How to add a DataCell to a DataRow?

Question

In my code I want that the user can add a new DataCell to a DataRow in my DataTable. But I dont know how I can add a single DataCell. My Code looks like this, but it didnt work:

  List<DataRow> RowList = [
    DataRow(cells: <DataCell>[
      DataCell(Text('Column 1')),
      DataCell(Text('Column 2')),
      DataCell(Text('Column 3')),
    ]),
  ];
  
  void _addDataCell() {
    RowList.add(DataCell(Text('Column 4')))
  }

w461 · Accepted Answer · 2021-07-06 21:57:13Z

0

You will need set a new state with RowList.add(DataCell(Text('Column 4'))).

So you should habe a stateful widget and then, when calling _addDataCell() via some button, there should be an onPressed: setState(() {_addDataCell();}) (pseudo code, check syntax, since I just started again with Flutter)

answered Jul 6, 2021 at 21:57

w461

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3 Comments

Dalon Over a year ago

yes i have a stateful widget and a button to call the _addDataCell, this is only a snippet from my Code. My Problem is, that i want to add a single cell to a DataRow and the code 'RowList.add(DataCell(Text('Column 4')))' dont work.

w461 Over a year ago

hard to tell not seeing the rest of the relevant code. But as I said, make sure that due set a new state. Otherwise the widget will not rebuild and hence you would not see any new cell.

Dalon Over a year ago

thank you. My only problem is that i need to know how to insert a new cell to a DataRow, the rest works pretty fine. Is there a function like 'RowList.cells.add(DataCell(Text('Column 4')))' so that the Text 'Column 4' gets added in the DataRow? So the result looks like [Column1; Column2; Column3; Column4]?

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