QFileDialog

来源：互联网发布：海量数据存储 redis 编辑：程序博客网时间：2024/05/18 02:23
常用的打开，保存文件对话框：
#include <QDateTime>#include <QFileDialog>#include <QTextCodec>#include <QTextStream>DialogTest::DialogTest(QWidget *parent, Qt::WFlags flags): QDialog(parent, flags){ui.setupUi(this);/////设置字符编码QTextCodec *codec = QTextCodec::codecForName("GBK");QTextCodec::setCodecForLocale(codec);QTextCodec::setCodecForCStrings(codec);QTextCodec::setCodecForTr(codec);      connect(ui.m_saveBtn,SIGNAL(clicked()),this,SLOT(saveDialog()));connect(ui.m_openBtn,SIGNAL(clicked()),this,SLOT(openDialog()));}DialogTest::~DialogTest(){}void DialogTest::saveDialog(){QString strBuf("write file\r\n成功");QString defaultFileName =tr("文件名%1").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd-hh-mm-ss"));QString fileName=QFileDialog::getSaveFileName(this,tr("保存文件"),defaultFileName,tr("文件类型(*.txt)"));if(fileName!=NULL){QFile file(fileName);if(file.open(QFile::WriteOnly | QFile::Text)){QTextStream filestream(&file);int index=0;while(index<strBuf.length()){filestream<<strBuf[index];++index;}file.close();QMessageBox::about(this,tr("保存"),tr("保存文件成功"));}}}void DialogTest::openDialog(){QString fileName=QFileDialog::getOpenFileName(this,tr("打开文件"),".",tr("文件类型(*.txt)"));if(fileName!=NULL){QFile file(fileName);if(file.open(QFile::ReadOnly | QFile::Text)) {QTextStream stream(&file);QString strText;strText.clear();while (!stream.atEnd() ) {strText+=stream.readLine(); }file.close();QMessageBox::about(this,tr("文件内容"),strText);}}}