How to retrieve additional row details by expanding a cell in Flutter DataGrid.

In this article, we will show you how to retrieve additional row details by expanding a cell in Flutter DataGrid.

Initialize the SfDataGrid widget with all the required properties. In the buildRow method, load the cell value along with the icon button, and call showDialog. The onPressed event of the IconButton in the buildRow method is where the dialog is triggered. This dialog displays the expanded details.

class EmployeeDataSource extends DataGridSource {

…..

 @override
  DataGridRowAdapter buildRow(DataGridRow row) {
    return DataGridRowAdapter(
        cells: row.getCells().map<Widget>((DataGridCell cell) {
      return Container(
        alignment: Alignment.center,
        child: cell.columnName == 'Name'
            ? Row(
                children: [
                  Expanded(
                    child: Container(
                      alignment: Alignment.centerLeft,
                      child: Text(
                        cell.value.toString(),
                      ),
                    ),
                  ),
                  SizedBox(
                    width: 40,
                    child: Builder(builder: (context) {
                      datagridRows.indexOf(row);
                      return IconButton(
                        hoverColor: Colors.transparent,
                        color: Colors.blue,
                        icon: const Icon(Icons.expand_more),
                        onPressed: () => _showDetailsDialog(context, row),
                      );
                    }),
                  )
                ],
              )
            : Container(
                padding: const EdgeInsets.symmetric(horizontal: 8.0),
                alignment:
                    cell.columnName == 'ID' || cell.columnName == 'Salary'
                        ? Alignment.centerRight
                        : Alignment.centerLeft,
                child: Text(
                  cell.value.toString(),
                ),
              ),
      );
    }).toList());
  }

  void _showDetailsDialog(BuildContext context, DataGridRow row) {
    int rowIndex = datagridRows.indexOf(row);
    showDialog<String>(
      context: context,
      builder: (BuildContext context) => AlertDialog(
        scrollable: true,
        titleTextStyle: const TextStyle(
          color: Colors.black,
          fontWeight: FontWeight.bold,
          fontSize: 16,
        ),
        title: const Text('Personal Details'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Close'),
          ),
        ],
        content: Padding(
          padding: const EdgeInsets.all(20.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text('Employee address: ${employees[rowIndex].address}'),
              const SizedBox(height: 10),
              Text('City: ${employees[rowIndex].city}'),
              const SizedBox(height: 10),
              Text('Country: ${employees[rowIndex].country}'),
            ],
          ),
        ),
      ),
    );
  }
}

You can download this example on GitHub.