jQuery: count number of rows in a table


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How do I count the number of tr elements within a table using jQuery?

I know there is a similar question, but I just want the total rows.


所有的回答
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    Use a selector that will select all the rows and take the length.

    var rowCount = $('#myTable tr').length;
    

    Note: this approach also counts all trs of every nested table!


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    If you use <tbody> or <tfoot> in your table, you'll have to use the following syntax or you'll get a incorrect value:

    var rowCount = $('#myTable >tbody >tr').length;
    

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    Alternatively...

    var rowCount = $('table#myTable tr:last').index() + 1;
    

    jsFiddle DEMO

    This will ensure that any nested table-rows are not also counted.


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    Well, I get the attr rows from the table and get the length for that collection:

    $("#myTable").attr('rows').length;
    

    I think that jQuery works less.


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    Here's my take on it:

    //Helper function that gets a count of all the rows <TR> in a table body <TBODY>
    $.fn.rowCount = function() {
        return $('tr', $(this).find('tbody')).length;
    };
    

    USAGE:

    var rowCount = $('#productTypesTable').rowCount();
    

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    I got the following:

    jQuery('#tableId').find('tr').index();
    

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    I needed a way to do this in an AJAX return, so I wrote this piece:

    <p id="num_results">Number of results: <span></span></p>
    
    <div id="results"></div>
    
    <script type="text/javascript">
    $(function(){
        ajax();
    })
    
    //Function that makes Ajax call out to receive search results
    var ajax = function() {
        //Setup Ajax
        $.ajax({
            url: '/path/to/url', //URL to load
            type: 'GET', //Type of Ajax call
            dataType: 'html', //Type of data to be expected on return
            success: function(data) { //Function that manipulates the returned AJAX'ed data
                $('#results').html(data); //Load the data into a HTML holder
                var $el = $('#results'); //jQuery Object that is holding the results
                setTimeout(function(){ //Custom callback function to count the number of results
                    callBack($el);
                });
            }
        });
    }
    
    //Custom Callback function to return the number of results
    var callBack = function(el) {
        var length = $('tr', $(el)).not('tr:first').length; //Count all TR DOM elements, except the first row (which contains the header information)
        $('#num_results span').text(length); //Write the counted results to the DOM
    }
    </script>
    

    Obviously this is a quick example, but it may be helpful.


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    I found this to work really well if you want to count rows without counting the th and any rows from tables inside of tables:

    var rowCount = $("#tableData > tbody").children().length;
    

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    try this one if there is tbody

    Without Header

    $("#myTable > tbody").children.length
    

    If there is header then

    $("#myTable > tbody").children.length -1
    

    Enjoy!!!


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    row_count =  $('#my_table').find('tr').length;
    column_count =  $('#my_table').find('td').length / row_count;
    

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    var trLength = jQuery('#tablebodyID >tr').length;