文件名和目录可以通过path()和fileName()分解,fileName()返回的部分可以通过baseName()和extension()来获得主文件名和扩展文件名,文件的操作日期可以通过created(),lastModified()和lastRead()获取,文件的存取权限可通国isReadable,isWriteable(),isExcutetable()获取,文件的属主可以通过owner(),ownerId,group(),grou...
QString path=QFileDialog::getOpenFileName(this,"open","C:/Users/MSI-NB/Desktop","text(*.txt)"); if(!path.isEmpty()){ //若文件路径不为空 //创建QFile对象并指定路径 QFile file(path); //一定要记得打开文件,并设置读写模式 file.open(QIODevice::ReadOnly); //读取文件内容,一次性全部读...
QString displayString; QFilefile("C:\\Users\\zwc11\\Yeecoh\\log.txt");//目标文件路径 if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug()<<"Can't open the file!"; } while(!file.atEnd()) { QByteArray line = file.readLine(); QStringstr(line); qDebug()<< ...
QFile file(QCoreApplication::applicationDirPath()+"/Yeecoh/log.txt");//新写法,选择要读取的文件,add by Edward,2022-07-01 if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) { //qDebug()<<"Can't open the file!"; } while(!file.atEnd()) { QByteArray line = file.readLine(...
I try to access a simple text file from a Qt-widget application with the QFile class for reading an writing. Reading the file line by line as a string works fine. But opening it ready to write fails. The following code checks if the file exists and tries to set the proper permissions...
void Dialog::showFile(){ Qstring s = QFileDialog::get0penFileName (this, "open file dialog", "/", "C++ files (*.cpp);;C files(*.c);;Head files(*.h)"); fileLineEdit->setText (s); } getOpenFileName 获取用户选择的文件名。
//从文件加载英文属性与中文属性对照表QFilefile(":/propertyname.txt");if(file.open(QFile::ReadOnly)) {//QTextStream方法读取速度至少快百分之30#if0while(!file.atEnd()) { QString line = file.readLine(); appendName(line); }#elseQTextStreamin(&file);while(!in.atEnd()) { ...
QObject::connect(line, &QLineEdit::textChanged, [](constQString& text) { QFilefile("output.txt");if(file.open(QFile::WriteOnly | QFile::Text)) { QTextStreamstream(&file); stream << text; file.close(); } }); The code above will connect alambda expressionto theQLineEdit::textChan...
plainTextEdit->appendPlainText("This is a new line"); clear():清除QPlainTextEdit的所有文本内容。 plainTextEdit->clear(); setReadOnly(bool readOnly):设置QPlainTextEdit是否只读。 plainTextEdit->setReadOnly(true); setMaximumBlockCount(int maximum):设置最大文本块数。当文本块数超过最大值时,旧...
在Qt中,可以使用QFile类来进行文件的读写操作。要写入结束文件,可以按照以下步骤进行: 创建一个QFile对象,并指定要写入的文件路径。QFile file("path/to/file.txt"); 打开文件,使用QIODevice::WriteOnly模式打开文件,表示只写入数据。if (file.open(QIODevice::WriteOnly)) { // 文件打开成功,可以进行写入...