C++ 使用 QXmlStreamReader 读取 XML 文件
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Reading an XML file using QXmlStreamReader
提问by Mouhamed Fakarovic
I want to read an XML file using QXmlStreamReader, but I really don't know where the problem is. My function reads the content of the first tag, but then it stops.
我想使用 读取 XML 文件QXmlStreamReader，但我真的不知道问题出在哪里。我的函数读取第一个标签的内容，但随后停止。
The form of the XML file:
XML文件的格式：
<?xml version="1.0" encoding="utf-8"?>
<student>
<firstName>mina</firstName>
<lastName>jina</lastName>
<grade>13</grade>
</student>
<student>
<firstName>Cina</firstName>
<lastName>fina</lastName>
<grade>13</grade>
</student>
The function:
功能：
void MainWindow::open() {
QFile file(QFileDialog::getOpenFileName(this,"Open"));
if(file.open(QIODevice::ReadOnly)) {
QXmlStreamReader xmlReader;
xmlReader.setDevice(&file);
QList<Student> students;
xmlReader.readNext();
//Reading from the file
while (!xmlReader.isEndDocument())
{
if (xmlReader.isStartElement())
{
QString name = xmlReader.name().toString();
if (name == "firstName" || name == "lastName" ||
name == "grade")
{
QMessageBox::information(this,name,xmlReader.readElementText());
}
}else if (xmlReader.isEndElement())
{
xmlReader.readNext();
}
}
if (xmlReader.hasError())
{
std::cout << "XML error: " << xmlReader.errorString().data() << std::endl;
}
}
}
回答by Mouhamed Fakarovic
The problem was in the form of the XML document. I needed to create a root tag.
问题出在 XML 文档的形式上。我需要创建一个根标签。
The new form of the document is:
文件的新形式是：
<?xml version="1.0" encoding="utf-8"?>
<students>
<student>
<firstName>mina</firstName>
<lastName>jina</lastName>
<grade>13</grade>
</student>
<student>
<firstName>Cina</firstName>
<lastName>fina</lastName>
<grade>13</grade>
</student>
</students>
