在Flutter中清除PaginatedDataTable的DataTableSource可以通过以下步骤实现:
以下是一个示例代码,演示如何在Flutter中清除PaginatedDataTable的DataTableSource:
import 'package:flutter/material.dart';
class CustomDataTableSource extends DataTableSource {
// 实现DataTableSource的必要方法
@override
int get rowCount => 10;
@override
bool get isRowCountApproximate => false;
@override
int get selectedRowCount => 0;
@override
DataRow getRow(int index) {
// 返回每一行的数据
return DataRow.byIndex(
index: index,
cells: [
DataCell(Text('Cell $index')),
DataCell(Text('Cell $index')),
DataCell(Text('Cell $index')),
],
);
}
}
class MyDataTable extends StatefulWidget {
@override
_MyDataTableState createState() => _MyDataTableState();
}
class _MyDataTableState extends State<MyDataTable> {
CustomDataTableSource _data = CustomDataTableSource();
void clearDataTableSource() {
setState(() {
_data = CustomDataTableSource();
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('PaginatedDataTable Example'),
),
body: Column(
children: [
RaisedButton(
child: Text('Clear DataTable Source'),
onPressed: clearDataTableSource,
),
Expanded(
child: PaginatedDataTable(
header: Text('DataTable'),
source: _data,
columns: [
DataColumn(label: Text('Column 1')),
DataColumn(label: Text('Column 2')),
DataColumn(label: Text('Column 3')),
],
rowsPerPage: 5,
),
),
],
),
);
}
}
void main() {
runApp(MaterialApp(
home: MyDataTable(),
));
}
在上面的示例中,我们创建了一个CustomDataTableSource类作为PaginatedDataTable的数据源。通过调用setState方法并重新实例化CustomDataTableSource类,我们可以在按钮点击时清除数据源。
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