我有一个由 KnockoutJS 动态创建的 HTML 表格...
我希望表的输出按父级分组,如下所示...
我该怎么做?
<table class="table table-hover">
<thead>
<tr>
<th>Task ID</th>
<th>Task name</th>
<th>Parent</th>
</tr>
</thead>
<tbody data-bind="foreach: tasks">
<tr>
<td data-bind="text: TaskID"></td>
<td data-bind="text: TaskName"></td>
<td data-bind="text: Parent"></td>
</tr>
</tbody>
</table>
_
var viewModel = function(data) {
var self = this;
// variables
self.currentTask = ko.observable();
self.tasks = ko.observableArray([
{TaskID: 1, TaskName: "ManualItems", Parent: 3},
{TaskID: 2, TaskName: "Trades", Parent: null},
{TaskID: 3, TaskName: "Positions", Parent: null},
{TaskID: 4, TaskName: "Rec", Parent: 3},
{TaskID: 5, TaskName: "Cash", Parent: null},
{TaskID: 6, TaskName: "ReportA", Parent: 5},
{TaskID: 7, TaskName: "FileIn", Parent: 2},
{TaskID: 8, TaskName: "ReportB", Parent: 5}
]);
};
ko.applyBindings(new viewModel());
最佳答案
这是另一个解决方案,这次保留原始可观察数组并使用过滤器功能来创建父子行为。运行下面的代码片段。
var viewModel = function(data) {
var self = this;
self.tasks = ko.observableArray([{
TaskID: 1,
TaskName: "ManualItems",
Parent: 3
}, {
TaskID: 2,
TaskName: "Trades",
Parent: null
}, {
TaskID: 3,
TaskName: "Positions",
Parent: null
}, {
TaskID: 4,
TaskName: "Rec",
Parent: 3
}, {
TaskID: 5,
TaskName: "Cash",
Parent: null
}, {
TaskID: 6,
TaskName: "ReportA",
Parent: 5
}, {
TaskID: 7,
TaskName: "FileIn",
Parent: 2
}, {
TaskID: 8,
TaskName: "ReportB",
Parent: 5
}]);
self.getChildren = function(row) {
return ko.utils.arrayFilter(this.tasks(), function(item) {
return item.Parent === row.TaskID
});
}
self.filteredtasks = ko.computed(function() {
return ko.utils.arrayFilter(this.tasks(), function(item) {
return !item.Parent;
});
}, this);
};
ko.applyBindings(new viewModel());
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<table class="table table-hover">
<thead>
<tr>
<th>Parent</th>
<th>Parent Name</th>
<th>Task Id</th>
<th>Task Name</th>
</tr>
</thead>
<tbody>
<!-- ko foreach: filteredtasks -->
<tr>
<td data-bind="text: TaskID"></td>
<td data-bind="text: TaskName"></td>
<td></td>
<td></td>
</tr>
<!-- ko foreach: $root.getChildren($data) -->
<tr>
<td></td>
<td></td>
<td data-bind="text: TaskID"></td>
<td data-bind="text: TaskName"></td>
</tr>
<!-- /ko -->
<!-- /ko -->
</tbody>
</table>
关于javascript - 按父级 knockout HTML 表格组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44498052/