How to Change Row Colors Dynamically by Theme in Flutter DataTable?

In this article, we will show you how to dynamically change row colors based on the theme in Flutter DataTable.

Initialize the SfDataGrid widget with all the necessary properties. To achieve this, set the appropriate context to the DataGridSource.context property and call notifyListeners from the DataGridSource when the theme is changed.

Brightness brightness = Brightness.light;

@override
  Widget build(BuildContext context) {
    return Theme(
      data: ThemeData(brightness: brightness),
      child: Scaffold(
          appBar: AppBar(title: const Text('Syncfusion Flutter DataGrid')),
          body: Builder(builder: (context) {
            return Column(
              children: [
                ElevatedButton(
                    onPressed: (() {
                      setState(() {
                        if (brightness == Brightness.dark) {
                          brightness = Brightness.light;
                          _employeeDataSource.context = context;
                        } else {
                          brightness = Brightness.dark;
                          _employeeDataSource.context = context;
                        }
                      });
                      _employeeDataSource.updateDataGrid();
                    }),
                    child: const Text('Change Theme')),
                const Padding(padding: EdgeInsets.all(5)),
                Expanded(
                  child: SfDataGrid(
                    source: _employeeDataSource,
                    columns: getColumns,
                    columnWidthMode: ColumnWidthMode.fill,
                  ),
                ),
              ],
            );
          })),
    );
  }

class EmployeeDataSource extends DataGridSource {

…

  BuildContext context;

  @override
  DataGridRowAdapter? buildRow(DataGridRow row) {
    return DataGridRowAdapter(
        color: Theme.of(context).brightness == Brightness.light
            ? Colors.teal
            : Colors.deepOrangeAccent,
        cells: row.getCells().map<Widget>((dataGridCell) {
          return Container(
              alignment: Alignment.center,
              padding: const EdgeInsets.symmetric(horizontal: 16.0),
              child: Text(
                dataGridCell.value.toString(),
                overflow: TextOverflow.ellipsis,
              ));
        }).toList());
  }

  void updateDataGrid() {
    notifyListeners();
  }
}

You can download the example from GitHub.

Conclusion
I hope you enjoyed learning how to change row colors dynamically by theme in Flutter DataTable.
You can refer to our Flutter DataGrid feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our Flatter DataGrid example to understand how to create and manipulate data.
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