How to delete a row when long pressing on a data row in Flutter DataTable (SfDataGrid)?.

In this article, we will show you how to delete a row when long pressing on a data row in Flutter DataTable.

Initialize the SfDataGrid widget with all the necessary properties. The SfDataGrid.onCellLongPress event is triggered when a long press gesture with a primary button is recognized for a cell. Upon triggering onCellLongPress, you can obtain the rowColumnIndex. Using the rowIndex, you can then remove the corresponding row from the rows collection. After removing the row, update or refresh the DataGrid when the underlying data is updated by using notifyListeners.

 @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Syncfusion Flutter DataGrid'),
      ),
      body: SfDataGrid(
        onCellLongPress: (details) {
          // Restict the header rows.
          if (details.rowColumnIndex.rowIndex > 0) {
            //  Remove header count to the index, here 1 is minus.
            DataGridRow deleteRow = employeeDataSource
                .effectiveRows[details.rowColumnIndex.rowIndex - 1];

            employeeDataSource._employeeData.remove(deleteRow);
            employeeDataSource.refreshDataGrid();
          }
        },
        source: employeeDataSource,
        columnWidthMode: ColumnWidthMode.fill,
        columns: <GridColumn>[
          GridColumn(
              columnName: 'id',
              label: Container(
                  padding: const EdgeInsets.all(16.0),
                  alignment: Alignment.center,
                  child: const Text(
                    'ID',
                  ))),
          GridColumn(
              columnName: 'name',
              label: Container(
                  padding: const EdgeInsets.all(8.0),
                  alignment: Alignment.center,
                  child: const Text('Name'))),
          GridColumn(
              columnName: 'designation',
              label: Container(
                  padding: const EdgeInsets.all(8.0),
                  alignment: Alignment.center,
                  child: const Text(
                    'Designation',
                    overflow: TextOverflow.ellipsis,
                  ))),
          GridColumn(
              columnName: 'salary',
              label: Container(
                  padding: const EdgeInsets.all(8.0),
                  alignment: Alignment.center,
                  child: const Text('Salary'))),
        ],
      ),
    );
  }

You can download this example on GitHub.