Flutter List <动态>应为List <DataRow>
我正在尝试使用flutter的DataTable小部件，但一直出现此错误，我想创建一种方法来为表格生成数据。
var dataList = [
DataSectionCollection(
category: 'Category',
date: 'January 01, 2019',
item: [
DataSectionItem(
symbol: "ICMS", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "ICMS", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "ICMS", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "ICMS", amount: " 474.858.228.17", percentage: 3.55),
],
),
DataSectionCollection(
category: 'Category',
date: 'January 01, 2019',
item: [
DataSectionItem(
symbol: "AAAA", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "AAA", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "AAA", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "AAA", amount: " 474.858.228.17", percentage: 3.55),
],
),
DataSectionCollection(
category: 'Category',
date: 'January 01, 2019',
item: [
DataSectionItem(
symbol: "BBBB", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "BBBB", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "BBBB", amount: " 474.858.228.17", percentage: 3.55),
DataSectionItem(
symbol: "BBBB", amount: " 474.858.228.17", percentage: 3.55),
],
),
];
_getData01(List listOfData) {
return DataTable(
columns: listOfData
.map(
(column) => DataColumn(
label: Container(),
),
)
.toList(),
rows: listOfData
.map((stat) => stat.item.map((row) => DataRow(cells: [
DataCell(
Text(row.symbol),
),
DataCell(
Text(row.amount),
),
DataCell(
Text("${row.symbol}"),
),
])))
.toList(),
);
}
我不确定自己在做什么错。有人可以帮忙吗？我在列表上映射以创建列的第一位到第二位都工作正常。
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您的问题在于.map()遍历数据时方法的嵌套。我将其弄乱以使其更具可读性并交换为.forEach()方法：
Widget _getData01(List listOfData) { List<DataRow> rows = []; listOfData.forEach((stat){ stat.item.forEach((row){ rows.add( DataRow( cells: [ DataCell( Text(row.symbol), ), DataCell( Text(row.amount), ), DataCell( Text("${row.symbol}"), ), ] ) ); }); }); return DataTable( columns: listOfData.map( (column) => DataColumn( label: Container(), ) ).toList(), rows: rows, ); }我只能通过用自己的数据替换您的模型类来进行测试，因此请进行测试并提供反馈。
2020-01-17 09:07:35赞同 展开评论 打赏
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