假设我的 QTableWidget 看起来像这样:
__| columnname1 | columnname2
1 | name1 | value1
2 | name2 | value2
3 | name3 | value3
4 | name4 | value4
我用这段代码创建的:
ui->tableWidget->setColumnCount(2);
foreach(const QString& key, keys)
{
value = jsonObj.value(key);
ui->tableWidget->sortItems(int (1),Qt::DescendingOrder);
int currRow = ui->tableWidget->rowCount();
ui->tableWidget->setSortingEnabled(false);
ui->tableWidget->insertRow(ui->tableWidget->rowCount());
ui->tableWidget->setItem(currRow, 0, new QTableWidgetItem(key));
ui->tableWidget->setItem(currRow, 1, new QTableWidgetItem(value.toString()));
ui->tableWidget->setHorizontalHeaderLabels({"columnname1", "columnname2"});
ui->tableWidget->setSortingEnabled(true);
ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
}
现在,例如,我有一个新的 name2 值,我该如何替换 name2 所在的整行?
最佳答案
首先,您要为每一行调用一些函数,对于整个表格只需调用一次。相反,您的代码示例应该更像这样:
ui->tableWidget->setColumnCount(2);
ui->tableWidget->setSortingEnabled(false);
ui->tableWidget->setHorizontalHeaderLabels({"columnname1", "columnname2"});
ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);
foreach(const QString& key, keys)
{
value = jsonObj.value(key);
int currRow = ui->tableWidget->rowCount();
ui->tableWidget->insertRow(ui->tableWidget->rowCount());
ui->tableWidget->setItem(currRow, 0, new QTableWidgetItem(key));
ui->tableWidget->setItem(currRow, 1, new QTableWidgetItem(value.toString()));
}
ui->tableWidget->sortItems(int (1),Qt::DescendingOrder);
ui->tableWidget->setSortingEnabled(true);
然后,如果您对“name2”行有一个新的值,您只需要替换该值。您已经知道该怎么做:
// first find the row index of row 'name2':
int rowIdx = -1;
for(int i = 0; i < ui->tableWidget->rowCount(); i++) {
if(ui->tableWidget->item(i, 0)->text() == "name2") {
rowIdx = i;
break;
}
}
if(rowIdx >= 0) {
// then EITHER replace the item:
ui->tableWidget->setItem(rowIdx, 1, new QTableWidgetItem(value.toString()));
// OR replace the data:
ui->tableWidget->item(rowIdx, 1)->setText(value.toString());
}
我没有编译这个示例代码,它可能有拼写错误或错误的函数名称,但你会明白的。
关于c++ - 根据单元格名称替换 QTableWidget 中的一行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56751102/