How to set a text style to the Datatable?

Question

I'm passing data to a datatable located in the child widget from parent widget. I need to set a textstyle to the text in whole datatable how can I do that?

Child widget

Container(
      child: widget.dataTable,
    )                    

Parent widget

DataTable(headingRowHeight: 0, columns: [
        DataColumn(label: Text(' ')),
        DataColumn(label: Text(' ')),
      ], rows: [
        DataRow(
            cells: [DataCell(Text('John')), DataCell(Text('department1'))])
      ])

Answer 1

Inside DataTable widget, you can find properties called dataTextStyle. Then you can use TextStyle as usual. Example:

DataTable(
  headingRowHeight: 0,
  // for Heading Text Style
  headingTextStyle: TextStyle(fontSize:14, ...),
  // for Text Style inside Data Rows
  dataTextStyle: TextStyle(fontSize: 12, ...),
  columns:[],
  rows:[],
),

You can check here for more advance.

Instead of setting a style for each DataTable. If you only have a one style and want to applying a custom style to the entire apps, you can set the ThemeData in MaterialApp. Example:

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        dataTableTheme: DataTableTheme(
          headingTextStyle: ... // put the style here
          dataTextStyle: ... // put the style here
          // There are many styles here that can be customized
        ),
      ),
      home: Scaffold(
        body: Center(
          child: Text('Hello, World!'),
        ),
      ),
    );
  }