class DomXML { public: DomXML(); static void createXML(QString filePath); //创建xml空文件 static void appendXML(QString filepath,QStringList list); //追加子节点 static void writeXML(QDomDocument &doc,QDomElement &root,QStringList &list); //写入XML数据 static void readXML(QString filepat...
QFile file(filename);if(!file.open(QFile::ReadOnly |QFile::Text)) { std::cerr<<"Error: Cannot read file"<<qPrintable(filename)<<":"<<qPrintable(file.errorString())<<std::endl; } QXmlStreamReader xmlReader(&file); xmlReader.readNext();while(!xmlReader.atEnd()) {if(xmlReader...
一、QFile 对文件进行读写操作1、 QFile进行读写操作2、 QFile file( path文件路径)3、 读(1) file.open(打开方式) QIODevice::readOnly(2) 全部读取file.readAll() 按行读 file.readLine() atend()判断是否读到文件尾(3)默认支持编码格式 utf-8(4)利用编码格式类 指定格式 QTextCod ...
file.open(QIODevice::ReadOnly); QXmlStreamReader xmlReader(&file); while(!xmlReader.atEnd()){ if(xmlReader.tokenType() == QXmlStreamReader::StartElement){ if(xmlReader.name() == "item"){ xmlReader.readNext(); QString name = xmlReader.readElementText(); xmlReader.readNext(); QSt...
xml.readNext(); … // do processing } if (xml.hasError()) { … // do error handling } QXmlStreamReader使用了递增式的解析器,适合于在整个XML文档中查找给定的标签、读入无法放入内存的大文件以及处理XML的自定义数据。每次QXmlStreamReader的readNext()函数调用,解析器都会读取下一个标记,按照返回的...
QFile file(dir.filePath("test.txt"));// ".../tmp/test.txt"if(!file.open(QIODevice::ReadWrite)) qWarning("Cannot create the file %s", file.fileName()); }// 获取目录下文件的信息并按文件由小到大进行排列QDir dirLocal; dirLocal.setFilter(QDir::Files | QDir::Hidden | QDir::NoSym...
"Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)" 具体用法: 代码语言:javascript 复制 voidFileDialogWin::on_browseButton_clicked(){//[1]打开文件对话框QString filePath=QFileDialog::getOpenFileName(this,"打开文件","D:/Qt/qt_gz2057_workspace/DAY4/cpp_demo6_qfiledia...
(constQString& fileName, QXmlStreamReader& xmlReader){QFileconfigFile(fileName);if(configFile.open(QFile::ReadOnly | QFile::Text) ==false)throwruntime_error(string("Failed to open file: ") + configFile.errorString().toStdString()); xmlReader.setDevice(&configFile);if(xmlReader.read...
1 Qt Save XML File Automaticly 1 Writing to file doesn’t work in Qt5/Qml 4 "QIODevice::write: device not open" when file is open 4 QFile. Device not open 1 QIODevice::read (QProcess): device not open 1 QIODevice::read(QFile, path): device not open ...
然后可以通过调用write()写入进程的标准输入,并通过调用read()、readLine()和getChar()读取标准输出。因为QProcess继承了QIODevice,所以它也可以用作QXmlReader的输入源,或者用于生成要使用QNetworkAccessManager上传的数据。当进程退出时,QProcess重新进入NotRunning状态(初始状态),并发出finished()。finished()信号提供...