add a new row in a table [duplicate] - javascript

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Add table row in jQuery
I want to add a new row to my table on a change event. Here is what I have so far:
$('#CourseID').change(function() {
$('#CourseListTable > tr > td:last').append('<td>...</td>');
});
Here is my table:
<%# Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<dynamic>" %>
<table id="CourseListTable">
<tr>
<th>Course ID</th>
<th>Course Section</th>
<th>Level</th>
</tr>
<tr>
<td><select name="CourseID" id="CourseID"></select></td>
<td><select name="CourseSection" id="CourseSection"></select></td>
<td><select name="Level" id="Level"></select></td>
</tr>
</table>
I am not able to get this to work. I am missing something over here can anyone let me know where my error lies?
Thanks in advance.

You mention append Row but in your code you are appending just cells.
If you need to actually append a full row, try this:
$('#CourseID').change(function() {
$('<tr/>').append('<td>...</td>').insertAfter('#CourseListTable tr:last');
});

This line:
$('#CourseListTable > tr > td:last').append('<td>...</td>');
appends a TD (<td>...</td>) to an existing TD (td:last); you want to append it to a TR, eg.
$('#CourseListTable > tr').append('<td>...</td>');
Of course, you mentioned wanting to add a new row, in which case you shouldn't be appending a <td> at all, you should be appending a <tr> (and you should append it to the table, obviously).

$('#CourseID').change(function() {
$('#CourseListTable > tbody > tr:eq(1)').append('<td>...</td>');
});

If you want to add a new row you have to add a tr
$('#CourseListTable tr:last').after('<tr><td>...</td><td>...</td><td>...</td></tr>');

You should use after instead, append will append the element inside the tr.
$('#CourseID').change(function() {
$('#CourseListTable tr:last').after('<tr><td>test</td><td>test</td><td>test</td></tr>');
});

follow this:
Customizing JQuery Cloned row attributes
It lets you clone, append and then customize each cell.. very flexible.

Related

How get only first td element [duplicate]

This question already has answers here:
How to select first child?
(6 answers)
Closed 4 years ago.
Suppose to have this html code:
<tr id="row_1">
<td>1</td>
<td>Text</tr>
</tr>
<tr id="row_2">
<td>2</td>
<td>home</tr>
</tr>
<tr id="row_n">
<td>n</td>
<td>n row</tr>
</tr>
I need to take only the first td element in a row, so I do:
$('[id^="row_"] > td ').each(function(){
});
But this jquery code it doesn't work because it gets me all first td children of tr but I want only the first td child of tr. Anyone can help?
Maybe with this:
$('[id^="row_"] > td:first-child')
You should use :first-child
You can do this using .each().
Example:
$('td:first-child').each(function() {
console.log($(this).text());
});
you can use :first-child like this:
var firstTd = $('td:first-child');
ref: https://api.jquery.com/first-child-selector/

jQuery finding child elements of <table>?

I am trying to execute a function for each "tr" child element of my "table" with jquery, but this code does not identify the children. I've used this code for "div" based designs before and it works perfectly if I change the "table" and "tr" tags to "div" but it doesn't run here!
This is simple design:
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
<table>
<tr align="center">
<input id="btnSearch" type="button" value="Search" />
</tr>
</table>
And this is jquery:
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch").children("tr").each(function(){
alert($(this).text);
});
});
});
jsfiddle:
Note that the alert is run just once! And I have also removed the "tr" for children in my jsfiddle to make the code runnable...
could anyone help me?
The tr elements are not children of table, the are children of tbody (or thead or tfoot). The tbody element is automatically created if you don't specify it. You can figure this out easily for yourself if you inspect the generated DOM.
Long story short, either search for all descendants, with .find
$("#tblSearch").find("tr")
// simpler:
$("#tblSearch tr")
or include tbdoy in your selector:
$("#tblSearch").children("tbody").children("tr")
// simpler:
$("#tblSearch > tbody > tr")
That being said, you also have to add the actual content inside td elements, as noted in the other answers.
If you are new to HTML and tables, read the MDN documentation.
There are 2 problems, an invalid html and the selector is wrong
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
then
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch").find(">tbody > tr").each(function () {
alert($(this).text());
});
});
});
Demo: Fiddle
Problems were:
tables automatically have tbody elements inserted into the DOM, so you should not reference TR's as children of a TABLE element.
You referenced a non-existant text property instead of the jQuery text() function.
You probably want to reference the tds anyway (and probably only a specific TD in each row), as returning the text of an entire row (TR) seldom makes sense in HTML.
JSFiddle: http://jsfiddle.net/TrueBlueAussie/TdGKj/1/
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch td:first-child").each(function () {
alert($(this).text());
});
});
});
The #tblSearch td:first-child selector basically says: "Find the element with id=tblSearch then search for any td elements that are the first child of their parent. Note I added a second column of dummy TDs cells to the JSFiddle so you could see this in practice.
There any many selectors for choosing specific children, which will vary based on your specific needs, but that just needs a little research of jQuery selectors
You don't need to use children at all. You can just create a selector -
$('#tblSearch tr td')
WORKING DEMO - http://codepen.io/nitishdhar/pen/Aiwgm
First you need to fix your HTML structure, place the child td elements inside each tr -
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
<div>
<input id="btnSearch" type="button" value="Search"/></td>
</div>
Now you can alert each value using this javascript snippet -
$(function () {
$('#btnSearch').click(function () {
$("#tblSearch tr td").each(function(){
alert($(this).text());
});
});
});
Note - This will alert each value separately as you needed.
First of all fix up your html and add the correct tags around the cell data
Then this should do what you're wanting:
$('table#tblSearch tr').children().each(function(){
alert($(this).text());
});
You have multiple problems in the question you provided:
Your HTML is not valid; Place a td element inside each tr
Call the correct jQuery function. Instead of using children('tr'), which it won't find because there are no tr that are children to the table element (only tbody,thead, etc), you will need to call the find() jQuery function (e.g. find('td')) and from there you will be able to get the text of the cell; however, you may also be able to find tr and get text of the whole row in that case.

Deleting Row of Table based on div id using JavaScript

Really need your help.
I have a table that can dynamically add and delete row. But the problem is I want to delete the row of the table based on div id. I mean, on one column for every row of table i have div id which are auto increment. Then, I want to delete the row based on the div id. Is that possible?
Thanks a lot.
You can do this really easy with jQuery.
http://jsfiddle.net/KWPWr/1/
$('#d2').closest('tr').remove();
Yes.
$('#row-id').closest('tr').fadeOut(200, function() { $(this).remove(); });
The above will first select the div, then find the table row it exists in, fades it out and the removes it.
If your table looks like this:
<table>
<tbody>
<tr>
<td>
<div id="01"></div>
</td>
</tr>
<tr>
<td>
<div id="02"></div>
</td>
</tr>
</tbody>
</table>
You can use document.getElementById(DIVID).parentNode.parentNode to access the <tr> Element.

JQuery update table cell and add new table rows

A newbie question,really.
Suppose I have a html table like this:
<div id="div1">
<table id="table1" border="1">
<tr>
<th bgcolor="#eee"><strong>ID</strong></th>
<th bgcolor="#eee"><strong>Price</strong></th>
</tr>
<tr>
<td id='id1'>1111</td>
<td id='id2'>2222</td>
</tr>
</table>
</div>
Now I am using Jquery to get data in json format from server, like this:
id1,19.99
id2,29.99
id3,39.00
What I want to achieve is: Look at the data, if the id already exist in table, update the cell value. If id doesn't exist in the table, add a new row. How do I do that in JQuery? I just started to learn JQuery. Now I can use ajax call to get the data, but don't know how to update the table. Any help is appreciated.
To see if a cell exists, you must test the .length of its selector:
$('#'+str).length; // zero if there is no such ID
Or you can just update the contents of that cell with .text(), which will fail if the ID doesn't exist:
$('#'+str).text(newvalue);
To create a new row, you can .append() it to the table:
$('table tr#id_of_row').append('<td id="'+str+'">'+newvalue+'</td>');
You can get a cell by id like this
$('#'+id).length //length will be 0 if not found or 1 if found
Update the value using
$('#'+id).text(new_value);

Highlighting columns in a table with jQuery

I have a table and I am highlighting alternate columns in the table using jquery
$("table.Table22 tr td:nth-child(even)").css("background","blue");
However I have another <table> inside a <tr> as the last row. How can I avoid highlighting columns of tables that are inside <tr> ?
Qualify it with the > descendant selector:
$("table.Table22 > tbody > tr > td:nth-child(even)").css("background","blue");
You need the tbody qualifier too, as browsers automatically insert a tbody whether you have it in your markup or not.
Edit: woops. Thanks Annan.
Edit 2: stressed tbody.
Untested but perhaps: http://docs.jquery.com/Traversing/not#expr
$("table.Table22 tr td:nth-child(even)").not("table.Table22 tr td table").css("background","blue");
Here is some code I used to do nested checkbox highlighting within a table. I needed to be able to do a "check all/uncheck all" but only within at a single level within the nesting; that is, I didn't want child elements getting selected as well.
var parentTable = $(this).parents("table:first");
var exclusions = parentTable.find("table :checkbox.select");
var checkboxes = parentTable.find(":checkbox.select").not(exclusions);
I'd get the first table above the current one I was in, get all the checkboxes below this newly found parent table, then exclude them from the complete list of checkboxes I could find. Basically, I was finding every checkbox, but then excluding any child checkboxes I found.
The same could be adapted in your case; replace the checkbox selection with columns instead.
Why not to use the advantages of html ?
Instead of
<table>
<tr>
<td>
...
</td>
</tr>
</table>
Try
<table>
<tfoot>
<tr>
<td>
...
</td>
</tr>
</tfoot>
<tbody>
<tr>
<td>
...
</td>
</tr>
</tbody>
</table>
You can use the <thead> tag too to manipulate headers.
And now you can call the selector on
$("table.Table22 tbody tr td:nth-child(even)").css("background","blue")
Did you test the following?
$("table.Table22 tr td:nth-child(even):not(:last-child)").css("background","blue")
This page defines a nice function for selecting a column
http://programanddesign.com/js/jquery-select-table-column-or-row/

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