打开文件:
void Notepad::on_actionOpen_triggered()
{
QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), QString(),
tr("Text Files (*.txt);;C++ Files (*.cpp *.h)")); if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly)) {
QMessageBox::critical(this, tr("Error"), tr("Could not open file"));
return;
}
QTextStream in(&file);
ui->textEdit->setText(in.readAll());
file.close();
}
}
保存文件:
void Notepad::on_actionSave_triggered()
{
QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"), QString(),
tr("Text Files (*.txt);;C++ Files (*.cpp *.h)")); if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::WriteOnly)) {
// error message
} else {
QTextStream stream(&file);
stream << ui->textEdit->toPlainText();
stream.flush();
file.close();
}
}
}