我目前正在尝试将一些QLineEdits的值放入XML文档中。我为此使用QDom。这是我的代码:
void MainWindow::writeSysConf(const QString &arg1){
QFileDialog fdExport;
QString filename = fdExport.getSaveFileName(
this,
tr("SysConf-Konfig speichern"),
arg1,
tr("Konfigurationsdatei (*.xml)") );
if( !filename.isNull()) {
QFile::remove(filename);
if ( !filename.endsWith(".xml", Qt::CaseInsensitive))
filename += ".xml";
QFile file(filename);
file.open(QIODevice::WriteOnly | QIODevice::Text);
QTextStream outPut(&file);
QDomDocument xmlDocument;
QDomElement sysConfigElement = xmlDocument.createElement("SYSTEMCONFIGURATION");
QDomElement calibElement = xmlDocument.createElement("CALIB");
QDomElement crescendoElement = xmlDocument.createElement("CRESCENDO");
QDomElement swellsElement = xmlDocument.createElement("SWELLS");
sysConfigElement.appendChild(calibElement);
calibElement.appendChild(crescendoElement);
QDomNode minNode = xmlDocument.createElement(ui->lineEdit_2->text);
QDomNode maxNode = xmlDocument.createElement(ui->lineEdit_3->text);
QDomNode stepsNode = xmlDocument.createElement(ui->lineEdit_4->text);
QDomNode updateMsNode = xmlDocument.createElement(ui->lineEdit_5->text);
crescendoElement.appendChild(minNode);
crescendoElement.appendChild(maxNode);
crescendoElement.appendChild(stepsNode);
crescendoElement.appendChild(updateMsNode);
calibElement.appendChild(swellsElement);
xmlDocument.appendChild(sysConfigElement);
outPut << xmlDocument.toString(4);
}
}
但是,在这四行:
QDomNode minNode = xmlDocument.createElement(ui->lineEdit_2->text);
QDomNode maxNode = xmlDocument.createElement(ui->lineEdit_3->text);
QDomNode stepsNode = xmlDocument.createElement(ui->lineEdit_4->text);
QDomNode updateMsNode = xmlDocument.createElement(ui->lineEdit_5->text);
它说我会尝试使用未解析的重载函数类型将其放入我的QDomNodes中。但是,据我所知,QLineEdits返回一个QString。那么问题出在哪里?
固定它。您只需要在ui-> lineEdit->文本后面添加一个(),因为它是一个函数。所以我的方式应该是这样的:
QDomNode minNode = xmlDocument.createElement(ui->lineEdit_2->text());
QDomNode maxNode = xmlDocument.createElement(ui->lineEdit_3->text());
QDomNode stepsNode = xmlDocument.createElement(ui->lineEdit_4->text());
QDomNode updateMsNode = xmlDocument.createElement(ui->lineEdit_5->text());