相反,你应该调用readAll(),或 反复调用read()、readLine()知道没有数据可读为止。如下代码所示,我们使用QTextStream一行一行的读取/proc/modules文件: QFile file("/proc/modules"); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) return; QTextStream in(&file); QString line = in.readLine()...
QFile file("/home/administrator/testdir/test.txt"); //相对或者绝对路径 if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug()<<"Can't open the file!"<<endl; } while(!file.atEnd()) { QByteArray line = file.readLine(); QString str(line); qDebug()<< str; } 1....
file = QFile(QFileInfo(__file__).absolutePath() +'/grades.txt')iffile.open(QFile.ReadOnly): line = file.readLine(200).decode('utf-8') header = split_and_strip(line,',') model.setHorizontalHeaderLabels(header) row =0whilefile.canReadLine(): line = file.readLine(200).decode('utf...
The following example reads a text file line by line:QFile file("in.txt"); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) return; while (!file.atEnd()) { QByteArray line = file.readLine(); process_line(line); }
Using Streams to Read Files The next example usesQTextStreamto read a text file line by line: QFilefile("in.txt");if(!file.open(QIODevice::ReadOnly|QIODevice::Text))return;QTextStreamin(&file);while(!in.atEnd()) {QStringline=in.readLine(); process_line(line); } ...
The following example reads a text file line by line: QFilefile("in.txt");if(!file.open(QIODevice::ReadOnly|QIODevice::Text))return;while(!file.atEnd()) {QByteArrayline=file.readLine(); process_line(line); } TheQIODevice::Textflag passed toopen() tells Qt to convert Windows-style...
boolStreamMail::LoadFile(constQString file) {///qFatal(" unable to read ... ");boolfilled =false;if(clear()) { QFile *f =newQFile(file);if(f->exists()) {///if(f->open(QIODevice::ReadOnly)) {/// read line by lineif(f->isReadable()) { linenr ...
QFile file("in.txt"); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) return; while (!file.atEnd()) { QByteArray line = file.readLine(); process_line(line); } QIODevice::Text flag传递给 open() ,其告诉Qt将Windows风格的换行符 ("\r\n") 转换为 C++风格的换行符("\...
Opens the file specified by the file name currently set, using the mode \e m. Returns TRUE if successful, otherwise FALSE. The mode parameter \e m must be a combination of the following flags: <ul> <li>\c IO_Raw specified raw (non-buffered) file access. <li>\c IO_ReadOnly opens...
QFileDevice::ExeUser 0x0100 Executable by the user. QFileDevice::ReadGroup 0x0040 Readable by the group. QFileDevice::WriteGroup 0x0020 Writable by the group. QFileDevice::ExeGroup 0x0010 Executable by the group. QFileDevice::ReadOther 0x0004 Readable by anyone. QFileDevice::WriteOther...