jQuery: count number of rows in a table

问题

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.

回答1:

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!

回答2:

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;

回答3:

Alternatively...

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

jsFiddle DEMO

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

回答4:

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.

回答5:

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();

回答6:

I got the following:

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

回答7:

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.

回答8:

try this one if there is tbody

Without Header

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

If there is header then

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

Enjoy!!!

回答9:

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;

回答10:

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

回答11:

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

来源：https://stackoverflow.com/questions/1149958/jquery-count-number-of-rows-in-a-table

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jquery

count

row