How to Underline Text in Header of Flutter DataTable?

In this article, we will show you how to underline text in the header of a Flutter DataTable.

Initialize the SfDataGrid widget with all the necessary properties. The GridColumn.label property is used to display the desired widget in a column header. Within the label property of GridColumn, the corresponding header text widget is loaded. To underline the text, set TextDecoration.underline in the style property of Text. Additionally, you can adjust the underline thickness using decorationThickness.

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Syncfusion Flutter DataGrid')),
      body: SfDataGrid(
        source: employeeDataSource,
        columnWidthMode: ColumnWidthMode.fill,
        columns: <GridColumn>[
          GridColumn(
            columnName: 'id',
            label: Container(
              padding: EdgeInsets.all(16.0),
              alignment: Alignment.center,
              child: Text(
                'ID',
                style: TextStyle(
                  decoration: TextDecoration.underline,
                  decorationThickness: 3.0,
                ),
              ),
            ),
          ),
          GridColumn(
            columnName: 'name',
            label: Container(
              padding: EdgeInsets.all(8.0),
              alignment: Alignment.center,
              child: Text(
                'Name',
                style: TextStyle(
                  decoration: TextDecoration.underline,
                  decorationThickness: 2.0,
                ),
              ),
            ),
          ),
          GridColumn(
            columnName: 'designation',
            label: Container(
              padding: EdgeInsets.all(8.0),
              alignment: Alignment.center,
              child: Text(
                'Designation',
                style: TextStyle(
                  decoration: TextDecoration.underline,
                  decorationThickness: 2.0,
                ),
                overflow: TextOverflow.ellipsis,
              ),
            ),
          ),
          GridColumn(
            columnName: 'salary',
            label: Container(
              padding: EdgeInsets.all(8.0),
              alignment: Alignment.center,
              child: Text(
                'Salary',
                style: TextStyle(
                  decoration: TextDecoration.underline,
                  decorationThickness: 2.0,
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

You can download this example on GitHub.

Conclusion
I hope you enjoyed learning how to underline text in header of 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.
For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.
If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!