jQuery DataTables仅针对特定列进行过滤 [英] jQuery DataTables Filtering for Specific Columns Only

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问题描述

我正在使用jQuery插件数据表( http://datatables.net )进行分页,搜索功能和过滤。



有一个过滤器函数( http://datatables.net/release-datatables/examples/api/multi_filter_select.html ),它为每个列放置表单选择元素。



我的问题是我不希望过滤器为每个列选择元素,只有一些。我修改了原始代码,只需要是/否过滤,我的第一列包含用户名。



如何从第一列中删除表单select元素?



JavaScript:

 < script type =text / javascript> 

$(document).ready(function(){

(function($){
/ *
*功能:fnGetColumnData
*目的:从特定的列返回一个表值的数组
*返回:数组字符串:1d数据数组
*输入:对象:oSettings - dataTable设置对象,这是过去最后一个参数函数
* int:iColumn - 从
* bool中提取数据的列的ID:bool:bUnique - 可选 - 如果设置为false,重复的值不会被过滤掉
* bool: bFiltered - 可选 - 如果设置为false,则使用所有表数据(不仅仅是过滤的)
* bool:bIgnoreEmpty - 可选 - 如果设置为false,则空值不会从结果数组中过滤
*作者:Benedikt Forchhammer< b.forchhammer / AT\ mind2.de>
* /
$ .fn.dataTableExt.oApi.fnGetColumnData = function(oSettings,iColumn,bUnique,bFiltered,bIgnoreEmpty){
//检查我们有一列id
if(typeof iColumn ==undefined)return new Array();

//默认情况下,我们只需要唯一的数据
if(typeof bUnique ==undefined)bUnique = true;

//默认情况下,我们只想查看过滤数据
if(typeof bFiltered ==undefined)bFiltered = true;

//默认情况下,我们不希望包含空值
if(typeof bIgnoreEmpty ==undefined)bIgnoreEmpty = true;

//我们要循环的行列表
var aiRows;

//仅使用过滤行
if(bFiltered == true)aiRows = oSettings.aiDisplay;
//使用所有行
else aiRows = oSettings.aiDisplayMaster; //所有行号

//设置数据数组
var asResultData = new Array(); $ var $ a

for(var i = 0,c = aiRows.length; i iRow = aiRows [i];
var aData = this.fnGetData(iRow);
var sValue = aData [iColumn];

//忽略空值?
if(bIgnoreEmpty == true&& sValue.length == 0)continue;

//忽略唯一值?
else if(bUnique == true&& jQuery.inArray(sValue,asResultData)> -1)continue;

// else将值推送到结果数据数组
else asResultData.push(sValue);
}

返回asResultData;
}}(jQuery));


函数fnCreateSelect(aData)
{
return'< select>< option value =>选择< / option>< option value =是>是< / option>< option value =否>否< / option>< / select>';
}

var oTable = $('#results')。dataTable({
sDom:'<<filtersf><clear ><topTp><clear> rt<bottomil>',
iDisplayLength:5,
sPaginationType:full_numbers b $ bbSortCellsTop:true,
oLanguage:{
sSearch:搜索所有列:
},
aoColumns:[
null,
{sType:title-string},
{sType:title-string},
{sType:title-string} ,
{sType:title-string}
],
oTableTools:{
sSwfPath:../../scripts/TableTools/ copy_cvs_xls_pdf.swf
}
});


/ *为表脚注中的每个TH元素添加一个选择菜单* /
$(thead #filter td)each(function(i){
this.innerHTML = fnCreateSelect(oTable.fnGetColumnData(i));
$('select',this).change(function(){
oTable.fnFilter($(this) (),i);
});
});
});
< / script>

HTML:

 code>< table id =resultsclass =display> 
< thead>
< tr id =labels>
< 1> 1<
< th> 2< / th>
< 3> 3<
< th> 4<
< 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>


解决方案

您可以修改您的选择器以忽略第一个< td> 元素。每个匹配元素的索引应该比相应的列索引小1个。

  / *为每个TH元素添加一个选择菜单除了第一个表脚注* / 
$(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);
});
});

如果您希望能够指定要筛选的列索引,要做一些像

  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);
});
}
});

或者,如果您想通过添加类 .filter 到您想要过滤的列的任何< th> 元素,您可以执行类似于



每个(function(i){
if($(this).hasClass('filter')){pre> $('th','#labels'
$('td','#filter')。eq(i)
.html(fnCreateSelect(oTable.fnGetColumnData(i)))
.find('select')
.change(function(){oTable.fnFilter($(this).val(),i);});
}
});

未测试,但您的想法:)


I am using the jQuery plugin DataTables (http://datatables.net) for pagination, search capabilities and filtering.

There is a filter function (http://datatables.net/release-datatables/examples/api/multi_filter_select.html) that places form select elements for each column.

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.

How do I remove the form select element from the first column?

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:

<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>

解决方案

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.

/* 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

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 .filter to any <th> element whose column you wanted to filter, you could do something like

$('th', '#labels').each( function(i) {
    if ($(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 :)

这篇关于jQuery DataTables仅针对特定列进行过滤的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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