i have a question for you with no code :)
I have a Struts2 Web Application composed by several tiles. The main tile called content, show the interface for the business use case currently in use.
In one case, I have a content tile composed by only some Jquery accordion and one button "Add". On the action linked to the tiles, I have a collection of oblects. When the tile is open by the user, i loop trouhg the collection to create on accordion 8the relation is 1 to 1).
The Add button add an entry into my collection. After the add, I am aspecting to see another accordion on the page.
Is there a way to refresh the tiles withpout he entire page??
Yes one way is have an action return json, the struts2-json-plugin makes this very easy.
See: https://cwiki.apache.org/confluence/display/WW/JSON%20Plugin
Handling the json on the client side then becomes a JS/JS library question.
Related
All, I am new to Windows 7 Phone. My situation is that I have a main page which contains a ScrollViewer which in turn houses a StackPanel. I want to populate this StackPanel with multiple sub-StackPanels (at runtime) which are to hold an Image Thumb nail a hyperlink and some basic information about the image.
This is all good when I do this from the main page, but I want to know how to update this control (which is on the main page), but from any page other than the main page. I would like to know what is considered best practice for updating a page's control (like that outlined above) from another page.
Obviously there are a number of ways to pass data between pages
PhoneApplicationService.Current.State["yourparam"] = param
NavigationService.Navigate(new Uri("/view/Page.xaml", UriKind.Relative));
then in other page simply
var k = PhoneApplicationService.Current.State["yourparam"];
and many others. But what is best practice for updating a generic control from a different page?
Note: There are many question about data access and passing between pages.
Passing data from page to page
How to pass the image value in one xaml page to another xaml page in windows phone 7?
Passing image from one page to another windows phone 7
and more. This is not what I am asking.
If I understand your question correctly, you are trying to update a control which is on for example MainPage.xaml from another page for example Page2.xaml.
As far as I know there is no way to reach a pages controls from another page, and that seems unnecessary for the cases that I can think of.
The method used to achieve what you are trying is usually done by triggering an action (like the press of a button ) and passing a parameter to the page you are trying to update the control. And on that page's onnavigatedto event (or viewmodel constructor if you are using the MVVM pattern), update your control based on the passed parameter.
If your update is based on data then the best practice is to bind an observable collection or an object that extends the INotifyPropertyChanged (basically any object that can signal that one of their property changed to the ui) and change the data based on the parameter that is passed.
If these two pages somehow are visible at the same time and there is no navigation needed between them( like a popup or sliding menu kind of ui) then you can make the page that you are showing in the popup a usercontrol, and reach to the parent's controls by this.Parent.
I can be more helpful if you give more specifics about your app's flow.
The MVVM pattern would be a good way to go. Saying MVVM is too complicated for small teams isn't exactly accurate - the purpose of MVVM is to decouple Silverlight or WPF code. Using the codebehind of a Silverlight page to directly access data creates coupling in your code and accrues technical debt. Whether you're one developer or 100, if your UI is coupled with your data classes, if you have to change your data classes, you will have to make changes to every UI element that uses those classes. This takes longer and makes your application more difficult to change.
MVVM makes it so your UI (the View) doesn't know anything about the data (your Model). The ViewModel is the code in between that the UI can bind to, and which manages events in the UI that need to be persisted to the Model, and also changes in the Model that need to be represented in the View. For this reason, it handles events, and that's what it sounds like you need in your code - an event that can exist off of the codebehind, that can update the Views bound to it when the data changes. If you have two pages, then an event on one of the pages will be sent to the ViewModel, which will make a change to the Model (data) if necessary, and pass it back to the ViewModel. The ViewModel would then update any of the UI elements (Views) bound to that piece of data.
There's a REALLY good demonstration of how to implement the MVVM design pattern here
. The guy goes through and takes a typical WPF application (just like Silverlight), where the UI codebehind implements event handlers that directly access data, and refactors it using the MVVM pattern.
I am buiding a UI screen for editing the details of an Ecommerce Order. The model for my view (OrderModel) has everything I need (in properties that are also ViewModels), but the UI isn't designed to be able to edit all of it at once.
For example, one part of the UI is for customer data..another for order details, and another for tracking information, each having their own "Save" buttons.
I realize that I could use one giant form and use hidden form fields to populate the non-editable fields, making each "Save" button post all the data, but that smells bad.
I'd like to segment the editable chunks into smaller ViewModels that are posted and validated individually while retaining the strong typing but I'm unsure of how to achieve this in MVC3. Will I need partial views that are called from the primary view?
FYI, I'm using ASP.NET MVC 3 with Razor syntax and client side FluentValidation.
Partial Views are a good solution. You can pass different ViewModels to each partial view. But if only sections of the overall view are updated at a time I would not do a post back on the whole page. Instead I would use Ajax calls using JQuery/Javascript to update the individual information back to the controller. I would also look into something like Knockout.js to handle the data binding on the page.
I am completely new to ASP.NET MVC, so the question might sound silly.
I have a view that should display a part of the data from it's model at a time. And there are buttons that should trigger which part of the data gets shown.
So far, I have encapsulated each part of the data into a div and added buttons. I have also added a function that returns CSS style for a given id (basically, it returns display:visible or display:none).
I assume that I'll be able to wire up event handlers for buttons. But I am completely stuck at redrawing/updating of div elements. I mean I don't understand how should I cause divs to update their style.
Could you please help me to show/hide div elements and buttons dynamically?
That should be standard javascript (or in your case jquery). It is unrelated to MVC3. Once you have the view built that includes all your divs with content, you call $('#div_id').show() or $('#div_id').hide() to show or hide. You can also use many other methods that have related animations, but that should get you started.
http://docs.jquery.com/Tutorials:Basic_Show_and_Hide
Like this:
$('buttonClass/IDhere').click(function (){
$('theDivYouWantToShowClass/IDhere').toggle();
});
I have one view page in MVC named as ‘Index’. There are 3 main controls in that view page. For better understanding, take below example as reference.
1. One Dropdown ‘Customer’
2. One Dropdown ‘Project’ (that depends on ‘Customer’)
3. List of Task (that depends on ‘Project’).
Currently first user needs to select ‘Customer’. So based on customer ‘Project’ dropdown data will be fetched from post method of Index and bind that ‘Project’ dropdown. After selecting ‘Project’, List of task will be fetch from post method of Index and bind those tasks. So every time page is loaded again.I want to do it by Ajax form submit.
My problem – those 3 controls are in one view page so I want to return page view using Ajax without using Partial View. Is this possible? If yes then how? Or any other solution so that I am able to display data without reload whole page again.
If u can give me example of such scenario then it will be good.
I have a request concerning Drupal 6.x
I'd like to have this behaviour:
imagine to have 2 columns, on the left a list of nodes (only titles for example) and on the right a view showing just one of the contents on the left.
My idea would be to achieve this with an AJAX-fashion: clicking a link in the list on the left updates the view on the right with the actual node.
Which is the best way to handle this?
My idea is to use Panels, make 2 column panel with 2 views, one (left) filtered on content type, with no arguments, and one on the right which takes in as an argument the node id to be displayed.
But how to link the 2 views with AJAX?
(or, better, how to update the view on the right with an AJAX call?)
is this possible?
Any help or idea is really welcome
Thanks!
Cheers
Mauro
You also can do a quick hack, which is quite flexible, because it allows you to change your views without changing code.
I have had a similar task recently and for your task I would do the following:
for your right column, create a exposed filter (node id) and hide whole exposed filter form using CSS.
using jQuery, attach a click behavior to titles on your left column.
the click behavior takes the node id, finds the attached exposed filter at the right column, enters the node id into the input field and executes form's .submit().
the .submit() triggers the build-into-views well debugged ajax request which refreshes your right column.
this is certainly possible, and not very difficult to do.
Your task can be divided into two main parts:
Providing a 'callback' URL in the Backend that takes a node id (nid) and returns the markup to display the node in the right panel in a format that can be processed by javascript. This will be done in PHP within a normal Drupal module. The main point is not to return a full Drupal page as usual, but only the markup for the node.
Create logic for the Frontend that, when triggered by clicking a link in the left panel, retrieves the new node markup via the URL callback above and replaces the content of the right panel with it. This needs to be done in javascript, using the Drupal javascript API with jQuery.
You can find an introduction and example for AJAX in Drupal here. (This does almost exactly what you want to do, only with images)
You should also look at this more general entry point for JavaScript in Drupal.