Read a specific tag in xml

[Nathan Miguel]

In summary, I created a program in python for it to create an xml with system information, but I can not seem to make it read a specific tag of the file. My attempts were using QDom and QXmlStreamReader

XMLFILE

<root><cpuname name="namecpu">Intel(R) Pentium(R) CPU G4400 @ 3.30GHz</cpuname><cpuvendor name="cpucorp">GenuineIntel</cpuvendor><gpuname name="gputag">GeForce GTX 750 Ti</gpuname><gpuvendor name="gpucorp">NVIDIA Corporation</gpuvendor></root>

FUNCTION CPP

QString systeminfo::getCpuName()
{
    QString rootDir = QDir::currentPath();
    QString xmlDir = "/sysinfo/system.xml";
    QDomDocument docxml;
    QString test;
    QFile xmlread;
    xmlread.setFileName(rootDir+xmlDir);

    test = "head";

    QXmlStreamReader reader(&xmlread);
    if (xmlread.open(QIODevice::ReadOnly))
    {
        if (docxml.setContent(&xmlread)){ //Open xml with success
            //Read specifc tag xml
            test = "xml loaded with success"; //the program returned this string successfully now only missing I need to explain to me how I can read xml
        }

    }

    return test;
}

[SGaist]

Hi,

Do you mean QDomDocument::elementsByTagName ?

[Nathan Miguel]

@SGaist I already tried to use this face but I did not understand how it works

[KroMignon]

@Nathan-Miguel Have you tried this:

QString systeminfo::getCpuName()
{
    QString rootDir = QDir::currentPath();
    QString xmlDir = "/sysinfo/system.xml";
    QDomDocument docxml;
    QString test;
    QFile xmlread;
    xmlread.setFileName(rootDir+xmlDir);

    test = "head";

    QXmlStreamReader reader(&xmlread);
    if (xmlread.open(QIODevice::ReadOnly))
    {
        if (docxml.setContent(&xmlread)){ //Open xml with success
            test = "xml loaded with success"; 
            //Read specifc tag xml
            auto nodes = dom.elementsByTagName("cpuname");
            for(int i = 0; i < nodes.count(); i++)
            {
                QDomNode elm = nodes.at(i);
                if(elm.isElement())
                {
                    test = QStringLiteral("%1 = %2").arg(elm.toElement().tagName(), elm.toElement().text());
                }
            }
        }
    }

    return test;
}

[Nathan Miguel]

@KroMignon said in Read a specific tag in xml:

rootDir+xmlDir

Yes I had tried this in the forum pile that I looked for

[Nathan Miguel]

@Nathan-Miguel if this helps solve the problem

PROGRAM DIRECTORY: E:\Git\Denoiser-Script\QML_C++\build-Denosier-Desktop_Qt_5_12_3_MSVC2017_64bit2-Debug\debug

XML DIRECTORY: E:\Git\Denoiser-Script\QML_C++\build-Denosier-Desktop_Qt_5_12_3_MSVC2017_64bit2-Debug\debug\sysinfo\system.xml

[SGaist]

Not really, these are only paths.

Did you meant to upload the XML file content ?

[KroMignon]

@Nathan-Miguel said in Read a specific tag in xml:

PROGRAM DIRECTORY: E:\Git\Denoiser-Script\QML_C++\build-Denosier-Desktop_Qt_5_12_3_MSVC2017_64bit2-Debug\debug
XML DIRECTORY: E:\Git\Denoiser-Script\QML_C++\build-Denosier-Desktop_Qt_5_12_3_MSVC2017_64bit2-Debug\debug\sysinfo\system.xml

In your code extract you have hard coded the path and with you output it should be:

QString systeminfo::getCpuName()
{
    QString rootDir = qApp->applicationDirPath(); // QDir::currentPath() != not application path
    QString xmlDir = "/sysinfo/system.xml";
    QDomDocument docxml;
    QString test;
    QFile xmlread;
    xmlread.setFileName(rootDir+xmlDir);

    test = "head";

    if (xmlread.open(QIODevice::ReadOnly))
    {
        QXmlStreamReader reader(&xmlread);
        if (docxml.setContent(&xmlread)){ //Open xml with success
            test = "xml loaded with success";
            //Read specifc tag xml
            auto nodes = docxml.elementsByTagName("cpuname");
            for(int i = 0; i < nodes.count(); i++)
            {
                QDomNode elm = nodes.at(i);
                if(elm.isElement())
                {
                    test = QStringLiteral("%1 = %2").arg(elm.toElement().tagName(), elm.toElement().text());
                }
            }
        }
    }

    return test;
}

==> my output with this code and your XML document is: