How to control button visibility on row selection in Flutter DataTable (SfDataGrid)?

In this article, we will show you how to control button visibility on row selection in Flutter DataTable.

To initialize the SfDataGrid widget with all the necessary properties, first create an instance of the DataGridController and assign it to the controller property. Use the selectedRows list from the DataGridController to check if a row is selected. In the buildRow method, if a row is selected, display an ElevatedButton; otherwise, show an empty widget (SizedBox.shrink()). When the button is clicked, it shows an AlertDialog with details of the selected row.

 @override
  DataGridRowAdapter? buildRow(DataGridRow row) {
    bool isSelected = controller.selectedRows.contains(row);
    return DataGridRowAdapter(
      cells:
          row.getCells().map<Widget>((dataGridCell) {
            return Container(
              alignment: Alignment.center,
              child:
                  dataGridCell.columnName == 'button'
                      ? LayoutBuilder(
                        builder: (
                          BuildContext context,
                          BoxConstraints constraints,
                        ) {
                          return isSelected
                              ? ElevatedButton(
                                onPressed: () {
                                  showDialog(
                                    context: context,
                                    builder:
                                        (context) => AlertDialog(
                                          content: SizedBox(
                                            height: 100,
                                            child: Column(
                                              mainAxisAlignment:
                                                  MainAxisAlignment
                                                      .spaceBetween,
                                              children: [
                                                Text(
                                                  'Employee ID: ${row.getCells()[0].value.toString()}',
                                                ),
                                                Text(
                                                  'Employee Name: ${row.getCells()[1].value.toString()}',
                                                ),
                                                Text(
                                                  'Employee Designation: ${row.getCells()[2].value.toString()}',
                                                ),
                                              ],
                                            ),
                                          ),
                                        ),
                                  );
                                },
                                child: const Text('Details'),
                              )
                              : const SizedBox.shrink();
                        },
                      )
                      : Text(dataGridCell.value.toString()),
            );
          }).toList(),
    );
}

You can download this example on GitHub.