更改 Jquery 表脚本以仅过滤一列而不是所有列

Question

我正在使用名为 datatables http://datatables.net/ 的 jquery 脚本来显示从我的数据库中提取的一些数据。我已经为我自己的表格修改了此处显示的示例 http://datatables.net/release-datatables/examples/api/multi_filter_select.html .我现在遇到的问题是它在每一列上放置一个过滤器，有没有办法可以修改它，以便在我的表名Reps 的列上只有一个过滤器？如果我需要将一个名为“Reps”的类应用于此列，或者我可以使用列标题/页脚指定仅过滤该特定列吗？。

    (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 wany 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 )
    {
        var r='<select><option value=""></option>', i, iLen=aData.length;
        for ( i=0 ; i<iLen ; i++ )
        {
            r += '<option value="'+aData[i]+'">'+aData[i]+'</option>';
        }
        return r+'</select>';
    }


    $(document).ready(function() {
        /* Initialise the DataTable */
        var oTable = $('#dashboard').dataTable( {
          "bJQueryUI": true,

            "bInfo": true,

            "bAutoWidth": true,

            "bFilter": true,

            "bLengthChange": true,

            "bPaginate": true,

            "bProcessing": true,

             "bSort": true,

              "sPaginationType": "full_numbers",

               "aaSorting": [[ 9, "desc" ]],

                "iDisplayLength": 5,

                "bLengthChange": false   
        } );

        /* Add a select menu for each TH element in the table footer */
        $("tfoot th").each( function ( i ) {
            this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
            $('select', this).change( function () {
                oTable.fnFilter( $(this).val(), i );
            } );
        } );
    } );

Answer 1

您可以使用eq() 方法选择特定索引处的元素。它将匹配元素的集合减少到指定索引处的元素。

例如如果你想从表格中选择第二列，你可以这样做。

$('table thead th').eq(1);

您也可以使用伪选择器来选择指定索引处的元素。

$('table thead th:eq(1)');

参考资料： eq() - http://api.jquery.com/eq/ :eq() - http://api.jquery.com/eq-selector/