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Flutter

              
                import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: DataTableDemo(),
    ),
  );
}
class DataTableDemo extends StatefulWidget {
  @override
  _DataTableDemoState createState() => _DataTableDemoState();
}

class _DataTableDemoState extends State<DataTableDemo> {
  List<Employee> emps;
  List<Employee> selectedEmps;
  int selectedSort = 2;
  String selectedName;
  final nameController = TextEditingController();
  final editNameController = TextEditingController();
  final lastNameController = TextEditingController();
  bool sort = true;
  bool flag = true;
  List<dynamic> labels = [
    {'name': 'First Name', 'num': true, 'col': 'firstName'},
    {'name': 'Last Name', 'num': true, 'col': 'lastName'},
    {'name': 'Id', 'num': true, 'col': 'id'},
    {'name': 'Email Id', 'num': true, 'col': 'email'},
  ];
  @override
  void initState() {
    // sort = false;
    selectedEmps = [];
    emps = Employee.getList();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Data Table Demo'),
        actions:[
          IconButton(
            icon: Icon(Icons.delete),
            onPressed: (){
              setState(() {
                selectedEmps.forEach((element) {
                  emps.remove(element);
                });
              });

            },
          )
        ]
      ),
      body: Column(
        children: <Widget>[
          Expanded(
            child: tableBody(
              context,
            ),
          ),
           ],
      ),
    );
  }

  SingleChildScrollView tableBody(BuildContext ctx) {
    return SingleChildScrollView(
      scrollDirection: Axis.vertical,
      child: SingleChildScrollView(
        scrollDirection: Axis.horizontal,
        child: DataTable(
          dataRowHeight: 50,
          dividerThickness: 5,
          sortAscending: sort,
          sortColumnIndex: selectedSort,
          showCheckboxColumn: true,
          columns: labels
              .map(
                (name) => DataColumn(
                  label: Text(
                    name['name'],
                    style: TextStyle(
                      fontStyle: FontStyle.italic,
                      color: Colors.deepOrange,
                    ),
                  ),
                  numeric: name['num'],
                  onSort: (columnIndex, ascending) {
                     setState(() {
                      sort = !sort;
                      selectedSort = columnIndex;
                    });
                    onSortColumn(columnIndex, ascending);
                  },
                ),
              )
              .toList(),
                rows: emps
              .map(
                (emp) => DataRow(
                    selected: selectedEmps.contains(emp),
                    onSelectChanged: (b) {
                      print("Onselect");
                      onSelectedRow(b, emp);
                    },
                    cells: [
                      DataCell(
                         Text(emp.firstName),
                                 ),
                      DataCell(
                        Text(emp.lastName),
                           ),
                      DataCell(
                        Text('${emp.id}'),
                     
                      ),
                      DataCell(
                        Text(emp.email),
                      ),
                    ]),
              )
              .toList(),
        ),
      ),
    );
  }

  onSortColumn(int columnIndex, bool ascending) {
 
     bool numeric = labels[columnIndex]['num'];
   
    if (numeric != true) {
  
      if (ascending) {
        emps.sort((a, b) => a.firstName.compareTo(b.firstName));
      } else {
        emps.sort((a, b) => b.firstName.compareTo(a.firstName));
      }
    } else {
      if (ascending) {
        Comparator<Employee> idComparator = (a, b) => a.id.compareTo(b.id);
        emps.sort(idComparator);
      } else {
        Comparator<Employee> idComparator = (a, b) => b.id.compareTo(a.id);
        emps.sort(idComparator);
      }
    }
  }

  onSelectedRow(bool selected, Employee emp) async {
    setState(() {
      if (selected) {
        selectedEmps.add(emp);
      } else {
        selectedEmps.remove(emp);
      }
    });
    print(selectedEmps);
  }

}

class Employee {
  String firstName;
  String lastName;
  int id;
  String email;

  Employee({this.firstName, this.lastName, this.id, this.email});

  static List<Employee> getList() {
    return <Employee>[
      Employee(
          firstName: "Shubham",
          lastName: "B",
          id: 2001,
          email: "shubham.b@walkingtree.tech"),
      Employee(
          firstName: "HariKrishna",
          lastName: "S",
          id: 1002,
          email: "harikrishna.s@walkingtree.tech"),
      Employee(
          firstName: "Vishnu",
          lastName: "P",
          id: 2003,
          email: "vishnu.p@walkingtree.tech"),
      Employee(
          firstName: "Suman",
          lastName: "Ravuri",
          id: 1004,
          email: "Suman.ravuri@walkingtree.tech "),
      Employee(
          firstName: "Prashanth",
          lastName: "K",
          id: 1006,
          email: "Prashanth.k@walkingtree.tech "),
      Employee(
          firstName: "Shubham2",
          lastName: "B",
          id: 1007,
          email: "shubham.b@walkingtree.tech"),
      Employee(
          firstName: "HariKrishna2",
          lastName: "S",
          id: 1008,
          email: "harikrishna.s@walkingtree.tech"),
      Employee(
          firstName: "Vishnu2",
          lastName: "P",
          id: 1009,
          email: "vishnu.p@walkingtree.tech"),
      Employee(
          firstName: "Suman2",
          lastName: "Ravuri",
          id: 1011,
          email: "Suman.ravuri@walkingtree.tech "),
      Employee(
          firstName: "Prashanth2",
          lastName: "K",
          id: 1021,
          email: "Prashanth.k@walkingtree.tech "),
      Employee(
          firstName: "Shubham3",
          lastName: "B",
          id: 1022,
          email: "shubham.b@walkingtree.tech"),
      Employee(
          firstName: "HariKrishna3",
          lastName: "S",
          id: 1023,
          email: "harikrishna.s@walkingtree.tech"),
      Employee(
          firstName: "Vishnu3",
          lastName: "P",
          id: 1024,
          email: "vishnu.p@walkingtree.tech"),
      Employee(
          firstName: "Suman3",
          lastName: "Ravuri",
          id: 1025,
          email: "Suman.ravuri@walkingtree.tech "),
      Employee(
          firstName: "Prashanth3",
          lastName: "K",
          id: 1026,
          email: "Prashanth.k@walkingtree.tech "),
      Employee(
          firstName: "Shubham4",
          lastName: "B",
          id: 1027,
          email: "shubham.b@walkingtree.tech"),
      Employee(
          firstName: "HariKrishna4",
          lastName: "S",
          id: 1028,
          email: "harikrishna.s@walkingtree.tech"),
      Employee(
          firstName: "Vishnu4",
          lastName: "P",
          id: 1029,
          email: "vishnu.p@walkingtree.tech"),
      Employee(
          firstName: "Suman4",
          lastName: "Ravuri",
          id: 1031,
          email: "Suman.ravuri@walkingtree.tech "),
      Employee(
          firstName: "Prashanth4",
          lastName: "K",
          id: 1032,
          email: "Prashanth.k@walkingtree.tech ")
    ];
  }
}

              
            
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