I have an xml file that was generated using c++. so i used it as a model in qml. now as the user is interacting with the App, i want to append to that xml in c++, then reload the xmlModel in qml. i tried these: QString filename= appFolder+"/db/"+xmlFile; if(append == true){ qDebug() << "appending..."; file.open(QIODevice::ReadWrite | QIODevice::Text); QDomDocument doc; doc.setContent(&file); QDomNode root = doc.firstChild(); }else{ qDebug() << "trancating and adding to file.."; file.open(QIODevice::ReadWrite | QIODevice::Truncate | QIODevice::Text); QDomDocument doc("Products"); QDomElement root = doc.createElement("Products"); doc.appendChild(root); } Then i have a loop that should iterate while appending to the roort variable. So if i try to access the variable doc so that i can add elements to it, i get: Error: doc was not declared on the scope. And Error: root was not declared on the scope. But the qDebug is working fine. it is printing the message that it is suppose to print, depending on the variable append . And if i remove the whole if block and use the following, everything work fine, but it truncate the the file which i dnt want. file.open(QIODevice::ReadWrite | QIODevice::Truncate | QIODevice::Text); QDomDocument doc("Products"); QDomElement root = doc.createElement("Products"); doc.appendChild(root); Can anybody tell me where a`im getting things wrong..

Hi Your root and doc only exists within if (xxx) { } // scope ends and all is deleted Just move them above the if(append) so they are not deleted. If you need doc / root in more than one function, you can simply make them member of the class.

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Appending to xml

Solved General and Desktop

21 Posts 4 Posters 8.6k Views 2 Watching

C chawila

@JNBarchan
Thanks,
it was little bit challenging though..
J Online
J Online
JonB

wrote on last edited by

#21

@chawila
Well, I'm sorry but "appending to an XML file" is "a bit challenging", because as you've seen you don't quite want to do that... :)
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