flutter - 如何从列表中获取分页数据表从开始日期到结束日期的行并添加搜索栏，如图所示？

Question

我想根据开始日期和结束日期获取数据表的行。

假设我的开始日期是“2021-09-08”，结束日期是“2021-10-08”。

基于这些日期，我想要使用颤振的分页数据表的行。我想要使​​用以下列表的开始日期和结束日期之间的日期。下面的代码适用于数据表，但我需要分页数据表。

class MyData extends DataTableSource {
  final List<UserView> _data = [];
  List<UserView> userData = [
    UserView(
        date: '4-6-2021',
        description: 'Product Ordered',
        amount: 189.14,
        status: '0'), .........
   
  ];

  @override
  bool get isRowCountApproximate => false;
  @override
  int get rowCount => userData.length;
  @override
  int get selectedRowCount => 0;
  @override
  DataRow getRow(int index) {
    return DataRow(cells: [
      DataCell(Text(userData[index].date)),
      DataCell(Text(userData[index].description)),
      DataCell(Text('${userData[index].amount}')),
    ]);
  }
}

下面是有状态的小部件类

class UserViewPageState  {

  final DataTableSource _data = MyData();
 List<UserView> _foundUsers = [];

  
  late DateTime from = DateTime.now();
  late DateTime to = DateTime.now();
......
PaginatedDataTable(
                      source: _data,
                      columns: const [
                        DataColumn(label: Text('Date')),
                        DataColumn(label: Text('Description')),
                        DataColumn(label: Text('Amount')),
                        DataColumn(label: Text('Status')),
                      ],
                      columnSpacing: 20,
                      horizontalMargin: 10,
                      rowsPerPage: 6,
                      showCheckboxColumn: false,
                    ),

搜索条形码但不起作用

void _runFilter(String enteredKeyword) {
    List<UserView> results = [];
    if (enteredKeyword.isEmpty) {
      results = d;
    } else {
      results = d
          .where((name) =>
              name.date.toLowerCase().contains(enteredKeyword.toLowerCase()) ||
              name.description
                  .toString()
                  .contains(enteredKeyword.toLowerCase()))
          .cast<UserView>()
          .toList();
    }
    setState(() {
      _foundUsers = results;
    });
  }

日期过滤代码但不起作用

 late DateTime from = DateTime.now();
  late DateTime to = DateTime.now();
  Future<void> _selectDate(BuildContext context, int i) async {
    final DateTime? pickedDate = await showDatePicker(
        context: context,
        initialDate: DateTime.now(),
        firstDate: DateTime(2015),
        lastDate: DateTime(2050));
    if (pickedDate != null) {
      if (i == 0) {
        setState(() {
          from = pickedDate;
        });
      } else if (i == 1) {
        setState(() {
          to = pickedDate;
          getdaysInBetween();
        });
      }
    }
  }
getdaysInBetween() {
    List<UserView> results = [];
    results = _usersViewData.where((user) {
      final currentDate = DateTime.tryParse(user.date);
      return currentDate != null &&
          currentDate.isAfter(from.subtract(const Duration(days: 1))) &&
          currentDate.isBefore(to.add(const Duration(days: 1)));
    }).toList();
    setState(() {
      _foundRows = results;
    });
  }

如何使用搜索栏、Fromdate 和 Todate 的功能。