Bootstrap Dynamic Modals With AJAX Calling - ajax

I'm using codeigniter v3 and bootstrap v3.
I've a table for messages and for every message in table, when click on details button, a bootstrap modal show the details.
In a for loop, I print table rows and for every row (at end of the loop), I put whole bootstrap modal structure.
My question is: how could do this with ajax calling? I mean, I don't put all modal code for every table row (every message) and every time that details button clicked, I handle showing modal with ajax.
thanks for attention.
SOLVED:
I find an easy and I think better way in the bootstrap official website: Using data- attribute.
I show it with an working example for who that could not achieve better solution:
Suppose we want to fill a table body with some data (as my problem):
//just table body code
<tbody>
<?php foreach($fields as $field): ?>
<tr>
<td><?php $field->some_field; ?></td>
//other <td> elements
<td>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal"
data-time="<?php echo $field->time; ?>">Show Details</button>
</td>
</tr>
<?php endforeach; ?>
</tbody>
So in a loop, I read data (that in controller, get with model's method, and pass to view with $data['fields']). Now for showing some details in modal, I use HTML5 data attribute. Suppose, I want to show time in the modal. As you see in above code, I put time field in data-time:
data-time="<?php echo $field->time; ?>"
Now I create a modal as template (you could see whole modal structure in bootstrap official website) and put it out of loop (one modal for all table rows; dynamic data). in the following code, I put an element in the modal body (as a placeholder):
//... in the modal body section
<h4 id="time"></h4>
This element have no content, because I want to retrieve every row time filed and put it in this element. Note this will be practical with defining an id. Now some script:
//first load jquery
<script type="text/javascript">
$(document).ready(function(){
$('#myModal').on('show.bs.modal', function(event){
var btn = $(event.relatedTarget); // find which button is clicked
var time = btn.data('time'); //get the time data attribute
$('#time').text(time); //put the data value in the element which set in the modal with an id
});
});
</script>
You could define more data attribute and retrieve in this way.

I will not write the code for you, but show you the way:
You just need one modal for the whole page and it works like a template.
You need same data/informations to be displayed in the modal. This data you can pick up via Javascript/jQuery from your HTML. I prefer data attributes for that. Something like:
data-modal-title="My Title" data-modal-content="My Content"
Now you inject this data in your modal template and open the modal via Javascript.

Related

Scripts not working on partial view after Ajax call

I have called scripts on _Layout.cshtml page and my Index.cshtml page has partial view into it. So on page load, SignalR scripts working perfect on partial view, on page end I make another ajax request and load the partial view with another data filled in that and embed under already displayed data, and then the SignalR does not work on the newly embedded record.
This is my index page code:
<div class="col-md-6">
<div class="profile-body">
<div class="row infinite-scroll">
#Html.Partial("_AlbumRow", Model)
</div>
</div>
</div>
This is my partial View Code:
#model IEnumerable<SmartKids.Lib.Core.ViewModels.FileMediaAlbumsVM>
#foreach (var item in Model)
{
<div class="widget">
<div class="block rounded">
<img src="#Url.Content(item.ImageUrl)" alt="#item.Title">
<input type="button" data-image-id="#item.imageId" class="btn btn-sm btn-default">Like</input>
</div>
</div>
}
Kindly help me how to resolve this issue that after making an ajax request I am not able to get those SignalR working. Here is more to say when I put the SignalR scripts on PartialView that works but it also sucks that on each ajax request there is again SignalR loaded on the page and when I click on LIke button it makes many calls to the function behind it.
Kindly help me to resolve this issue, I am stuck at this point since 1 week.
Here is signalR Code:
$(".btn.btn-sm.btn-default").on("click", function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(imageId);
});
Problem: You are binding event to elements directly, So when you remove this element and replace it with a different one the events are also removed along with that element, This is something like strongly coupled.
Solution: Use Jquery event delegation. This will make sure the events will be triggered on the current elements and also all the elements that can come in future.
syntax is as below.
$(document).on("click", ".btn.btn-sm.btn-default",function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(iamgeId);
});
NOTE: This was never a singlaR issue, it was Jquery issue.
Efficient Way: The problem in using $(document).on("click"... is that when ever there is a click happening on the entire page the Jquery framework will bubble the events from the clicked element upwards(its parent, and its parent and so on..) unless the element specified in the selector arrives, So its kind of performance hit as we don't want this check's to run if we are clicking outside the required area ( button .btn.btn-sm.btn-default in this example).
So best practice is to bind this event delegation to the closest parent possible which will not be removed, <div class="row infinite-scroll"> in this question. So that only when the click happens within this element the event bubbling will happen and also will be stopped once it reaches the parent element,it acts kind of a boundary for event bubbling.
$('.row.infinite-scroll').on("click", ".btn.btn-sm.btn-default",function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(iamgeId);
});

jQuery mobile: data-search value returns empty unless I reload the page

jQuery Mobile 1.3.2: I have a listview with the filter enabled. The page that this is on is loaded via jQuery mobile ajax.
My problem is that if I allow it to load via ajax, it detects my keyup event but it does not pull the value of input[data-type="search"]. If I refresh the page using the browser, the script executes perfectly.
How can I get this to work while loading the page with AJAX?
HTML MARKUP:
<ul id="addCompany" style="padding-bottom:10px;" data-role="listview" >
<li>Touch To Add</li>
</ul>
<div id="listwrap">
<ul data-role="listview" data-autodividers="true" data-filter="true" data-inset="true">
<li>Adam Kinkaid</li>
</ul>
</div>
jQuery
<script>
$(document).ready(function(){
var inputVal;
$('body').on("keyup",'input[data-type="search"]', function(){
inputVal = $('input[data-type="search"]').val();
if(inputVal===""){
$('#dynamic').html('<li>Touch To Add</li>');
$('#dynamic').listview("refresh");
}else{
$('#dynamic').html('<li>Touch Again To Add: '+$('input[data-type="search"]').val()+'</li>');
$('#dynamic').listview("refresh");
}
});
});
</script>
EDIT: Note that I can set the value and set the focus on input[data-type="search"] without any hiccups. It is retrieving the value that seems so tricky.
I tried adding a class to so that I wouldn't have to call it by data attribute but still couldn't pull the value unless I refreshed the page. Maybe if I inject a function into the input element I can use that to return the value?

How to update a label from a postback in MVC3/Razor

MVC/Razor/Javascript newbie question:
I have a MVC3/Razor form where the use can select a single product from a drop down list.
<div class="editor-label">
Product
</div>
<div class="editor-field">
#Html.DropDownList("ProductID", (IEnumerable<SelectListItem>)ViewBag.Products, "--Select One--")
#Html.ValidationMessageFor(model => model.ProductID)
</div>
What I then want is to display the price of the selected product on a label just below the drop down list (model property name is Amount).
This should be pretty easy, but I am pretty new at Razor, and know almost nothing about Javascript, so I would appreciate any verbose explanations of how do do it, and how it all hangs together.
Add a div/span under the Dropdown .
#Html.DropDownList("ProductID", (IEnumerable<SelectListItem>)ViewBag.Products, "--Select One--")
<div id="itemPrice"></div>
and in your Script, make an ajax call to one of your controller action where you return the price.
$(function(){
$("#ProductId").change(function(){
var val=$(this).val();
$("#itemPrice").load("#Url.Action("GetPrice","Product")", { itemId : val });
});
});
and have a controller action like this in your Product controller
public string GetPrice(int itemId)
{
decimal itemPrice=0.0M;
//using the Id, get the price of the product from your data layer and set that to itemPrice variable.
return itemPrice.ToString();
}
That is it ! Make sure you have jQuery loaded in your page and this will work fine.
EDIT : Include this line in your page to load jQuery library ( If it is not already loaded),
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
The Amount isn't available to your view when the user selects a product (remember the page is rendered on the server, but actually executes on the client; your model isn't available in the page on the client-side). So you would either have to render in a JavaScript array that contains a lookup of the amount based on the product which gets passed down to the client (so it's available via client-side JavaScript), or you would have to make a callback to the server to retrieve this information.
I would use jQuery to do this.
Here's a simple example of what the jQuery/Javascript code might look like if you used an array.
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
$(document).ready(function() {
// This code can easily be built up server side as a string, then
// embedded here using #Html.Raw(Model.NameOfPropertyWithString)
var list = new Array();
list[0] = "";
list[1] = "$1.00";
list[2] = "$1.25";
$("#ProductID").change(displayAmount).keypress(displayAmount);
function displayAmount() {
var amount = list[($(this).prop('selectedIndex'))];
$("#amount").html(amount);
}
});
</script>
<select id="ProductID" name="ProductID">
<option value="" selected>-- Select --</option>
<option value="1">First</option>
<option value="2">Second</option>
</select>
<div id="amount"></div>
You'll want to spend some time looking at the docs for jQuery. You'll end up using it quite a bit. The code basically "selects" the dropdown and attaches handlers to the change and keypress events. When they fire, it calls the displayAmount function. displayAmount() retrieves the selected index, then grabs the value out of the list. Finally it sets the HTML to the amount retrieved.
Instead of the local array, you could call your controller. You would create an action (method) on your controller that returned the value as a JsonResult. You would do a callback using jquery.ajax(). Do some searching here and the jQuery site, I'm sure you'll find a ton of examples on how to do this.

Getting instant ajax responce

I think there is a way to do this in ajax. But if you have a better way please let me know.
I have this code:
$interactionBox= '<input type="button" value="Pending Friend Requests('.$num_rows.')" onclick="return false" onmousedown="javascript:toggleInteractContainers(\'friend_requests\');"/>';
This code opens up a togle box where user can accept friends if there is a pending request.
So if button looks like this:
Pending Friend Request(1)
And user accepts that request user has to refresh the page for this to show as:
Pending Friend Request(0)
Is there a way to do this without refreshing the page using ajax or any other way?
Here is HTML for above code:
<div class="interactContainers" id="add_friend">
<div align="right">cancel </div>
Add <?php echo $username; ?> as a friend?
Yes
You can just get the value between brackets with JavaScript and then reduce by 1,
You can get that value (if it isn't a variable get via regexpresion:
var button = document.getElementById('buttonid'); // fill in the id
button.value = "Pending Friend Requests("+ (parseInt(button.value.match(/\d{1,10}/)) - 1) + ')';
just excute that after each accept (or not-accept)
note you should just use the function in onclick, it's not a link so it will only excute the javacript bit: so no onmousedown just onclick="javascript:toggleInteractContainers(\'friend_requests\');"
look ma: no jQuery!

Best way to add a dynamic amount of elements to a form?

I have a complex form that has a static section and one that can have from 0 to many divs that containing radio buttons, textfields and textareas.
I'm wondering what's the best way to add elements to the section that has a variable amount of form inputs. I have a working solution, but it's probably not the best:
I use javascript to add a chunk of html code and append it to the div containing the variable amount of input fields. In the code sample below, my javascript code would do something like
Javascript
document.getElementId('dynamic_form_stuff').innerHTML += "<div id='element3'>Form stuff</div>";
HTML
<form>
<div id="static_form_stuff">
form fields
</div>
<div id="dynamic_form_stuff">
<div id="element1">
Radio buttons stuff
Text field stuff
Text area stuff
</div>
<div id="element2">
Radio buttons stuff
Text field stuff
Text area stuff
</div>
</div>
</form>
I think this largely depends on what you are doing elsewhere, and how many items you are adding, as well as how you want to add event handlers.
I tend to find it easier to use the DOM methods if I need to add event handlers, but if you are just adding to a form with a submit button, then using innerHTML is faster, as shown here: http://www.quirksmode.org/dom/innerhtml.html.
I would personally do something like:
var elem = document.getElementId('dynamic_form_stuff');
var div = document.createElement('div'); // create element
div.setAttribute('class', 'myclass'); // define attributes
elem.appendChild(div);
// and/or more code.....
This gives me more control in adding attributes and style there.

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