Listview in Qt

void MainWindow::_fillListView(QList<QStringList> list){
    QStandardItemModel* model = new QStandardItemModel(list.count(),25,this); //x Rows and 25 Columns
    model->setHorizontalHeaderItem(0, new QStandardItem(QString("Column 1")));
    model->setHorizontalHeaderItem(1, new QStandardItem(QString("Column 2")));
    model->setHorizontalHeaderItem(24, new QStandardItem(QString("Column 25")));
    for(int i = 0; i < list.count() ; i++)
        for(int j = 0; j < list[i].count() ; j++)
            model->setItem(i,j,new QStandardItem(QString(list[i][j])));
    ui->listView->setModel(model);
    /*new QListViewItem
    QStandardItemModel *model = new QStandardItemModel();
    ui->listView->setModel( model );
    QStandardItem *item;
    item = new QStandardItem();
    item->setData( "test1", Qt::DisplayRole );
    item->setData( "test2", Qt::DisplayRole );
    item->setEditable( false );
    model->appendRow( item );
    item = new QStandardItem();
    item->setData( "test1", Qt::DisplayRole );
    item->setData( "test2", Qt::DisplayRole );
    item->setEditable( false );
    model->appendRow( item );*/
   // for(int i=0;i<list.size();i++)
        //ui->tableView//->addItems(list.at(i));
}

ui->treeWidget->setColumnCount(list.count());
    ui->treeWidget->setColumnWidth(0,0);
    QTreeWidgetItem *Head = new QTreeWidgetItem(0);
    for(int i=0;i<list.count();i++){
        Head->setText(i, "?"+QString::number(i));
        switch(i){
            case 0:
                ui->treeWidget->setColumnWidth(0,0);break;
            case 1:
                ui->treeWidget->setColumnWidth(1,200);break;
            case 2:
                ui->treeWidget->setColumnWidth(2,180);break;
            case 4:
                ui->treeWidget->setColumnWidth(4,180);break;
            case 5:
                ui->treeWidget->setColumnWidth(5,300);break;
            default:
                ui->treeWidget->setColumnWidth(i,100);break;
        }
    }
    ui->treeWidget->setHeaderItem(Head);
    ui->treeWidget->setUpdatesEnabled(false);
    for(int i = 0; i < list[0].count() ; i++){
        QTreeWidgetItem *testItem = new QTreeWidgetItem(ui->treeWidget);
        for(int j = 0; j < list.count() ; j++){
            testItem->setText(j, QString(list[j][i]));
        }
        ui->treeWidget->addTopLevelItem(testItem);
    }
    ui->Label_Eintrag->setText("Einträge in der Liste: "+QString::number(list[0].count()));
    ui->treeWidget->setUpdatesEnabled(true);