:
<?xml version="1.0" encoding="UTF-8" ?>
<setting>

<salary normalsalary="800" otsalary="1500" />

</setting>
until here,all the thing works prefectly, and then I put the Parse function in a class named XmlManager,However ,when I test the Class, It return me an error -"Premature end of document"
there is the fallow class function GetSettingValue()

QString XmlManager::GetSettingValue(QString mothernode, QString childnode)
{
 
    QFile *file = new QFile(":/source/qk.xml");
 
       QXmlStreamReader xml(file);
       QString ww;
 
 
       while(!xml.atEnd())
       { 
          if(xml.isStartElement() && xml.name()=="salary")
          {
            QXmlStreamAttributes attrs = xml.attributes();
            //---
            QStringRef fName = attrs.value("normalsalary");
	    QStringRef sName = attrs.value("otsalary");
            i=1000;
             if(fName.isEmpty())
				{
				  xml.readNext();
				  continue;
				}
          }
          else if(xml.isEndElement() && xml.name() == "persons") 
          {
		    //if EndElement is persons then stop the loop and create UI 
          }
          xml.readNext();
       }
       ww=xml.errorString();
       return ww;
}

QString XmlManager::GetSettingValue(QString mothernode, QString childnode)
{
  
    QFile *file = new QFile(":/source/qk.xml");
   
       QXmlStreamReader xml(file);
       QString ww;

       
       while(!xml.atEnd())
       { 
          if(xml.isStartElement() && xml.name()=="salary")
          {
            QXmlStreamAttributes attrs = xml.attributes();
            //---
            QStringRef fName = attrs.value("normalsalary");
	    QStringRef sName = attrs.value("otsalary");
            i=1000;
             if(fName.isEmpty())
				{
				  xml.readNext();
				  continue;
				}
          }
          else if(xml.isEndElement() && xml.name() == "persons") 
          {
		    //if EndElement is persons then stop the loop and create UI 
          }
          xml.readNext();
       }
       ww=xml.errorString();
       return ww;
}

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can any body give me a suggestion? Thanks.

---

Added after 42 minutes:

Sorry everybody, I found i make a stupid question, the reason I can't Parse the xml's context using a class is that ,I just never open the file , which I just forgot 'file->open..' ,,Oh,It waste me a whole day.....