Qt修改xml文件

<taskpackage styleId="styles/2dc70235-e48b-4e11-b074-3c3f773ae1f3" id="3333" type="normal">
    <playvideo isFlash="false">
        <group times="5618" filename="groupList" playTimes="15" startTime="00:00:00">
            <item filename="COM.mp4" filesize="1.92GB" href="resource/daab3.mp4" flv="resource/aab3.mp4"/>
        </group>
    </playvideo>
    <text>欢迎</text>
</taskpackage>

修改id的值。

 

QFile file("we.xml");

QDomDocument doc;

if(!file.open(QIODevice::ReadOnly))

{

qDebug()<<"xxx";

}

if(!doc.setContent(&file))

{

file.close();

qDebug()<<"ttttt";

}

file.close();

QDomNode old_node = doc.firstChild();

qDebug()<<doc.firstChild().toElement().attribute("id");

doc.firstChild().toElement().setAttribute("id", "3333");

qDebug()<<doc.firstChild().toElement().attribute("id")<<"
"<<doc.firstChild().toElement().attribute("startTime");

QDomNode new_node = doc.firstChild();

doc.replaceChild(new_node, old_node);

QFile afile("we.xml");

afile.open(QIODevice::WriteOnly|QIODevice::Truncate);

QTextStream out(&afile);

doc.save(out,4);

afile.close();