A single-page application SPA is a web application in which a single root view page will be loaded from the server and then, based on the user interaction, the application will dynamically update the content on the client-side without any page reload. SPAs are more fluid and responsive than conventional multipage applications and they are best suited for creating SaaS Software as a Serviceenterprise dashboards, and other form-driven web applications.
Fetch the entire client-side UI or view from the server during the initial load.
Single Page Applications: When and Why You Should Use Them
Then, based on the user interactions or navigation through the application, the UI will be refreshed dynamically at the client-side. SPA uses minimum bandwidth to contact the server to update the data from user interactions, and to fetch the updated data while refreshing the webpage. Single-page applications are more fluid and responsive than multipage applications.
Due to this, these applications are also well suited for mobile devices, with no need to build a separate native mobile application. SPA supports rich interactions with multiple components, such as editors and pop-ups, on the view page. These components may have intermediate states that can be harder to implement with server-side rendering. There are no page refreshes while a user navigates the application, making the application more comfortable to use in mobile devices.
As the view layer and data layer are maintained separately in the SPA, this will be much easier to deploy it in production. Single-page applications maintain state using URLs or track states internally while a user navigates through the application. That person can be sure that anyone opening that link will see the exact same content by the navigating to the exact URL in the application. SPA uses minimal bandwidth for contacting the server for fetching data or for updating the data model after the user interaction in the application.
Based on the user interactions, the data is updated to the data model in the server. And these data changes are refreshed back to the UI simultaneously, thereby making the user always able to view an updated webpage without refreshing it. SPA is known for their fast and seamless responses to user interaction.
Their rich interfaces handle the user action and refresh the UI dynamically without any delay or request from the server. They can thereby avoid interruptions in the experience and make the web app behave more like a desktop application.
The view file along with the CSS bundle that holds the UI rendering for the application and the data layer of the application are well maintained separately in the SPA architecture.
The separation of the view and data layer is intended for the user to reuse the view page for different data sets or alter the view page without affecting the data model in production. The view and data layer separation in SPA eases the versioning and rollback vows in the production. These are some of the real-world single-page application examples built using Essential JS 2 controls.
Expense tracker — SPA. The different webpages in the application, Dashboard, Transactions, and About, use the DataGridChartsand other Essential JS 2 controls for visualizing the data model. This application uses a page routing mechanism for page transitions to navigate among views.
Users can navigate among these views using the URLs, which will be created for each webpage because of routing. Since this application is built using SPA architecture, all the webpages will be downloaded at the initial loading of the web application.
Then the page transitions will happen completely on the client-side without requesting any webpages of the server. While navigating to different views, the URL of the application will be updated accordingly. Data binding has a major role in SPA.
A Beginner's Guide for Creating Single Page Applications using Backbone.js and Marionette.js
Since all the webpages are downloaded at client-side, the UI components should be refreshed with the updated data then and there. While performing any editing action in the Transaction webpage, the changes will be updated to the data model simultaneously. These changes will be reflected in the UI components available in other pages, too. Since SPA are well suited for rendering both in desktop browsers and mobile environments, this application is built with a fluid and responsive design for rendering in mobile devices.
Expense Tracker — Mobile view. Web Mail is a single-page application example with an Outlook-like user interface built for managing a mailbox. This application is built with rich interfaces and an interactive design using Syncfusion components like the AccordionListViewand Sidebar as a single-view webpage.
Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. Everything works perfectly Is my Dispose implementation good enough?
Should I avoid it because it's never going to be called? WaitOne TimeSpan.
Tutorial: Create your first WPF application in Visual Studio 2019
Zero, false ;? In case of multithreading I mean In OnStartup override OnStartup e ; even if another instance is already running and I'm going to shutdown the application? Is there a better way to bring the existing instance to the top that doesn't need to set Topmost value? Maybe Activate?
Can you see any flaw in my approach? Something concerning multithreading, bad exceptions handling and something like that? For example This might be against the spirit of Code Review, but you don't need to write your own single instance manager for WPF! Microsoft has already written code to accomplish thisbut it has been poorly advertised.
Microsoft's single instance manager is extremely comprehensive, and I have yet to find any issues with it. And if you don't want to use it, it can at least be a good reference for your own implementation. Step 2: Add this single instance class to your project.C# WPF Tutorial - Multiple Views
App option. Step 5: Define a Main method in App. Step 6: Right-click on App. If you don't want anything to happen when a single instance is launched, you don't need to modify the sample code above. Rather than doing nothing when a user attempts to open a second instance of the program, it's often beneficial to Activate the original window and change its window state to WindowState.We all know that Microsoft is trying everything it can to modernize the SharePoint experience for its users.
The main reason behind this is to give consumers the freedom to customize the SharePoint they use. Another advantage of opting for a modern look over the classic look is that it is responsive in nature. Microsoft handles it for you. This is because it lets you create custom apps for your SharePoint and it is easier to develop and deploy the application packages. After creating the SPFx project, open your code editor and navigate to your project directory.
You can see that yeoman has beautifully created your project structure. What is a Single Page Application?
Router takes care of the path to redirect a particular component. Open the command prompt and go to your project directory. You can design the Application layout as you wish. Create a separate folder for each of your components. Path The URL path where you want to render your component.
Exact It is used to tell the application to strictly render the component only if the path is the same as mentioned. Component Here you can define which component to render and where to render. The whole SinglePageApp.
Click different components to see the routing changes. We have created our Single Page Application successfully. Follow me to catch up with articles on SPFx and React. View All. Vidhya Vaidhyanathan Updated date Sep 17, Again, this will leave us with a question of why SPFx.
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Next Recommended Article.In this article, we will discuss about the backbone. It was a long time ago almost a decade back when most software applications were getting built as standalone applications. These applications were targeted at a single user and ran on their operating systems. Then came the need to share data across multiple users and a need to store data at a central location. This need gave birth to distributed applications and web applications.
Distributed applications ran as standalone applications on the user's machine giving him a rich user interface desktop like experience to work with, and behind the scenes, these applications sent data to a server. Web applications, on the contrary, were sandboxed in a web browser and HTML and HTTP were used to let the user perform operations on the data which is stored on the remote server.
The major differentiating factor for these two applications was that the distributed applications provided an interactive user experience whereas web applications provided very limited features due to technology limitations. The downside of distributed applications was that it was very difficult to roll-out and ensure the application updated across all users. Web applications had no such problems because once the application is updated on the server, all users got the updated applications.
Both these approaches had pros and cons and something needed to be done to get the best of both worlds. This is where browser plugin based applications like Flash applications and Silverlight applications came into the picture.
These technologies filled in the gap for all the functionality not possible with HTML. They provided the possibility of creating rich internet applications that ran in the browser. The only downside of this was that the user needed to install the browser plug-in to get these applications to work. Then came the time when browsers became more capable and HTML became more mature.
In this article, we will be discussing about backbone. In this article, we will look into the basics of the backbone. It is best suited for creating single page applications using a RESTful service for persisting data.
Marionette also provides us View classes that we can create and extend simple view, collection views, and composite views. It also gives us the possibility of creating Controller classes and eventing mechanism across applications.
Logon screen and then the main application screen after successful logon. I've currently achieved this by using a navigation window and pages. I'm not sure if this is the best approach as I do not need to use the functionality provided by the navigation window Browse back and forward et cetera. I'm hoping someone could let me know if the navigation window is the best approach for this design or if a similar look can be achieved by not using pages and navigationwindow.
There are many different ways. One rather simple way is to remove some control from the visual tree and add another into it instead. The main window can be displayed after the completion of the succesful login from the first Window, and the first login window can be closed. One thing you may need to be careful of is that the app doesn't exit after the first window closes but before the second is displayed.
You can set the Application ShutdownMode property in you app. You can use Pages and navwindow if you like.
To start your project create one window xaml document and change the Window tag to a Navigation Window tag. Then within each page you can control the navigation or loading of new pages using NavigationService. If logging is not of any value for you in page navigation you can disable this in code if you need. Learn more. Asked 9 years, 4 months ago.
Active 9 years, 4 months ago. Viewed 3k times. Thanks for all your help. Emlyn Emlyn 1 1 gold badge 8 8 silver badges 21 21 bronze badges. Active Oldest Votes. Guess they were caused by still using pages.
Thanks for this but I'm really looking for this single window style rather than a logon window closing to show the main window. I appreciate I'm probably making things more difficult for myself but this is really the style I'm looking to achieve. I want it to be very similar to Windows messenger for example with the main content and the logon all shown in one window. I would use a single view model which conducts two different child view models, and just injects the appropriate one into the main window content area.This article explains a very simple and straightforward approach to create a multi-page navigation with WPF.
When working in automation, you often use HMI devices that allow you to draw graphics pages and navigate within the application using a menu. To realize a page-switch application with WPF, you can use the UserControls, which would be the pages, which are contained in a single main window. An example on how to implement the code to switch pages can be fond on this site. The code is simple, after creating a new WPF project, create a static class that will be the Switcher class that contains the Navigate method.
You can also create UserControls that requires parameters and pass parameters in an easy way between pages.
I wrote a sample application to demonstrate the use of this class, you can download it from this link.
Single Page Application Example using Essential JS 2 Components
Hi Komin, i modified the example to make parameter more clear. But you use instead of pages 1,2,3 new window. Hi Komin, i added a page where you can edit the parameter and return it. My program works well. How to do it?? Sleep 10. Read BuforIn, 0, BuforIn.
BeginInvoke DispatcherPriority. Check the example. Something is wrong with window, because if you put e. Radiobuttons must be used in the same panel to have only one selected. Every panek that contains radiobuttons permit to select one of them. If you want a wysiwyg screen, you have to place controls inside a canvas panel, instead of a grid. Thanks for this. You have solved big problem.
I am interested to know, its always creating new instance of control and making them context of main form. Here, what is happening with old instance? Are they still holding memory or are they released? How can we confirm it? Hi Prasad, usually the old instance is released from memory, because there are no more references to MainWindow that keeps it alive and so the GC collects the old instance.
Same for event subscription etc… This article solves a problem that all WPF application that contained Pages had, because the journal was keeping pages into memory and causing huge memory leaks.When building desktop applications these days, most of the application that I build are either raw utilities or very document centric applications.
I'm currently working on the latter and for those it's quite common to have a single application instance that displays all documents inside of that single instance.
To deal with this in an application you need to be able to detect that another instance is already running and then pass some information - usually the file name arguments - on to the original instance so that it can open the requested documents. To set the stage I've been working on a WPF application in my spare time over the last few weeks called Markdown Monster. It's a document based application to handle Markdown editing with an extension model so you can easily plug in custom functionality.
Trying to keep the editor fairly minimal and use extensions to provide most of the useful support functionality. Some extensions that I'm building are for screen captures with SnagIt and a WebLog publishing add-in that I started using to post my blog posts. It's been a fun project to play with - it's been a while since I've used WPF and I realized I still hate it even while recognizing that there's so much that you can do with it if you put in the time.
After a bit of struggling I was able to get my first usable prototypes built and I've now been using it to get my last few blog posts - including this one - published with it. It's still pretty early and clearly a work in progress but if you're interested you can check out early builds from here:. So one of the features of this editor is that it should run as a single document that displays all open documents in tabs. Markdown Monster associates itself as an editor for.
There are a lot of different approaches available to do this and while looking for solutions on how to accomplish this effectively most of the solutions struck me as overly complex. Most of the samples I've seen for Singleton based apps don't address the communication aspect of the second instance forwarding parameters - or if they do, they are using a fairly complex communication mechanism. When I started out on this I started with simplest thing I could think of, which is writing command line arguments to a file from the second instance, and using a FileWatcher to pick up the file and read the command line arguments from it.
It worked but I ran into some problems - that it turned out were unrelated to the FileWatcher approach. While trying to figure out some crazy WPF Kernel crashes during early shutdown which were unrelated to the FileWatcher code in the endI also created a NamedPipes implementation. While a little more code, it's a cleaner and more direct approach that lets the two instances directly communicate with each other.
A default WPF application is different than most other. NET applications in that it hides the Main function. Main still exists of course, but it's generated as part of the generated App class that WPF creates in App.
The goal for secondary instances is to immediately detect a second instance and exit before WPF gets control. As you can see from the code above, if you leave the default Main in place, the earliest you can get control is in the App constructor.