Javascript 仅针对特定列的 jQuery 数据表过滤
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jQuery DataTables Filtering for Specific Columns Only
提问by Michael
I am using the jQuery plugin DataTables (http://datatables.net) for pagination, search capabilities and filtering.
我正在使用 jQuery 插件 DataTables ( http://datatables.net) 进行分页、搜索功能和过滤。
There is a filter function (http://datatables.net/release-datatables/examples/api/multi_filter_select.html) that places form select elements for each column.
有一个过滤器函数（http://datatables.net/release-datatables/examples/api/multi_filter_select.html）为每一列放置表单选择元素。
My issue is that I don't want the filter select elements for every column, only some. I've modified the original code as I want Yes/No filtering only, and my first column contains user names.
我的问题是我不希望每列的过滤器选择元素，只有一些。我修改了原始代码，因为我只想要是/否过滤，并且我的第一列包含用户名。
How do I remove the form select element from the first column?
如何从第一列中删除表单选择元素？
JavaScript:
JavaScript：
<script type="text/javascript">
$(document).ready(function() {
(function($) {
/*
* Function: fnGetColumnData
* Purpose: Return an array of table values from a particular column.
* Returns: array string: 1d data array
* Inputs: object:oSettings - dataTable settings object. This is always the last argument past to the function
* int:iColumn - the id of the column to extract the data from
* bool:bUnique - optional - if set to false duplicated values are not filtered out
* bool:bFiltered - optional - if set to false all the table data is used (not only the filtered)
* bool:bIgnoreEmpty - optional - if set to false empty values are not filtered from the result array
* Author: Benedikt Forchhammer <b.forchhammer /AT\ mind2.de>
*/
$.fn.dataTableExt.oApi.fnGetColumnData = function ( oSettings, iColumn, bUnique, bFiltered, bIgnoreEmpty ) {
// check that we have a column id
if ( typeof iColumn == "undefined" ) return new Array();
// by default we only want unique data
if ( typeof bUnique == "undefined" ) bUnique = true;
// by default we do want to only look at filtered data
if ( typeof bFiltered == "undefined" ) bFiltered = true;
// by default we do not wany to include empty values
if ( typeof bIgnoreEmpty == "undefined" ) bIgnoreEmpty = true;
// list of rows which we're going to loop through
var aiRows;
// use only filtered rows
if (bFiltered == true) aiRows = oSettings.aiDisplay;
// use all rows
else aiRows = oSettings.aiDisplayMaster; // all row numbers
// set up data array
var asResultData = new Array();
for (var i=0,c=aiRows.length; i<c; i++) {
iRow = aiRows[i];
var aData = this.fnGetData(iRow);
var sValue = aData[iColumn];
// ignore empty values?
if (bIgnoreEmpty == true && sValue.length == 0) continue;
// ignore unique values?
else if (bUnique == true && jQuery.inArray(sValue, asResultData) > -1) continue;
// else push the value onto the result data array
else asResultData.push(sValue);
}
return asResultData;
}}(jQuery));
function fnCreateSelect( aData )
{
return '<select><option value="">Select</option><option value="Yes">Yes</option><option value="No">No</option></select>';
}
var oTable = $('#results').dataTable({
"sDom": '<<"filters"f><"clear"><"top"Tp><"clear">rt<"bottom"il>>',
"iDisplayLength": 5,
"sPaginationType": "full_numbers",
"bSortCellsTop": true,
"oLanguage": {
"sSearch": "Search all columns:"
},
"aoColumns": [
null,
{ "sType": "title-string" },
{ "sType": "title-string" },
{ "sType": "title-string" },
{ "sType": "title-string" }
],
"oTableTools": {
"sSwfPath": "../../scripts/TableTools/copy_cvs_xls_pdf.swf"
}
});
/* Add a select menu for each TH element in the table footer */
$("thead #filter td").each( function ( i ) {
this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
$('select', this).change( function () {
oTable.fnFilter( $(this).val(), i );
} );
} );
} );
</script>
HTML:
HTML：
<table id="results" class="display">
<thead>
<tr id="labels">
<th>1</th>
<th>2</th>
<th>3</th>
<th>4</th>
<th>5?</th>
</tr>
<tr id="filter">
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
<td>5?</td>
</tr>
</thead>
<tbody>
...
</tbody>
</table>
采纳答案by Doug Owings
You can modify your selector to ignore the first <td>element. The index of each matched element should be 1 less than the corresponding column index.
您可以修改选择器以忽略第一个<td>元素。每个匹配元素的索引应该比对应的列索引小 1。
/* Add a select menu for each TH element except the first in the table footer */
$("thead #filter td:not(:eq(0))").each( function ( i ) {
var columnIndex = i + 1;
this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(columnIndex) );
$('select', this).change( function () {
oTable.fnFilter( $(this).val(), columnIndex );
} );
});
If you wanted to be able to specify the column indexes for which you wanted a filter, one way would be to do something like
如果您希望能够指定您想要过滤器的列索引，一种方法是执行类似的操作
var filterIndexes = [3, 4];
$('td', '#filter').each( function ( i ) {
if ($.inArray(i, filterIndexes) != -1) {
this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
$('select', this).change( function () {
oTable.fnFilter( $(this).val(), i );
});
}
});
Or, if you wanted to control filters by adding a class .filterto any <th>element whose column you wanted to filter, you could do something like
或者，如果您想通过向要过滤其列的.filter任何<th>元素添加一个类来控制过滤器，您可以执行以下操作
$('th', '#labels').each( function(i) {
if ($(this).hasClass( 'filter' )) {
$('td', '#filter').eq(i)
.html( fnCreateSelect(oTable.fnGetColumnData(i)) )
.find('select')
.change(function () { oTable.fnFilter($(this).val(), i); });
}
});
Not tested, but you get the idea :)
未经测试，但您明白了:)
回答by Urs
In the current version according to http://www.datatables.net/examples/api/multi_filter_select.html, for one column, I got lucky with this.api().column(0).every:
在根据http://www.datatables.net/examples/api/multi_filter_select.html的当前版本中，对于一列，我很幸运this.api().column(0).every：
$(document).ready(function() {
$('#mytable').DataTable( {
initComplete: function () {
this.api().column(0).every( function () {
var column = this;
var select = $('<select><option value=""></option></select>')
.appendTo( $(column.header()).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>' )
} );
} );
},
} );
} );
But is "every" still needed then? And how to target multiple columns?
但是“每个”还需要吗？以及如何定位多个列？
回答by Sitti Munirah Abdul Razak
I seconded matt voda answer, use this code for the first column:
我借调了 matt voda 答案，在第一列中使用此代码：
this.api().column( [0] ).every
and use this code for more:
并使用此代码获取更多信息：
this.api().column( [0,1,2] ).every
On the tfoot column which you want to skip, you can leave it blank
在要跳过的 tfoot 列上，您可以将其留空
回答by Furkat U.
The easiest way is put this for unneeded columns:
最简单的方法是将其用于不需要的列：
<input type="hidden">
回答by Manas Kumar Ballav
There is even a very easy way:
for those columns you don't want filtering just set the visibility to hidden of <th> in <tfoot>Example:
甚至还有一种非常简单的方法：对于那些您不想过滤的列，只需将<th> in <tfoot>示例的可见性设置为隐藏：
<th style="visibility: hidden;">Something</th>
回答by Avtandil Kavrelishvili
$("tfoot th").each( function ( i ) {
if(i>=3 && i<=6)
this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
$('select', this).change( function () {
oTable.fnFilter( $(this).val(), i );
});
});
This is the best way for insert Filter for Specific Column.
这是为特定列插入过滤器的最佳方式。
i - Is Number Of Coulmn.
<th></th>- *Tags number must be equal of Columns.
<th></th>- *标签数必须等于列数。
回答by Avinash Garg
for basic search you can get idea from:
对于基本搜索，您可以从以下方面获得想法：
$('tbody tr').addClass('visible');
$('thead tr th input:text').keyup(function(event) {
if (event.keyCode == 27 || $(this).val() == '')
{ ``$('tbody tr td ').show();
}
}
