如何使datatable能够对选定的列进行筛选
How to make DataTables able to filter on selected columns
我有以下JavaScript与数据表。
$(document).ready(function() {
var columns = [
{title: "Name"},
{title: "Position"},
{title: "Office"},
{title: "Extn."},
{title: "Start date"},
{title: "Salary"}
];
// Footer construction
var $tfoot = $("#example tfoot tr");
for (var i = 0, len = columns.length; i < len ; i++){
$tfoot.append("<th>");
}
$('#example').DataTable( {
data: dataSet,
columns: columns,
initComplete: function (setting, json) {
this.api().columns().every( function () {
var column = this;
var select = $('<select><option value=""></option></select>')
.appendTo( $(column.footer()).empty() )
.on( 'change', function () {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search( val ? '^'+val+'$' : '', true, false )
.draw();
} );
column.data().unique().sort().each( function ( d, j ) {
select.append( '<option value="'+d+'">'+d+'</option>' )
} );
} );
}
} );
} );
var dataSet = [
["Airi Satou", "Accountant", "Tokyo", "5407", "2008/11/28", "$162,700"],
["Angelica Ramos", "Chief Executive Officer (CEO)", "London", "5797", "2009/10/09", "$1,200,000"],
["Gavin Joyce", "Developer", "Edinburgh", "8822", "2010/12/22", "$92,575"],
["Jennifer Chang", "Regional Director", "Singapore", "9239", "2010/11/14", "$357,650"],
["Brenden Wagner", "Software Engineer", "San Francisco", "1314", "2011/06/07", "$206,850"],
["Fiona Green", "Chief Operating Officer (COO)", "San Francisco", "2947", "2010/03/11", "$850,000"],
["Shou Itou", "Regional Marketing", "Tokyo", "8899", "2011/08/14", "$163,000"],
["Martena Mccray", "Post-Sales support", "Edinburgh", "8240", "2011/03/09", "$324,050"],
["Unity Butler", "Marketing Designer", "San Francisco", "5384", "2009/12/09", "$85,675"]
];
<link href="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.css" rel="stylesheet"/>
<script src="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.js"></script>
<table id="example" class="display" width="100%">
<tfoot><tr></tr></tfoot>
</table>
正如您所看到的,当您运行代码片段时,我可以在底部使用下拉列表过滤每个列。但是我打算做的只是在第2列(位置)和第3列(办公室)上应用该列。我怎样才能做到呢?
every()
函数传递一个索引参数给回调。您可以使用它来检查是否要添加过滤器。
this.api().columns().every( function (index) {
if (index != 1 && index != 2) return;
$(document).ready(function() {
var columns = [
{title: "Name"},
{title: "Position"},
{title: "Office"},
{title: "Extn."},
{title: "Start date"},
{title: "Salary"}
];
// Footer construction
var $tfoot = $("#example tfoot tr");
for (var i = 0, len = columns.length; i < len ; i++){
$tfoot.append("<th class='select-filter'>");
}
$('#example').DataTable( {
data: dataSet,
columns: columns,
initComplete: function (setting, json) {
this.api().columns().every( function (index) {
// just continue if index 1 and 2
if (index != 1 && index != 2) return;
var column = this;
var select = $('<select><option value=""></option></select>')
.appendTo( $(column.footer()).empty() )
.on( 'change', function () {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search( val ? '^'+val+'$' : '', true, false )
.draw();
} );
column.data().unique().sort().each( function ( d, j ) {
select.append( '<option value="'+d+'">'+d+'</option>' )
} );
} );
}
} );
} );
var dataSet = [
["Airi Satou", "Accountant", "Tokyo", "5407", "2008/11/28", "$162,700"],
["Angelica Ramos", "Chief Executive Officer (CEO)", "London", "5797", "2009/10/09", "$1,200,000"],
["Gavin Joyce", "Developer", "Edinburgh", "8822", "2010/12/22", "$92,575"],
["Jennifer Chang", "Regional Director", "Singapore", "9239", "2010/11/14", "$357,650"],
["Brenden Wagner", "Software Engineer", "San Francisco", "1314", "2011/06/07", "$206,850"],
["Fiona Green", "Chief Operating Officer (COO)", "San Francisco", "2947", "2010/03/11", "$850,000"],
["Shou Itou", "Regional Marketing", "Tokyo", "8899", "2011/08/14", "$163,000"],
["Martena Mccray", "Post-Sales support", "Edinburgh", "8240", "2011/03/09", "$324,050"],
["Unity Butler", "Marketing Designer", "San Francisco", "5384", "2009/12/09", "$85,675"]
];
<link href="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.css" rel="stylesheet"/>
<script src="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.js"></script>
<table id="example" class="display" width="100%">
<tfoot><tr></tr></tfoot>
</table>
将js从- this.api().columns().every( function () {
改为this.api().columns('.select-filter').every( function () {
,然后添加类"select-filter"到table-header:
<thead>
<tr>
<th>Name</th>
<th class="select-filter">Position</th>
<th class="select-filter">Office</th>
<th>Extn.</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</thead>
<解决方案/strong>
您可以在调用columns()
API方法中指定具有列索引的数组。
例如,只显示第二列和第三列中的过滤器:
this.api().columns([1,2]).every( function (index) {
演示strong>
$(document).ready(function() {
var columns = [
{title: "Name"},
{title: "Position"},
{title: "Office"},
{title: "Extn."},
{title: "Start date"},
{title: "Salary"}
];
// Footer construction
var $tfoot = $("#example tfoot tr");
for (var i = 0, len = columns.length; i < len ; i++){
$tfoot.append("<th class='select-filter'>");
}
$('#example').DataTable( {
data: dataSet,
columns: columns,
initComplete: function (setting, json) {
this.api().columns([1,2]).every( function (index) {
var column = this;
var select = $('<select><option value=""></option></select>')
.appendTo( $(column.footer()).empty() )
.on( 'change', function () {
var val = $.fn.dataTable.util.escapeRegex(
$(this).val()
);
column
.search( val ? '^'+val+'$' : '', true, false )
.draw();
} );
column.data().unique().sort().each( function ( d, j ) {
select.append( '<option value="'+d+'">'+d+'</option>' )
} );
} );
}
} );
} );
var dataSet = [
["Airi Satou", "Accountant", "Tokyo", "5407", "2008/11/28", "$162,700"],
["Angelica Ramos", "Chief Executive Officer (CEO)", "London", "5797", "2009/10/09", "$1,200,000"],
["Gavin Joyce", "Developer", "Edinburgh", "8822", "2010/12/22", "$92,575"],
["Jennifer Chang", "Regional Director", "Singapore", "9239", "2010/11/14", "$357,650"],
["Brenden Wagner", "Software Engineer", "San Francisco", "1314", "2011/06/07", "$206,850"],
["Fiona Green", "Chief Operating Officer (COO)", "San Francisco", "2947", "2010/03/11", "$850,000"],
["Shou Itou", "Regional Marketing", "Tokyo", "8899", "2011/08/14", "$163,000"],
["Martena Mccray", "Post-Sales support", "Edinburgh", "8240", "2011/03/09", "$324,050"],
["Unity Butler", "Marketing Designer", "San Francisco", "5384", "2009/12/09", "$85,675"]
];
<link href="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.css" rel="stylesheet"/>
<script src="https://cdn.datatables.net/r/dt/jq-2.1.4,dt-1.10.9,b-1.0.3,b-flash-1.0.3/datatables.min.js"></script>
<table id="example" class="display" width="100%">
<tfoot><tr></tr></tfoot>
</table>
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