ui->tableWidget->setContextMenuPolicy (Qt::CustomContextMenu);
    connect(ui->tableWidget,SIGNAL(customContextMenuRequested(QPoint)),this,SLOT(show_menu(QPoint)));
    void file_manager::show_menu(const QPoint pos)
    {
    //设置菜单选项
    QMenu menu = new QMenu(ui->tableWidget);
    QAction     pnew = new QAction(“删除当前行”,ui->tableWidget);
    QAction *pnew1 = new QAction(“删除全部”,ui->tableWidget);
    menu->addAction(pnew);
    menu->addAction(pnew1);
    menu->move (cursor ().pos ());

    1. //获得鼠标点击的x，y坐标点<br />    int x = pos.x ();<br />    int y = pos.y ();<br />    QModelIndex index = ui->tableWidget->_indexAt_ (QPoint(x,y));<br />    int row  = index.row ();//获得QTableWidget列表点击的行数<br />    Selected_Current_Row=row;<br />    qDebug()<<tr("row==")<<row<<ui->tableWidget->rowCount();<br />    if(ui->tableWidget->rowCount()>=1)<br />    {<br />        menu->show ();<br />        connect (pnew,SIGNAL(triggered()),this,SLOT(del_wtc()));<br />        connect (pnew1,SIGNAL(triggered()),this,SLOT(del_wt()));<br />    }<br />    else<br />    {<br />        QMessageBox::warning(NULL,"警告","没有数据可选择",QMessageBox::Ok);<br />    }<br />}<br />void file_manager::del_wtc()<br />{<br />    if(Selected_Current_Row<0)<br />    {<br />        QMessageBox::warning(NULL,"警告","没有数据可选择",QMessageBox::Ok);<br />    }<br />    else{<br />        QMessageBox message(QMessageBox::NoIcon, QString::fromLocal8Bit("提示"),<br />                            tr("是否删除本行数据?"),<br />                            QMessageBox::Yes | QMessageBox::No, NULL);<br />        if(message._exec_() == QMessageBox::Yes)<br />            ui->tableWidget->removeRow(Selected_Current_Row);<br />    }<br />}<br />void file_manager::del_wt()<br />{<br />    int i;<br />    QMessageBox message(QMessageBox::NoIcon, QString::fromLocal8Bit("提示"),<br />                        tr("是否删除所有数据?"),<br />                        QMessageBox::Yes | QMessageBox::No, NULL);<br />    if(message._exec_() == QMessageBox::Yes){
    3.     ui->tableWidget->clearContents();<br />        for(i=0;i<=ui->tableWidget->rowCount()+1;i++)<br />            ui->tableWidget->removeRow(0);
    5. }<br />}