How to convert xml node data into string in QT [duplicate] - c++

Question

This question already has an answer here:
Reading an XML file using QXmlStreamReader
(1 answer)
Closed 6 years ago.
I have xml file in my local machine. The xml file format is like:
<string>
<Data>
<Name>Sanket</Name>
<Number>0987654321</Number>
<Address>India</Address>
</Data>
<Data>
<Name>Rahul</Name>
<Number>0987654321</Number>
<Address>Maharashtra</Address>
</Data>
</string>
I want to convert this XML file data into String format. Like:
Sanket 0987654321 India
Rahul 0987654321 Maharashtra
What is the easiest way to convert this data in QT using c++.
I am new in that, so please can anyone suggest me some sample code for this?
Thank you in advance.
I tried following code, but that not work for me:
void parseFile()
{
QList<QList<QString> > dataSet;
QString lastError = "";
QFile inFile("test.xml");
if (inFile.open(QIODevice::ReadOnly))
{
QTextStream fread(&inFile);
long totalSize = inFile.size();
QString line;
while(!fread.atEnd())
{
line = fread.readLine();
QList<QString> record = line.split(QString::KeepEmptyParts);
dataSet.append(record);
}
qDebug()<<dataSet;
}else{
lastError = "Could not open "+test.xml+" for reading";
}
}

Answer 1

You could parse the xml elements firstly via QXmlStreamReader and then you can assemble the xml elements into the string how you want.

Answer 2

The problem of you Code is that you only process the text Lines without any xml-syntax processed by the xml class.
You should look at the QtXML classes for which Florent Uguet provided some links.
However I modified the example found here to do what you want (It does that exact thing for your exact input):
#include <QDomDocument>
#include <QFile>
#include <iostream>
#include <QDomNodeList>
int main()
{
QDomDocument doc("mydocument");
QFile file("test.xml");
if (!file.open(QIODevice::ReadOnly))
return 1;
if (!doc.setContent(&file)) {
file.close();
return 1;
}
file.close();
const auto stringTags = doc.elementsByTagName("string");
for(int stringsI = 0; stringsI < stringTags.size(); ++stringsI){
QDomNode stringTag = stringTags.at(stringsI);
for(QDomNode dataTag = stringTag.firstChildElement("Data"); !dataTag.isNull(); dataTag = dataTag.nextSiblingElement("Data")){
for(QDomNode innerTag = dataTag.firstChild(); !innerTag.isNull(); innerTag = innerTag.nextSibling()){
auto val = innerTag.toElement().text();
std::cout << val.toStdString() << " ";
}
std::cout << std::endl;
}
}
return 0;
}
I build it with QtCreator using qmake. For this you should know that you need to put QT += xml in your *.pro file.

Answer 3

Already asked (and with code) : Reading an XML file using QXmlStreamReader
Qt provides a set of classes for handling XML :
http://doc.qt.io/qt-5.7/qtxml-index.html
http://doc.qt.io/qt-5.7/qxmlstreamreader.html
http://doc.qt.io/qt-5.7/qxmlstreamwriter.html
Old C++ classes (not maintained)
http://doc.qt.io/qt-5/qtxml-module.html
Once you have parsed your file using these, you can usually read the individual nodes' inner text or attributes.