QtableWidget and numbers of row

[VitaliBR]

I Have a qtableWidget and must delete all existing rows when click a button, I am trying as follows, but it only deletes one row at a time

for (int i = 0; i < ui.tableWidget->rowCount(); i++)
		ui.tableWidget->removeRow(i);

for (int i = 0; i < ui.tableWidget->rowCount(); i++)
		ui.tableWidget->removeRow(i);

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[high_flyer]

Is this the real and full code?

Post few lines before and after as well please.

[jano_alex_es]

try "clear" (delete all the items) or "clearContents" (delete all the items but the headers)

[VitaliBR]

try "clear" (delete all the items) or "clearContents" (delete all the items but the headers)

I had tried "clearContents" but it clears the contents, leaving lines in the table, I need to remove the lines also

thanks

[jano_alex_es]

So try "clear"... as far as I remember, it deletes all, even the lines.

[VitaliBR]

So try "clear"... as far as I remember, it deletes all, even the lines.

It erases all the same, including the column names
there is no other way?

Or how do I put the names in the columns again? (I named the columns using the QTDesigner)

lol

Thanks


I tried this, but the program simply fails (crash) if I try to rename the columns

ui.tableWidget->clear();
 
	ui.tableWidget->horizontalHeaderItem(0)->setText("Name");
	ui.tableWidget->horizontalHeaderItem(1)->setText("IP/DNS");
	ui.tableWidget->horizontalHeaderItem(2)->setText("Phone");
	ui.tableWidget->horizontalHeaderItem(3)->setText("Situation");

ui.tableWidget->clear();
	
	ui.tableWidget->horizontalHeaderItem(0)->setText("Name");
	ui.tableWidget->horizontalHeaderItem(1)->setText("IP/DNS");
	ui.tableWidget->horizontalHeaderItem(2)->setText("Phone");
	ui.tableWidget->horizontalHeaderItem(3)->setText("Situation");

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[jano_alex_es]

I think you delete the headers when you use "clear", so you need to create them again.

Something like:

QTableWidgetItem* pHeader1 = new  QTableWidgetItem("Name");
ui.tableWidget->setHorizontalHeaderItem(0, pHeader1);
 QTableWidgetItem* pHeader2 = new  QTableWidgetItem("IP/DNS");
ui.tableWidget->setHorizontalHeaderItem(1, pHeader2);
//etc

QTableWidgetItem* pHeader1 = new  QTableWidgetItem("Name");
ui.tableWidget->setHorizontalHeaderItem(0, pHeader1);
 QTableWidgetItem* pHeader2 = new  QTableWidgetItem("IP/DNS");
ui.tableWidget->setHorizontalHeaderItem(1, pHeader2);
//etc

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[VitaliBR]

I solved my problem:

for(int i = ui.tableWidget->rowCount() - 1; i >= 0; i--){
		ui.tableWidget->removeRow(i);
	}

for(int i = ui.tableWidget->rowCount() - 1; i >= 0; i--){
		ui.tableWidget->removeRow(i);
	}

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Thanks

[ChrisW67]

QTableWidget::setRowCount() will remove rows to decrease the row count. Set it to zero...