Develop Reference

How to get value from GridView cell with Javascript

I'm trying to get a value from a GridView cell to change the source of an embed PDF. I execute a function when a button that is placed on each row of the GridView is clicked.
This is the code I have so far:
<script>
function changepdf(pdf) {
var value = document.getElementById('<%= GridView1.ClientID %>').rows[pdf.rowIndex].cells[3].innerText;
var file = document.getElementById('pdf');
file.src = 'pdf/catalogosh.pdf#page=' + value + '&#toolbar=0&#view=fit';
return false;
}
</script>
The Javascript function works fine when I write exactly the new source like this:
<script>
function changepdf(pdf) {
var file = document.getElementById('pdf');
file.src = 'pdf/catalogosh.pdf#page=4&#toolbar=0&#view=fit';
return false;
}
</script>
The main idea is to change the PDF page taking the value from de GridView.
Thanks in advance for any help.

I've just solved it. I'm pasting the code here for anyone that's trying to solve the same problem:
function changepdf(pdf) {
var row = pdf.parentNode.parentNode;
var rowIndex = row.rowIndex;
var value = document.getElementById('<%= GridView1.ClientID %>').rows[rowIndex].cells[2].innerText;
var file = document.getElementById('pdf');
file.src = 'pdf/catalogosh.pdf#page=' + value + '&#toolbar=0&#view=fit';
return false;
}
My problem was the rowIndex. The code was bad and I was getting the wrong value.
I added this two lines to get it well:
var row = pdf.parentNode.parentNode;
var rowIndex = row.rowIndex;
And then I got the cell value with this line:
var value = document.getElementById('<%= GridView1.ClientID %>').rows[rowIndex].cells[3].innerText;

get all checked checboxes and add their names and values in array

I have large form mainly drop down lists and checkboxes. Checkboxes are created dynamically so i don't know their id's before they are created. I use drop down onChange event to do create them on the fly.
How can i loop trough the form and get all the checkboxes that are checked, that is their id and their value? I need to do this only for check boxes that are checked. All checkboxes share the same name, that is: categoriesfilters[]. Currently i have on click event on the checkbox which invoke the javascript function.
Here is the code:
function update_number_of_adds_found(field_dropdown,selected_value) {
selected_value="";
var addtypeid = $("#addtypeid").val();
// trying to store the values of the checkboxes
$(this).find("input[type=checkbox]:checked").each(
function() {
var id = $(this).attr('id');
var value = $(this).val(); // or maybe attr('value');
// the data is stored, do whatever you want with it.
alert(value);
}
);
var selected_value = {
addtypeid: addtypeid,
// need to add the ids and the values here as well
};
var url = "<?php echo site_url('search/findNumberOfAdds'); ?>";
$.post(url, selected_value, function(r){
if(r) {
$('#totalNumOfAdds').empty();
$("#totalNumOfAdds").append(r.result);
} else {
// alert(selected_value);
}
}, 'json')
}
Regards, John

Try this :
var categories = [];
$("input[name='categoriesfilters[]']:checked").each(
function() {
var id = $(this).attr("id");
var value = $(this).val();
categories[categories.length] = {id : value};
}
);
console.log(categories);
$.post(url, categories, function(r){
...

Try this :
$('form').submit(function(){
$(this).find("input[type=checkbox]:checked").each(
function() {
var id = $(this).attr('id');
var value = $(this).val(); // or maybe attr('value');
// the data is stored, do whatever you want with it.
}
);
});
I guess you want to check that on form submit.

var arr = [];
$('input[name^="categoriesfilters"]:checked').each(function() {
var obj = {
id: $(this).attr('id');
value: $(this).val();
};
arr.push(obj);
});
console.log(arr); // show us the array of objects

Would you like to use Jquery?
Add a class to each of the checkbox i.e "class_chk";
$(function(){
$('.class_chk').each(function(){
if($(this).is(':checked')){
var id = $(this).attr('id');
var val = $(this).val();
alert("id = "+id+"---- value ="+val);
}
});
});
The above way you can get all the check box id and value those are checked.
Thanks..

Date entries in the array are not printed

I've just created an dynamic HTML form and two of its fields are of type date. Those two fields are posting their data into two arrays. I have 2 issues:
a) The array data are not printed when I press the button.
b) Since I created the arrays to store the data, my dynamic form doesn't seem to be fully functional. It only produces new fields when I press the first "Save entry" button on the form. It also doesn't delete any fields.
My code is:
$(document).ready(function () {
$('#btnAdd').click(function () {
var $address = $('#address');
var num = $('.clonedAddress').length;
var newNum = new Number(num + 1);
var newElem = $address.clone().attr('id', 'address' + newNum).addClass('clonedAddress');
newElem.children('div').each(function (i) {
this.id = 'input' + (newNum * 10 + i);
});
newElem.find('input').each(function () {
this.id = this.id + newNum;
this.name = this.name + newNum;
});
if (num > 0) {
$('.clonedAddress:last').after(newElem);
} else {
$address.after(newElem);
}
$('#btnDel').removeAttr('disabled');
});
$('#btnDel').click(function () {
$('.clonedAddress:last').remove();
$('#btnAdd').removeAttr('disabled');
if ($('.clonedAddress').length == 0) {
$('#btnDel').attr('disabled', 'disabled');
}
});
$('#btnDel').attr('disabled', 'disabled');
});
$(function () {
$("#datepicker1").datepicker({
dateFormat: "yy-mm-dd"
}).datepicker("setDate", "0");
});
var startDateArray = new Array();
var endDateArray = new Array();
function intertDates() {
var inputs = document.getElementsById('datepicker1').value;
var inputsend = document.getElementsById('datepicker2').value;
startDateArray[startDateArray.length] = inputs;
endDateArray[endDateArray.length] = inputsend;
window.alert("Entries added!");
}
function show() {
var content = "<b>Elements of the arrays:</b><br>";
for (var i = 0; i < startDateArray.length; i++) {
content += startDateArray[i] + "<br>";
}
for (var i = 0; i < endDateArray.length; i++) {
content += endDateArray[i] + "<br>";
}
}
JSFIDDLE
Any ideas? Thanks.

On your button you are using element ID's several times, this is so wrong, IDs must be unique for each element, for example:
<button id="btnAdd" onclick="insertDates()">Save entry</button>
</div>
</div>
<button id="btnAdd">Add Address</button>
<button id="btnDel">Delete Address</button>
jQuery will attach the $('#btnAdd') event only on the first #btnAdd it finds.
You need to use classes to attach similar events to multiple elements, and in addition to that simply change all the .click handlers to .on('click', because the on() directive appends the function to present and future elements where as .click() only does on the existing elements when the page is loaded.
For example:
<button id="btnDel">Delete Address</button>
$('#btnDel').click(function () {
[...]
});
Becomes:
<button class="btnDel">Delete Address</button>
$('.btnDel').on('click', function () {
[...]
});

Try this : I know its not answer but it's wrong to get element value using id
Replace
var inputs = document.getElementsById('datepicker1').value;
var inputsend = document.getElementsById('datepicker2').value;
With
var inputs = document.getElementById('datepicker1').value;
var inputsend = document.getElementById('datepicker2').value;

You are using jQuery so i will strongly recommend you to stick with the jQuery selector,
var inputs = $('#datepicker1').val();
var inputsend = $('#datepicker2').val();
where # is used for ID selector.

jquery function select custom attribute from select box

I am trying to get the custom attribute values from the select box. It is triggered by a checkbox click which I already have working. I can get the name and value pairs just fine. I want get the custom attributes (therapy) (strength) (weight) and (obstacle) from the option value lines. is this possible?
select box
<option value="2220" therapy="1" strength="1" weight="0" obstacle="0">Supine Calf/Hamstring Stretch</option>
<option value="1415" therapy="0" strength="0" weight="0" obstacle="0">Sitting Chair Twist</option>
<option value="1412" therapy="0" strength="0" weight="0" obstacle="0">Static Abductor Presses</option>
jQuery
// exercise list filter category
jQuery.fn.filterByCategory = function(checkbox) {
return this.each(function() {
var select = this;
var optioner = [];
$(checkbox).bind('click', function() {
var optioner = $(select).empty().scrollTop(0).data('options');
var index=0;
$.each(optioner, function(i) {
var option = optioner[i];
var option_text = option.text;
var option_value = parseInt(option.value);
$(select).append(
$('<option>').text(option.text).val(option.value)
);
index++;
});
});
});
};

You need to find the selected , like this:
var $select = $('#mySelectBox');
var option = $('option:selected', $select).attr('mytag');

That is how to get selected option attribute:
$('select').find(':selected').attr('weight')

Get selected option and use attr function to get the attribute:
$("select").find(":selected").attr("therapy")
JSFIDDLE

can't get the dynamic textfield value using Jquery

I can't get the dynamic textfield value. Please see the below my jquery code.
I added onclick event while creating the textfield for LandMark. Please see the below code.
I am always getting undefined. Please help me.
function dynamicEvent() {
alert("dynamic event");
$(document).ready(function(){
alert("inside ajax --> dynamic");
var table = document.getElementById("dataTable");
alert("table-->"+table);
var rowCount = table.rows.length;
alert("rowCount-->"+rowCount);
alert("value of rowCount"+rowCount);
var uniqueId;
for (var i=rowCount;rowCount>7;i++){
uniqueId = i;
alert("inside for loop");
alert("uniqueId-->"+uniqueId);
var element = document.createElement("input");
uniqueId=uniqueId-1;
element.id = "t02Travelfrom" +uniqueId;
var tfrom=element.id;
alert("tfrom id-->"+tfrom);
var t02Travelfrom=$("tfrom").val();
alert(tfrom+"--value-->" +t02Travelfrom);
}
});
}

You have incorrect selector:
var t02Travelfrom=$("tfrom").val();
change to:
var t02Travelfrom=$("#" + tfrom).val();

$("tfrom") returning elements with tag tfrom
You need $(tfrom). You don't need double quotas.